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Table of Contents

V.92 Modem on Hold for Cisco AS5350, Cisco AS5400, and Cisco AS5850 Universal Gateways and Cisco AS5800 Universal Access Servers

V.92 Modem on Hold for Cisco AS5350, Cisco AS5400, and Cisco AS5850 Universal Gateways and Cisco AS5800 Universal Access Servers

Feature History

Release Modification

12.2(2)XA

This feature was introduced on Cisco AS5350 and Cisco AS5400 universal gateways running NextPort firmware.

12.2(2)XB

This feature was supported with Cisco IOS Software Release 12.2(2)XB.

12.2(2)XB1

This feature was supported on Cisco AS5800 universal access servers and Cisco AS5850 universal gateways.



This feature module introduces the V.92 International Telecommunication Union Telecommunication Standardization Sector (ITU-T) standard Modem on Hold (MOH) feature on NextPort/DFC-108NP-bearing platforms for use with Cisco IOS Release 12.2(2)XA and 12.2(2)XB.

This document includes the following sections:

Feature Overview

V.92

To remain current with industry needs, the ITU-T V.90 modem standard recommendations have been enhanced. The new standard, V.92, meets the need for a digital modem and analog modem pair on the Public Switched Telephone Network (PSTN). V.92 improves the upstream data signaling rate and adds new features that enhance modem usability. These new modem protocols and standards are implemented at the modem level.

This feature module introduces the V.92 Modem on Hold feature on Cisco AS5350, Cisco AS5400, and Cisco AS5850 universal gateways and Cisco AS5800 universal access servers.


Note   The other feature introduced with the new V.92 standard is V.92 Quick Connect, which is documented in the V.92 Quick Connect for Cisco  AS5350, Cisco AS5400, and Cisco AS5850 Universal Gateways and Cisco AS5800 Universal Access Servers feature module. V.92 Modem On Hold and V.92 Quick Connect can be enabled independently of each other.

NextPort firmware provides V.92 capabilities bundled with existing NextPort features. The NextPort Dial Feature Card (DFC-108NP) is responsible for the ITU implementation of V.92 and the collection of statistics related to the new features, including the new Modem States that occur with the additional negotiations for V.92. The statistics are collected by the dial feature card (DFC) but are passed to and stored in Cisco IOS software. Cisco IOS software is responsible for controlling the features and displaying the new statistics.

The Cisco AS5800 uses the NextPort high density dial termination card to implement this feature. Both voice and dial technologies are supported when used in a Cisco 5850 universal gateway.


Note   V.92 is packaged with V.44 in Cisco IOS software. For more information about V.44, refer to theV.44 LZJH Compression for Cisco AS5350, Cisco AS5400, and Cisco AS5850 Universal Gateways and Cisco AS5800 Universal Access Servers feature module.

Modem on Hold

V.92 Modem on Hold allows a dial-in customer to suspend a modem session to answer an incoming voice call or to place an outgoing call while engaged in a modem session. When the dial-in customer uses Modem on Hold to suspend an active modem session to engage in an incoming voice call, the Internet service provider (ISP) modem listens to the original modem connection and waits for the dial-in customer's modem to resume the connection. When the voice call ends, the modem signals the telephone system to end the second call and return to the original modem connection, then the modem signals the ISP modem that it is ready to resume the modem call. Both modems renegotiate the connection, and the original exchange of data continues.


Note   This feature is designed for use on telephone lines that are configured for call-waiting service; call-waiting signals trigger the suspension of the modem session. If call-waiting service is not present on the subscriber's line, other callers receive a busy signal, and the modem session is not interrupted.

Use of the V.92 Modem on Hold feature for Cisco NextPort firmware can be controlled globally using AT commands (modemcaps) or can be controlled on a per-caller basis using the RADIUS distributed client/server system.


Note   You are not required to have a RADIUS server to use the Modem on Hold feature.

The following sections contain information about controlling the V.92 Modem on Hold feature:

AT Commands (Modemcaps) and S-Registers

V.92 Modem on Hold is disabled by default and is controlled with standard AT commands and S-registers. V.92 is enabled and disabled with the S29 S-register (S29 = 12), and Modem on Hold is controlled with the S62 S-register (S62 must be set to enable Modem on Hold). AT commands download the configuration to the modem at the end of every call. The ATSn=v and ATSn? AT commands are used to configure V.92 Modem on Hold on NextPort platforms. Table 1 lists additional S-register parameters used to enable and disable the feature.

To disable V.92 Modem on Hold, you can use a modemcap (for example, s62=0s63=3s21=15s29=12) or set the S29 register to any number other than 12. You can also use the RADIUS vendor-specific attribute (VSA) to disable Modem on Hold if the feature was initially enabled by the default value (modemcap).


Note   If the feature is enabled using S29=12 and Modem on Hold is disabled using S62=0, statistics for the number of times a dial-in customer requests an on-hold are tracked in the MOH link information parameters. However, completely disabling the feature by setting S29 to a value other than 12 disables the reporting of all MOH statistics.

For detailed information about the AT commands and S-registers used to control V.92 on NextPort platforms, refer to the AT Command Set and Register Summary for NextPort Platforms.


Table 1: V.92 Modem on Hold S-Registers
Name Register Index Default Description

Modem standard

S29

NextPort 0x8013

12 (V.92 enabled)

0 = V.34 Automode, without V.32ter

1 = V.34 Automode, without V.32ter

2 = V.32ter Automode

3 = V.32bis Automode

4 = V22bis Automode

5 = K56Flex

6 = V.90 Automode (V.92 builds only)

7 = (reserved)

8 = V.110

9 = (reserved)

10 = V.120

11 = Clear Channel

12 = V.92 Automode (V.92 builds only)

MOH timeout

S62

NextPort0x803f

0

0: MOH disabled

1: 10 seconds

2: 20 seconds

3: 30 seconds

4: 40 seconds

5: 1 minute

6: 2 minutes

7: 3 minutes

8: 4 minutes

9: 6 minutes

10: 8 minutes

11: 12 minutes

12: 16 minutes

13: No limit

RADIUS Authorization

Per-user control of Modem on Hold can be configured for caller authorization using a RADIUS server. RADIUS servers use the vendor-specific attribute (VSA) capability to configure Modem on Hold for individual users. The current attribute=value protocol syntax has been extended with the new
Modem on Hold attribute. You can enter the following value for this attribute:

Alternatively, you can enter the inf keyword, which allows the modem to remain on hold indefinitely.

If the Modem on Hold configuration is not present, or if it is not syntactically correct, the modem uses its default configuration for Modem on Hold. The default operation can be modified by using a modemcap string. Following authentication of a dial-in user, an additional control command is sent to the modem if the dial-in user does not have a default Modem on Hold configuration.


Note   Code space requirements for RADIUS support is less than 2KBs. There are no additional data space requirements.

V.92 Modem on Hold running on systems using RADIUS authorization increases the length of RADIUS response packets by approximately 20 bytes. RADIUS databases increase in size by approximately the same amount for each dial-in user with a nondefault Modem on Hold attribute value.

With RADIUS, authentication and authorization occur as part of the same process. When a caller connects to the access server, the caller enters a user ID and password in response to prompts from the access server. This information is formatted as a RADIUS request packet and is sent to the appropriate RADIUS server. If the user ID is valid and the password matches, the RADIUS server responds with a packet containing authorization data for the connection. This authorization data contains the Modem on Hold configuration if it is present in the RADIUS database.

The access server interprets the response from the RADIUS server and performs any actions associated with the authorization data. For Modem on Hold, a command is sent from the Cisco IOS host to the NextPort channel to set the Modem on Hold parameters. No confirmation from the channel is required.

When the client modem requests a Modem on Hold operation, the modem switches to an on-hold state, which prevents further data from being queued to the connection. When the Cisco IOS software receives the request to go on hold, any transmit packets queued to local Cisco IOS queues (packets not already posted to the queues shared between the Cisco IOS software and the modem) are discarded. This mechanism reduces the possibility that stale data will be transmitted to the modem when the connection is reactivated. It also reduces the number of buffer resources that are tied up while a modem is on hold.


Note   When using a RADIUS server, placement of commas is important. The asterisk in the modem-on-hold attribute indicates that the attribute is optional. If a modem does not support Modem on Hold, then the call might continue anyway. If the asterisk is replaced by an "=", the attribute is required, and modems that do not support Modem on Hold terminate the calls following authentication.
The value of the attribute is the number of seconds allowed for the on-hold state. This value is rounded by the Cisco IOS software to one of the permissible values. The number can be replaced with the inf command, which allows unlimited on-hold time. Case is significant for both attribute names and values.


Note   If your router is configured for RADIUS, the RADIUS server must be accessible to the router. The server must also be capable of responding to authentication requests with VSA attributes.

Configuring V.92 Modem on Hold with RADIUS

If you use RADIUS to configure the Modem on Hold feature, use the modem-on-hold attribute, where the VALUE attribute is a nonnegative integer in seconds for maximum time on hold allowed. VALUE can be one of the following:

The following example shows RADIUS enabled where Modem on Hold is optional:

    vendor-specific=9:1:modem-on-hold*VALUE
    Note   The examples shown below were established on the Cistron open-source server. Your server syntax may vary.

# This user can use MOH without time limits. (inf) # MOH capability is not required for the connection (*) testi Auth-Type = Local, Password = "test" Service-Type = Login-User, Cisco-AVPair = "modem-on-hold*inf" # This user can use MOH for 30 seconds. # MOH capability is not required for the connection. test30 Auth-Type = Local, Password = "test" Service-Type = Login-User, Cisco-AVPair = "modem-on-hold*30" # This user can not use MOH. # MOH capability is not required for the connection. test0 Auth-Type = Local, Password = "test" Service-Type = Login-User, Cisco-AVPair = "modem-on-hold*0" # This user can not use MOH. # But MOH capability IS required for the connection. # If the user logs on to a device that does not support # MOH (eg the console), he will be disconnected after # authentication. testr  Auth-Type = Local, Password = "test" Service-Type = Login-User, Cisco-AVPair = "modem-on-hold=0" # This user gets the default MOH setting. # The default setting is disabled, unless overridden # by a modemcap entry. testx  Auth-Type = Local, Password = "test" Service-Type = Login-User # This user can go on hold for 60 seconds # in a PPP link. The service type determines # which calls get the MOH setting. lucy Auth-Type = Local, Password = "test" Service-Type = Framed-User, Cisco-AVPair = "modem-on-hold*60"
Note   The service type defines when the AVPair is applied. For different RADIUS servers, the Cisco-AVPair syntax might be different, but the value in quotes does not change. Case is important: The entire text in quotes must be lowercase.

For more information about using RADIUS, refer to the Configuring RADIUS documentation.

Modem Enhancements for V.92 Modem On Hold

The following modem enhancements have been made for the implementation of the
V.92 Modem on Hold feature:

Disconnect Reasons

V.92 Modem on Hold Disconnect Reasons is the method by which a modem tells the Cisco IOS software (host) why it has terminated its session with a client through the Modem on Hold cleardown by modem and the Modem on Hold timeout values. Table 2 lists the new Modem on Hold Disconnect Reasons.


Table 2: Modem On Hold Disconnect Reasons
Name Description

DR_MOH_CLRD

Modem On Hold cleardown by modem

DR_MOH_TIMEOUT

Modem On Hold timeout value reached

Duration Limit Timer

The Modem on Hold duration limit timer is supported within dialed number ID service (DNIS), calling line ID (CLID), RADIUS (but not TACACS+), and global resource pool manager server (RPMS) virtual groups. This support permits ISPs to associate the Modem on Hold feature and its timer limit according to customer needs. When the Modem on Hold timer is active (a modem is on hold), it must take precedence over the idle timer. For example, if the idle value is five minutes and the Modem on Hold duration limit is ten minutes, the customer is permitted to be on another call for up to ten minutes without being disconnected after five minutes by the idle timer. The Modem on Hold timer value resets at the end of each on-hold session.

Modem on Hold Link Information Parameters


Table 3:
Modem on Hold Link Information Parameters
Name Description

MOH Status

0: Modem is not on hold

1: Modem is on hold

MOH Count

Number of times the modem is on hold

MOH Request Count

Number of times the modem received Modem on Hold requests.

Total MOH Time

Total holding time: 65,535 seconds maximum

Current MOH Time

Current holding time: 65,535 seconds maximum

Call Waiting Retrains

Number of times a retrain occurred due to a call-waiting signal

Modem States

This feature supports modem states, which are discrete states that a modem transitions through, during, and after negotiation with a client modem. These states include the Modem on Hold input state, the Steady input state, and the Steady, Steady Retrain, and Terminate output states.

New and Modified MIBs

Existing MIBs that show the status of modem settings have been extended to show V.92 Modem on Hold configuration status. New MIBs have been created to report the incidence of V.92 Modem on Hold request calls coming into the server and to monitor on-hold status.

Supported Module Firmware and Cisco IOS Software

V.92 Modem on Hold is supported on the following firmware and software:

Benefits

Allows Voice Calls Without Interruption of Existing Modem Connection

V.92 Modem on Hold allows the origination and reception of voice calls without disturbing preexisting modem sessions. With Modem on Hold, calls can ring through to the dial-in user without requiring the expense of a second telephone line.

Per-Use Enabling

Service providers can enable Modem on Hold on a per-user basis for premium service opportunities.

Standard Modem Feature

V.92 is a standard modem feature that is offered as a no-cost upgrade to the installed system.

V.92 Compatibility

Modems that support V.92 are fully compatible with modems that do not support it. If a modem that supports Modem on Hold connects with a modem that does not support it, the modems will connect normally. However, the Modem on Hold function is not available for that call.

Restrictions

Related Features and Technologies

Related Documents

Supported Platforms

Supported Standards, MIBs, and RFCs

Standards

MIBs

To obtain lists of supported MIBs by platform and Cisco IOS release, and to download MIB modules, go to the Cisco MIB web site on Cisco.com at the following URL:
http://www.cisco.com/public/sw-center/netmgmt/cmtk/mibs.shtml

RFCs

No new or changed RFCs are supported by this feature.

Prerequisites

Configuration Tasks

None

For additional information, refer to the following documents:

Monitoring and Maintaining Modem on Hold

Use the following show commands in privileged EXEC mode.

Command Purpose
Router#show spe modem active

Displays the modem service statistics of all active calls on specified service processing elements (SPEs).

Router# show spe modem disconnect-reason

Displays the digital disconnect reasons for the specified SPE or SPE range.

Router#show port operational-status

Displays the operational status of the specified ports or the specified port range.

Router#show port modem log

Displays the event log with oldest event first.

Router#show port configuration

Displays the configuration information for specified ports or the specified port range.

Router#show spe modem csr

Displays the call success rate (CSR) for the specified SPEs.

Router#show spe modem summary

Displays the modem service history statistics for specified SPEs.

Router#show call calltracker active

Displays the port level information stored within the Call Tracker active database for all active modem calls.

Configuration Examples

None

Command Reference

This section documents new or modified commands. All other commands used with this feature are documented in the Cisco IOS Release 12.2 command reference publications.

show call calltracker active

To display all information stored within the Call Tracker active database for all active calls, use the show call calltracker active command in privileged EXEC mode.

show call calltracker active [category [isdn | modem | other | v110 | v120]]

Syntax Description

category

(Optional) Displays Call Tracker data for a specific type of call. The default is to show all calls, regardless of type. By specifying the category keyword with one of the optional modem type keywords, Call Tracker only shows calls whose records indicate that category.

isdn

Displays Call Tracker data for calls on the ISDN.

modem

Displays all of the information calls.

other

Displays Call Tracker data for other call categories.

v110

Displays Call Tracker data for V.110 calls.

v120

Displays Call Tracker data for V.120 calls.

Defaults

Specific activity and configuration information is not displayed.

Command Modes

Privileged EXEC

Command History

Release Modification

12.1(2)XH

This command was introduced.

12.1(3)T

This command was introduced.

12.2(2)XA

This command was supported on the Cisco AS5350.

12.2(2)XB

This command was supported with Cisco IOS Release 12.2(2)XB.

Usage Guidelines

This command allows you to display call activity for a single supported call category type, if desired, by using the category keyword with one of the optional keywords.

The Call Tracker feature is enabled by entering the calltracker enable command. If there is no call on the specified port, the information of the most recent call is displayed. The show calltracker active command shows all calls, regardless of type, unless specified by the category option field.

(For detailed information about the Call Tracker feature, refer to the Cisco IOS Call Tracker feature module.)

Examples

The following example shows Call Tracker activity for modem calls:

Router# show call calltracker active category modem -------------------------- call handle=0000000058 -------------------------- status=Active, service=PPP, origin=Answer, category=Modem DS0 slot/cntr/chan=0/0/22, called=71071, calling=6669999 userid=maverick5200, ip=172.19.4.2, mask=255.255.255.0 setup=10/16/1999 18:29:20, conn=0.10, phys=17.00, service=24.71, authen=24.71 init rx/tx b-rate=28800/33600, rx/tx chars=0/0 resource slot/port=1/1, mp bundle=0, charged units=0, account id=75 idb handle=0x6185B968, tty handle=0x612F8598, tcb handle=0x0 ---------------------------------------------------------------------------- protocol: last=LAP-M, attempted=LAP-M compression: last=V.42bis-Both, supported= V.42bis-RX V.42bis-TX standard: last=V.34+, attempted=V.34+, initial=V.34+ snr=35 dB, sq=3, rx/tx level=-16/-15 dBm phase jitter: freq=0 Hz, level=0 degrees far end echo level=-83 dBm, freq offset=0 Hz phase roll=-99 degrees, round-trip delay=1 msecs digital pad=None dB, digital pad comp=0 rbs pattern=0, constellation=16 point rx/tx: symbol rate=3429/3429, carrier freq=1959/1959 rx/tx: trellis code=0/0, preemphasis index=6/0 rx/tx: constellation shape=Off/On, nonlinear encode=Off/On rx/tx: precode=Off/On, xmit level reduct=2/2 dBm rx/tx: chars=0/0, general info=0x0 rx/tx: link layer chars=0/0, NAKs=0/0 error corrected: rx/tx=0/0, rx bad=0 ec retransmissions=0, retransmitted frames=0 rx/tx ppp slip=0/0, bad ppp slip=0 rx/tx b-rate: last=28800/33600, lowest=28800/33600, highest=28800/33600 phase 2 projected max rx b-rate: client=19200, host=24000 phase 4 desired rx/tx b-rate: client=28800/33600, host=28800/33600 retrains: local=0, remote=0, failed=0 speedshift: local up/down=0/0, remote up/down=0/0, failed=0 v110: rx good=0, rx bad=0, tx=0, sync lost=0 SS7/COT status=0x00 v90: status=No Attempt, client=(n/a), failure=None rx/tx: max neg I frame=128/128, neg window=15/15 v42bis size: dictionary=1024, string=64 T401 timeouts=0, tx window closures=0, rx overruns=0 test err=0, reset=0, v0 synch loss=0 mail lost: host=0, sp=0 duration(sec)=16, disc reason=0x0 disc text=(n/a) --------5---------10--------15--------20--------25--------30 line shape : 0x1920212120202120202021202020202020202020201F1D191100 v8bis capab : 0x00000000000000000000000000000000000000000000 v8bis mod sl: 0x00000000000000000000000000000000000000000000 v8 jnt menu : 0x01E0C14513942A000000000000000000000000000000 v8 call menu: 0x01C14513942A00000000000000000000000000000000 v90 training: 0x00000000 v90 sgn ptrn: 0x00000000 state trnsn : 0x00010203041020404243FF00000000000000000000000000000000000000 0000 portwre diag: 0x00000000000000000000000000000000 phase 2 info: 0x010000F4EF221FF37E0001E4EFA21FF2E30001A4EF980101B7CF98003C00 00000024EF40000502160AE0304DFFFECE07A707A70D650D6500 phase 4 info: 0x01834070808340708000

Related Commands

Command Description

show calltracker handle

Displays the detailed data stored within Call Tracker for a specific call having specified unique call handle identifier.

show calltracker history

Displays all the information stored within the Call Tracker history database table for the most recent disconnected calls.

show port configuration

To display the configuration information for specified ports or the specified port range, use the
show port configuration command in privileged EXEC mode.

Cisco AS5400 with NextPort DFC

show port config {slot | slot/port}

Cisco AS5800 with Universal Port Card

show port config {shelf/slot | shelf/slot/port}

Syntax Description

slot

All ports on the specified slot. For the AS5400, slot values range from 0 to 7.

slot/port

All ports on the specified slot and SPE. For the AS5400, slot values range from 0 to 7 and port values range from 0 to 107.

shelf/slot

All ports on the specified shelf and slot. For the AS5800, shelf values range from 0 to 1 and UPC slot values range from 2 to 11.

shelf/slot/port

All ports on the specified SPE. For the AS5800, shelf values range from 0 to 1, slot values range from 2 to 11, and port values range from 0 to 323.

Defaults

No default behavior or values

Command Modes

Privileged EXEC

Command History

Release Modification

12.1(1)XD

This command was introduced on the Cisco AS5400.

12.1(3)T

This command was supported on the Cisco AS5400 and Cisco AS5800.

12.2(2)XA

This command was supported on the Cisco AS5350.

12.2(2)XB

This command was supported with Cisco IOS Release 12.2(2)XB.

Usage Guidelines

The port should have an associated active session when the show port configuration command is entered.

Examples

The following example shows output from the show port configuration command on the Cisco AS5400 with NextPort dial feature card (DFC). This example shows port configuration for the modem service port slot 1, port 0.

Router# show port configuration 1/0 Service Type     :Modem service Originate/Answer Mode :Answer Data Bits Selection :8 Parity Selection :No Parity Stop bits Selection :1 V.42 ODP generation :Enabled EC Autodetect Time-out :5000 ms Protocol Negotiation Time-out :10000 ms Protocol Negotiation Fallback character :13 Protocol Negotiation Retransmission Limit :12 EC Min, Max Octets Frame length :256 Data Compression :V.44Tx V.44Rx ARA Error Correction :ARA1.0 & ARA2.0 Disabled V.42 Error Correction :V.42(LAP-M) Originate&Answer enabled MNP Error Correction :MNP Originate&Answer enabled Link Protocol Fallback :Async Framing (Start/Stop/Parity) Calling Tone :Disabled Guard Tone :Disabled Modem Standard :V.90 Automode Max Non-PCM Connect Rate :33600 bps Min Non-PCM Connect Rate :300 bps Max PCM Connect Rate :60000 bps Min PCM Connect Rate :28000 bps Signal Quality Threshold :Bit Errors >= 1:1000 cause recovery Fallback/Fallforward Squelch Timer :500 ms Fall Forward Timer :10000 ms Fall Back Timer :500 ms Terminate Time-out :20 secs Wait for Data Mode Time-out :60 secs Lost Carrier To Hang-up Delay :1400 ms PCM Transmit Level Setting :-13 dBm Retrain Limit :4 V.34 Max Symbol Rate :3429 Baud V.34 Min Symbol Rate :2400 Baud V.34 Carrier Frequency :Auto Carrier Selection V.34 Preemphasis Filter Selection :11 +++ Escape Detection :Enabled-in-Originate-Mode-Only AT Command Processor :Enabled Call Setup Delay :0 ms Automatic Answer Delay :2 secs Escape Detection Character :ASCII 43 (+) Carriage Return Character :ASCII 13 (CR) Line Feed Character :ASCII 10 (LF) Backspace Character :ASCII 8 (BS) Pause Before Blind Dialing :2 secs Comma Dial Modifier Time :2 secs MOH Timeout  :No limit QC Configuration :Enabled ANSpcm Level -12dBm V.44 Max Tx Codewords :256 V.44 Max Rx Codewords :256 V.44 Max Tx String Length  :32 V.44 Max Rx String Length :32 V.44 Max Tx History Size :256 V.44 Max Rx History Size :256

The following example shows port configuration information for a digital service port slot 2, port 23 on the Cisco AS5800 with universal port card.

Router# show port configuration 1/8 Shelf/Slot/SPE/Port -- 1/8/27/165 Service Type : Modem service Originate/Answer Mode : Answer Data Bits Selection : 8 Parity Selection : No Parity Stop bits Selection : 1 V.42 ODP generation : Enabled EC Autodetect Time-out : 5000 ms Protocol Negotiation Time-out : 10000 ms Protocol Negotiation Fallback character : 13 Protocol Negotiation Retransmission Limit : 12 EC Min, Max Octets Frame length : 256 Data Compression : V.42bis or MNP5 ARA Error Correction : ARA1.0 & ARA2.0 Disabled V.42 Error Correction : V.42(LAP-M) Originate&Answer enabled MNP Error Correction : MNP Originate&Answer enabled Link Protocol Fallback : Async Framing (Start/Stop/Parity) Calling Tone : Disabled Guard Tone : Disabled Modem Standard : V.90 Automode Max Non-PCM Connect Rate : 33600 bps Min Non-PCM Connect Rate : 300 bps Max PCM Connect Rate : 60000 bps


Table 4: show port configuration Field Descriptions
Field Description

Service Type

Digital or analog service type.

Originate/Answer Mode:

Answer or originate. Default is answer.

Data Bits Selection:

7, 8, or 9 data bits. Default is 8.

Parity Selection:

0 = no parity, 1 = even parity, 2 = odd parity. Default is no parity.

Stop Bits Selection:

1 or 2 stop bits. Default is 1 stop bit.

V.42 ODP generation:

Disabled or generate ODP sequence when originating a V.42 call. Default is Generate ODP sequence when originating a V.42 call.

Error Correction Autodetect Time-out value:

Maximum period during which the modem will run an automated detection machine upon the incoming data. Default is 5000 ms.

Protocol Negotiation Time-out value:

Maximum wait for error correction protocol negotiation before fallback. Default is 10000 ms.

Protocol Negotiation Fallback Character:

0 to 127. Default is 13.

Protocol Negotiation Retransmission Limit:

0 = Do not disconnect on excessive retransmission; 1 to 255 = number of successive retransmissions to cause disconnect. Default is 12.

Error Correction Frame Length:

Buffer length; 64 to 1024 octets of data. Default is 256.

Data Compression:

Disabled, V.42bis, MNP5, or V.42bis or MNP5 (V.42 has precedence). Default is V.42bis or MNP5 (V.42 has precedence).

ARA Error Correction:

ARA1.0 & ARA2.0 Disabled, Enabled for Answer only, Enabled for Answer originate ARA1.0, and Enabled for Answer originate ARA2.0. Default is Enabled for Answer only.

V.42 Error Correction:

V.42(LAP-M) Disabled, V.42(LAP-M) Originate & Answer enabled. Default is disabled.

MNP Error Correction:

MNP Disabled or MNP Originate and Answer enabled. Default is MNP Originate and Answer enabled.

Link Protocol Fallback:

Asynchronous framing (Start/Stop/Parity), Synchronous framing (Raw 8 bits to DSP), or Disconnect (Hang-up). Default is Asynchronous framing (Start/Stop/Parity).

DSP processor MVIP TDM slice:

0 to 15.

Calling Tone:

Disable or Send calling tone. Default is disable.

Guard Tone:

Guard tone disabled, Use Guard tone (V.22 & V.22bis only). Default is disabled.

Modem Standard:

V.34bis Automode with terbo, V.34bis Automode skip terbo, V.32 terbo Automode, V.32bis Automode, V.22bis Automode, or K56Flex 1.1. Default is V.34bis Automode with terbo.

Max. Connect Rate:

75 to 56000 bps.

Min. Connect Rate:

75 to 56000 bps.

Signal Quality Threshold:

No action on bit errors, Bit Errors >=1:100 cause recovery, Bit Errors >=1:1000 cause recovery, Bit Errors >=1:10000 cause recovery, Bit Errors >=1:100000 cause recovery, or Bit Errors >=1:1000000 cause recovery. Default is 1:1000.

Fallback/Fallforward Squelch Timer:

Time to delay after a speed shift before allowing another speed shift. Default is 500 ms.

Fall Forward Timer:

Elapsed time with continuous good signal quality to cause a fall forward. Default is 10000 ms.

Fall Back Timer:

Elapsed time with bad signal quality to cause a fallback. Default is 500 ms.

Terminate Time-out:

Elapsed time after a disconnect request before forcing a link disconnect. During this period, the modem sends buffered data and then clears down the link. Default is 20 seconds.

Wait for Data Mode Time-out:

Maximum time during link establishment before disconnection. Default is 40; 60 for K56Flex.

Lost Carrier To Hang-up Delay:

Maximum time without a carrier to cause the link disconnect. Default is 1400 ms.

Transmit Level Setting:

6dBm, 7dBm, 8dBm, -20dBm, or -21dBm. Default is 9 dBm.

Retrain Limit:

Maximum successive failed retrains to cause the link to disconnect. Default is 4.

V.34 Max. Symbol Rate:

2400 baud, 2743 baud, 2800 baud, 3000 baud, 3200 baud, or 3429 baud. Default is 3429 baud.

V.34 Min. Symbol Rate:

2400 baud, 2743 baud, 2800 baud, 3000 baud, 3200 baud, or 3429 baud. Default is 2400 baud.

V.34 Carrier Frequency:

Low Carrier, High Carrier, or Auto Carrier Selection. Default is High Carrier.

V.34 Preemphasis Filter Selection:

0 to 10 = a selected filter; 11 = Automatic Preemphasis Selection. Default is 11.

Tx and Rx Signaling Type:

NULL signaling, MF signaling, DTMF signaling, Lower band R2 signaling, Upper band R2 signaling, or R1 signaling. Default is NULL signaling.

Call Progress Tone Detection:

No tone detection, Dial tone detection, Ring-Back tone detection, or Busy tone detection. Default is no tone detection.

+++ Escape Detection:

Disabled, Enabled, or Enabled-in-Originate-Mode-Only. Default is Enabled-in-Originate-Mode-Only.

AT Command Processor:

Disabled or Enabled. Default is disabled.

Call Set Up Delay:

No delay before link initiation, delay value (1 to 255). Default is no delay.

Automatic Answer:

Answer immediately, delay value (1 to 255 seconds). default is 1 second.

Escape Detection Character:

ASCI value (0 to 127). Default is 43.

Carriage Return Character:

ASCI value (0 to 127). Default is 13.

Line Feed Character:

ASCI value (0 to 127). Default is 10.

Backspace Character:

ASCI value (0 to 127). Default is 8.

Pause Before Blind Dialing:

2 to 255 seconds. Default is 2.

Wait For Carrier After Dial:

Wait for data mode timeout.

Comma Dial Modifier Time:

2 to 255 seconds. Default is 2.

Related Commands

Command Description

show port operational-status

Displays the operational status of the specified ports or a specified range of ports.

show port modem log

To display the events generated by the modem sessions, use the show port modem log command in privileged EXEC mode.

Cisco AS5400 with NextPort DFC

show port modem log [reverse slot/port] [slot | slot/port]

Cisco AS5800 with Universal Port Card

show port modem log [reverse shelf/slot/port] [shelf/slot | shelf/slot/port]

Syntax Description

reverse

(Optional) Displays the modem port history event log with the most recent event first.

slot

(Optional) All ports on the specified slot. For the AS5400, slot values range from 0 to 7.

slot/port

(Optional) All ports on the specified slot and SPE. For the AS5400, slot values range from 0 to 7 and port values range from 0 to 107.

shelf/slot

(Optional) All ports on the specified shelf and slot. For the AS5800, shelf values range from 0 to 1 and UPC slot values range from 2 to 11.

shelf/slot/port

(Optional) All ports on the specified SPE. For the AS5800, shelf values range from 0 to 1, slot values range from 2 to 11, and port values range from 0 to 323.

Defaults

No default behavior or values

Command Modes

Privileged EXEC

Command History

Release Modification

12.1(1)XD

This command was introduced on the Cisco AS5400.

12.1(3)T

This command was supported on the Cisco AS5400 and Cisco AS5800.

12.2(2)XA

This command was supported on the Cisco AS5350. Additional link and states information was added.

12.2(2)XB

This command was supported with Cisco IOS Release 12.2(2)XB.

Usage Guidelines

The port modem test log displays the results of the service processing element (SPE) diagnostics tests.

Examples

Link Info and States are the affected changes in the modem log with this feature. The states are shown in numeric order. The following example shows port events status on slow 1, port 0.

Router# show port modem log Port 1/0 Events Log Modem Static event: Connect Protocol : LAP-M Compression : V.44 Connected Standard : V.34+ TX,RX Symbol Rate : 3429, 3429 TX,RX Carrier Frequency : 1959, 1959 TX,RX Trellis Coding : 16/16 Frequency Offset : 0 Hz Round Trip Delay : 0 msecs TX,RX Bit Rate : 31200, 28800 Robbed Bit Signalling (RBS) pattern : 0 Digital Pad : None Digital Pad Compensation : None MNP10EC : MNP10EC not active QC Configuration                        : No QC Requested DC Negotiated Tx,Rx String Length:142, 142 DC Negotiated Tx,Rx Codewords:2048, 2048 DC Negotiated Tx,Rx History Size:10240, 10240 Diagnostic Code:00 00 00 00 00 00 00 00 Modem Dynamic event: Sq Value : 6 Signal Noise Ratio : 37 dB Receive Level : -12 dBm Phase Jitter Frequency : 2 Hz Phase Jitter Level : 2 degrees Far End Echo Level : -90 dBm Phase Roll : 0 degrees Total Retrains : 0 EC Retransmission Count : 0 Characters transmitted, received : 0, 0 Characters received BAD : 0 PPP/SLIP packets transmitted, received : 0, 0 PPP/SLIP packets received (BAD/ABORTED):0 EC packets transmitted, received OK : 0, 0 EC packets (Received BAD/ABORTED) : 0 Total Speedshifts : 0 MOH Status : MOH Off MOH Count : 0 MOH Request Count : 0 Total MOH Time : 0 secs Current MOH Time : 0secs Call Waiting Retrains: 0 DC Encoder,Decoder Stat:Compressed, Compressed DC Tx,Rx Compression Ratio:0.00:1, 0.00:1 DC Tx,Rx Dictionary Reset Count:0, 0 Diagnostic Code:00 00 00 00 00 00 00 00 Modem End Connect event: Call Timer : 31 secs Disconnect Reason Info : 0x108 Type (=4 ): Rx (line to host) data flushing - OK Class (=1 ): DSP condition Reason (=8 ): Modem On Hold cleardown by modem Total Retrains : 0 EC Retransmission Count : 1 Characters transmitted, received : 3, 105 Characters received BAD : 0 PPP/SLIP packets transmitted, received : 0, 0 PPP/SLIP packets received (BAD/ABORTED) : 0 EC packets transmitted, received OK : 3, 8 EC packets (Received BAD/ABORTED) : 0 Total Speedshifts : 0 MOH Status : MOH Off MOH Count : 0 MOH Request Count : 0 Total MOH Time : 0secs Current MOH Time : 0secs Call Waiting Retrains: 0 DC Tx,Rx Compression Ratio:0.00:1, 0.00:1 DC Tx,Rx Dictionary Reset Coun:0, 0 Diagnostic Code:00 00 00 00 00 00 00 00 Modem State event: State: Idle State: Connect State: Link State: Quick Connect State: Train Up State: EC Negotiating State: Steady State: Steady Retrain State: Steady Speedshift State: Steady Escape State: Terminate State: Modem On Hold State: Steady QC State: V.8bis Exchange State: Ranging State: Ranging Short State: Half Duplex Train

The following is sample output for the Cisco AS5800 with universal port card. This example shows the port history event log for slot 8, ports 0 to 6:

Router# show port modem log 1/8/0 1/8/6 Port 1/08/00 Events Log 09:09:53: Service Type: DATA_FAX_MODEM 09:09:53: Service Mode: DATA_FAX_MODEM 09:09:53: Session State: FLUSHING 09:09:53: Service Type: DATA_FAX_MODEM 09:09:53: Service Mode: DATA_FAX_MODEM 09:09:53: Session State: IDLE 09:09:53: Modem State event: State: Terminate 09:09:53: Modem End Connect event: Call Timer : 26 secs Disconnect Reason Info : 0x1F00 Type (=0 ): <unknown> Class (=31 ): Requested by host Reason (=0 ): non-specific host disconnect Total Retrains : 0 EC Retransmission Count : 0 Characters transmitted, received : 2633, 485 Characters received BAD : 0 PPP/SLIP packets transmitted, received : 0, 0 PPP/SLIP packets received (BAD/ABORTED) : 0 EC packets transmitted, received OK : 27, 21 EC packets (Received BAD/ABORTED) : 0 09:09:54:Modem Link Rate event: 09:09:55: Service Type: DATA_FAX_MODEM 09:09:55: Service Mode: DATA_FAX_MODEM 09:09:55: Session State: IDLE 09:09:55: Service Type: DATA_FAX_MODEM 09:09:55: Service Mode: DATA_FAX_MODEM 09:09:55: Session State: ACTIVE 09:09:55: Modem State event: State: Connect 09:09:55: Modem State event: State: Link 09:09:55: Modem State event: State: Train Up 09:09:55: Modem State event: State: EC Negotiating 09:09:55: Modem State event: State: Steady 09:09:55: Modem Static event: Connect Protocol : LAP-M Compression : V.42bis Connected Standard : V.34+ TX,RX Symbol Rate : 3429, 3429 TX,RX Carrier Frequency : 1959, 1959 TX,RX Trellis Coding : 16/16 Frequency Offset : 0 Hz Round Trip Delay : 1 msecs TX,RX Bit Rate : 31200, 28800 Robbed Bit Signalling (RBS) pattern : 0 Digital Pad : None Digital Pad Compensation : None 4 bytes of link info not formatted : 0x00 0x00 0x00 0x00 0x00 09:09:56: Modem Dynamic event: Sq Value : 5 Signal Noise Ratio : 38 dB Receive Level : -15 dBm Phase Jitter Frequency : 13 Hz Phase Jitter Level : 0 degrees Far End Echo Level : -90 dBm Phase Roll : 0 degrees Total Retrains : 0 EC Retransmission Count : 0 Characters transmitted, received : 0, 0 Characters received BAD : 0 PPP/SLIP packets transmitted, received : 0, 0 PPP/SLIP packets received (BAD/ABORTED) : 0 EC packets transmitted, received OK : 0, 0 EC packets (Received BAD/ABORTED) : 0 09:09:58: Service Type: DATA_FAX_MODEM 09:09:58: Service Mode: DATA_FAX_MODEM 09:09:58: Session State: FLUSHING 09:09:58: Service Type: DATA_FAX_MODEM 09:09:58: Service Mode: DATA_FAX_MODEM 09:09:58: Session State: IDLE 09:09:58: Modem State event: State: Terminate   .   .   .

Table 5 describes the significant fields shown in the displays.


Table 5: show port modem log Field Descriptions
Field Event State Description

Port<slot/port> /Events Log

Port number and slot is displayed.

Service type:

Data fax modem is displayed.

Service mode:

Data fax modem mode.

Session State:

Idle or busy state.

Incoming called number.

The number of the incoming call.

Modem <slot/port> Events Log:

The modem for which log events are currently displayed.

Modem State Event

Current state of the MICA modem, which can be any of the following:

Connect

Modem is connected to a remote host.

Open

Open modem event.

Link

Link protocol event occurred.

Training

Modem retraining event.

EC correction

Error correction frames transmitted or received.

Steady

Steady modem event.

Bad

Inoperable state, which is configured by the modem bad command.

Bad*

Inoperable state, which is configured by the modem startup-test command during initial power-up testing.

Reset

Modem is in reset mode.

D/L

Modem is downloading firmware.

Bad FW

Downloaded modem firmware is not operational.

Busy

Modem is out of service and not available for calls

Idle

Modem is ready for incoming and outgoing calls.

Static event:

Current static event of the MICA modem, which can be any of the following:

Connect protocol

Connection protocol used for the current session, which can be SYNC mode, ASYNC mode, ARA1.0, ARA2.0, LAP-M, or MNP.

Compression

Type of compression used for the current session, which can be None, V.42bis TX, V.42bis RX, V.42bis both, or MNP5 data compression.

Connected standard

Standards protocol used to connect, which can be V.21, Bell103, V.22, V.22bis, Bell212, V.23, V.32, V.32bis, V.32terbo, V.34, V.34+, or K56Flex 1.1.

TX, RX symbol rate

Symbol rate used to send samples to the line or receive samples off of the line.

TX, RX carrier frequency

Carrier frequency used by the remote service provider.

TX, RX trellis coding

Trellis coding received and transmitted.

Frequency offset

+/-32 in 1/8 Hx steps.

Round trip delay

Total round trip propagation delay of the link, which is expressed in milliseconds.

TX, RX bit rate

For RX, the bit rate from the remote service provider to the local service provider. For TX, the bit rate from the local service provider to the remote service provider.

Dynamic event:

Current dynamic event of the MICA modem, which can be any of the following:

Sq value

Signal quality value, which can be between 0 and 7 (0 is the worst possible quality).

Signal noise ratio

Expressed in decibels, which can be between 0 and 70 dB steps.

Receive level

Expressed in decibels, which can be between 0 and -128 dBm steps.

Phase jitter frequency

+/-32 in 1/8 Hz steps.

Phase jitter level

0 to 90 degrees.

Far end echo level

0 to -90 in dBm of far end echo level (that portion of the transmitted analog signal that has bounced off the remote modem's analog front end).

Phase roll

+/-32 in 1/8 Hz steps.

Total retrains

Count of total retrains.

EC retransmission

Count of total error correction retransmissions that occurred during the duration of the link.

Characters received, transmitted

Count of total characters received and transmitted.

Characters received BAD

A subset of the above total (Characters received, transmitted). Represents the total number of parity error characters.

PPP/SLIP packets received, transmitted

Total count of PPP/SLIP packets transmitted and received. This total could include all PPP/SLIP packets, including BAD/ABORTED packets.

PPP/SLIP packets received, (BAD/ABORTED)

Total count of the bad or aborted PPP/SLIP packets, which is a subset of the above (PPP/SLIP packets received, transmitted).

EC packets transmitted, received

Count of total error correction frames transmitted or received. This total could include all error correction packets, including BAD/ABORTED packets.

EC packets (received BAD/ABORTED)

Total count of the bad or aborted error correction packets, which is a subset of the above (EC packets transmitted, received).

Related Commands

Command Description

port modem startup-test

Performs diagnostic testing for all modems.

port modem autotest

Enables modem autotest. Automatically and periodically performs a modem diagnostics test for modems inside the access server or router.

show spe modem active

Displays active modem statistics of all SPEs, a specified SPE, or the specified SPE range.

show port operational-status

To display the active session's statistics, use the show port operational-status privileged EXEC command.

Cisco AS5400 with NextPort DFC

show port operational-status {slot | slot/port}

Cisco AS5800 with Universal Port Card

show port operational-status {shelf/slot | shelf/slot/port}

Syntax Description

slot

All ports on the specified slot. For the AS5400, slot values range from 0 to 7.

slot/port

All ports on the specified slot and SPE. For the AS5400, slot values range from 0 to 7 and port values range from 0 to 107.

shelf/slot

All ports on the specified shelf and slot. For the AS5800, shelf values range from 0 to 1 and UPC slot values range from 2 to 11.

shelf/slot/port

All ports on the specified SPE. For the AS5800, shelf values range from 0 to 1, slot values range from 2 to 11, and port values range from 0 to 323.

Defaults

No default behavior or values.

Command Modes

Privileged EXEC

Command History

Release Modification

12.1(1)XD

This command was introduced on the Cisco AS5400.

12.1(3)T

This command was supported on the Cisco AS5400 and Cisco AS5800.

12.2(2)XA

This command was supported on the Cisco AS5350. Additional disconnect reasons and states information was added.

12.2(2)XB

This command was supported with Cisco IOS Release 12.2(2)XB.

Usage Guidelines

This command displays the operational status of a specific port or range of ports. The port should have an associated active modem session when the command is entered.

Examples

The following example displays operational status for port 1 located in slot 2, with SPE 0 on a Cisco AS5400 with NextPort DFC:

5400# show port operational-status 2/1 Slot/SPE/Port -- 2/0/1 Service Type :Modem service Disconnect Reason Info :0x109 Type (=4 ): Rx (line to host) data flushing - OK Class (=1 ): DSP condition Reason (=9 ): Modem On Hold timeout value reached Modulation Standard :V.34+ TX/RX Bit Rate :31200/14400 Connect Protocol :LAP-M Compression :V.44 Call Timer :47 secs Link Signal Quality :7 SNR :37 dB TX/RX Symbol Rate :3429/3429 TX/RX Carrier Frequency :1959/1959 TX/RX Trellis Coding :16/16 TX/RX Preemphasis Index :0/1 TX/RX Constellation Shaping :On-Active/On-Active TX/RX Nonlinear Encoding :On-Active/On-Active TX/RX Precoding :On-Active/On-Active TX/RX Xmit Level Reduction :3/1 dBm Receive Level :-15 dBm Frequency Offset :0 Hz Phase Jitter Frequency :2 Hz Phase Jitter Level :2 degrees Far End Echo Level :-90 dBm Phase Roll :0 degrees Round Trip Delay :0 msecs Total Retrains :0 Self Test Error count :0 EC Retransmission count :0 EC packets transmitted/received OK :11/12 EC packets (Received BAD/ABORTED) :0 Characters transmitted/received :76/13 Characters received BAD :0 PPP/SLIP packets transmitted/received :0/0 PPP/SLIP packets received (BAD/ABORTED) :0 Total Speedshifts : 0 Total MOH Time : 0 secs Current MOH Time : 0secs MOH Status : MOH Off MOH Count : 0 MOH Request Count : 0 Call Waiting Retrains: 0 DC Encoder,Decoder State:Compressed, Compressed DC Tx,Rx Compression Ratio:0.00:1, 0.00:1 DC Tx,Rx Dictionary Reset Count:0, 0 Diagnostic Code:00 00 00 00 00 00 00 00 RBS Pattern :0 Digital Pad :0 Digital Pad Compensation :0

The following example displays operational status for a V.110 digital service for the Cisco AS5400 on slot 2, SPE 3, port 23:

Router# show port operational-status 2/23 slot/spe/Port -- 2/3/23 Service Type : Digital service Connect Protocol : V110 Data Bits : 8 Parity : 0 Stop Bits : 1 TX/RX Bit Rate : 19200/19200 Call Timer : 116 secs EC packets transmitted/received OK : 0/0 EC packets (Received BAD/ABORTED) : 0 PPP/SLIP packets transmitted, received : 8/8 PPP/SLIP packets received (BAD/ABORTED) : 0 Sync Loss : 0

The following example shows output from the show port operational-status command for the Cisco AS5800 on shelf 1, slot 8:

Router# show port operational-status 1/8 Shelf/Slot/SPE/Port -- 1/8/32/194 Service Type : Modem service Disconnect Reason Info : 0x0 Type (=0 ): <unknown> Class (=0 ): Other Reason (=0 ): no disconnect has yet occurred Modulation Standard : V.34+ TX/RX Bit Rate : 31200/31200 Connect Protocol : LAP-M Compression : V.42bis Call Timer : 18 secs Link Signal Quality : 6 SNR : 38 dB TX/RX Symbol Rate : 3429/3429 TX/RX Carrier Frequency : 1959/1959 TX/RX Trellis Coding : 16/16 TX/RX Preemphasis Index : 0/1 TX/RX Constellation Shaping : Off-None/On-Active TX/RX Nonlinear Encoding : Off-None/On-Active TX/RX Precoding : Off-None/On-Active TX/RX Xmit Level Reduction : 6/5 dBm Receive Level : -15 dBm Frequency Offset : 0 Hz Phase Jitter Frequency : 5 Hz Phase Jitter Level : 2 degrees Far End Echo Level : -90 dBm Phase Roll : 0 degrees Round Trip Delay : 1 msecs Total Retrains : 0 Self Test Error count : 0 EC Retransmission count : 1 EC packets transmitted/received OK : 34/14 EC packets (Received BAD/ABORTED) : 0 Characters transmitted/received : 9393/355 Characters received BAD : 0 PPP/SLIP packets transmitted/received : 0/0 PPP/SLIP packets received (BAD/ABORTED) : 0 RBS Pattern : 0 Digital Pad : 0 Digital Pad Compensation : 0 . . .

Table 6 describes the significant fields shown in the displays.


Table 6: show port operational-status Field Descriptions
Field Description

Slot/SPE/Port

Displays the slot and port designation for the SPE card location.

Service type

Indicates the type of service; data, fax, or voice.

Disconnect Reason Info

The reason for disconnect is displayed.

Modulation Standard

Modulation standard can be V.21, Bell103, V.22, V.22bis, Bell 212, V.23, V.32, V.32bis, V.32terbo, V.34, V.34+, or K56Flex 1.1.

Connect Protocol

Connect protocol for the current session, which can be SYNC mode, ARA1.0, ARA2.0, LAP-M, MNP, FAX mode, SS7/COT, or V.110.

Compression

Compression protocol used for the current connection, which can be None, V.42bis TX, V.42bis RX, V.42bis both, or MNP5 data compression.

Count. Characters transmitted/received

Count of total characters received and transmitted for SYNC/ASYNC connections.

Digital Pad

A digital pad can be implemented by the CO in order to attenuate a "hot" signal. Compensation boosts the signal the amount of the pad. Values can range from 0 to 7dB, with typical values being 0, 3, and 6dB. It is mandatory for K56Flex, but configurable for V.90 via S52. K56Flex only supports 0, 3, and 6 dB. V.90 supports steps of 1/8192 dB, but it is reported to the host insteps of 1/8 dB granularity.

Digital Pad Compensation

Compensation of padding detected in the network.

EC packets transmitted/received OK

EC packets transmitted is the number of TX frames that the client modem accepted. EC packets received is the number of data RX frames accepted.

EC packets (Received BAD/ABORTED)

This is identical to EC Retransmission.

EC Retransmission count

The number of times Nextport has gone into error recovery in the TX direction for a particular connection. The bigger the number, the worse the connection. However, this parameter should be weighed against the count produced by EC packets transmitted and received in order to determine if there should really be a concern.

Far End Echo Level

Over long connections, an echo is produced by impedance mismatches at 2 wire to 4 wire as well as 4 wire to 2 wire hybrid circuitry. The far end echo level (that portion of the transmitted analog signal that has bounced off of the remote modem's analog front end) may range from 0 to -90 in dBm.

Frequency Offset

It is the difference between the modulation carriers (frequency shift in the receive spectrum) between the expected RX carrier frequency and the actual RX carrier frequency.

Link Signal Quality

Measure of line quality for a given bit rate where 0 is the worst and 3 is steady state. If a 1 or 2 is present, the modem must shift down to a lower rate. Likewise, if the Sq value is 4 to 7, the modem speeds shift up to a higher rate. If the Sq value is high (for example, 7) and the bit rate is low, then there may be a problem at the remote end receiver.

Modulation Standard

Modulation standard that can be V.21, Bell03, V.22, V.22bis, Bell212, V.23, V.32, V.32bis, V.32terbo, V.34, V.34+, K56Flex, or V.90.

Phase Jitter Frequency

Peak to peak differential between two signal points. Uncanceled phase jitter looks like "rocking" of the baseband QAM constellation. The points look like arcs with the outer points having longer arcs.

Phase Jitter Level

Amount of phase jitter measured and indicates how large the "rocking" is in degrees. On an oscilloscope, the constellation points would look like crescent moons. Values can range up to 15 degrees. The typical value is zero (that is, phase jitter is not normally present).

Phase Roll

Phase roll effects the echo signal coming back. A certain constellation pattern is transmitted from a modem and makes it to the central office. Some echoed form of this signal/constellation pattern is sent back. However, the constellation shape may be rotated from 0-359 degrees. This rotation is called the phase roll.

PPP/SLIP packets transmitted/received

Total count of PPP/SLIP packets transmitted and received. This total could include all PPP/SLIP packets, including BAD/ABORTED packets.

PPP/SLIP packets received (BAD/ABORTED)

Total count of the bad or aborted PPP/SLIP packets, which is a subset of PPP/SLIP packets received. A counted PPP packet has a bad FCS, or the SLIP packet has a transparency error.

RBS Pattern

Reports the number of robbed bits detected in the connection. The robbed bits are used for inband signalling. This information is only reported for K56Flex (by the analog modem) and is only found on a channelized line such as T1 or E1. The 6 LSBs of the returned value indicate the periodic RBS pattern where a 1 denotes a pulse code modulation (PCM) sample with a robbed bit.

Receive Level

This is the power of the received signal and ranges from 0 to -128 in dBm steps. Typically the range in the United States is about -22 dBm, and in Europe is -12 dBm. A good range is from -12 dBm to -24 dBm.

Round Trip Delay

Total round trip propagation delay of the link (in milliseconds). This is important for proper echo cancellation. The amount that the delay varies on the network.

Self Test Error count

Total errors generated during a self-test run.

SNR

The ratio measurement of the desired signal to noise. This value can range from 0 to 70 dB and changes in 1 dB steps. Note that a 28.8-kbps connection demands an SNR of about 37 dB. Lower than this and the quality of the connection diminishes. A 33.6-kbps connection demands an SNR of 38 to 39 dB. Also note that a "clean" line has an SNR of about 41 dB.

Total Retrains

Count of total retrains and speed shifts.

TX/RX Bit Rate

TX is the bit rate from the local DCE to the remote DCE. RX is the bit rate from the remote DCE to the local DCE. These rates may be asynchronous

TX/RX Carrier Frequency

For TX, carrier frequency used by the local DCE. For RX, carrier frequency used by the remote DCE.

TX/RX Symbol Rate

TX is symbol rate used to send samples to the line. RX is the symbol rate used to receive samples off of the line. The rates are synchronous with each other.

TX/RX Trellis Coding

Adds dependency between symbols in order to make the detection in noise more robust (Forward Error Correction). Modems may use 8 (V.32, V.32bis, V.17), 16, 32, 64 (V.34, V.34+, V.90, K56flex), or no trellis coding (V.22, V.22bis, V.21, Bell212, Bell103, V.29, V.27).

TX/RX Pre emphasis Index

Involves shaping the raw transmit spectrum in order to deal with spectrum roll-offs. The pre-emphasis index can take on the values 0 to 10. A zero denotes no reshaping. Typical values usually fall in the ranges 0 to 2 or 6 to 7. This technique is used with V.34 and V.34+ standards.

TX/RX Constellation Shaping

A method for improving noise immunity by using a probability distribution for transmitted signal points. The signal states used to predict the sensitivity to certain transmission impairments. Values may be either none or active. This technique is used with V.34 and V.34+ standards.

TX/RX Nonlinear Encoding

Occurs during the training phase and moves the constellation's outer points away in order to deal with nonlinear distortion. Nonlinear distortion (0-200Hz) tends to effect the higher power signals. Moving the outer constellation points out reduces the chance of error. Values may be either none or active. MICA modems support nonlinear coding in both directions. This technique is used with V.34 and V.34+ standards.

TX/RX Precoding

Serves the same purpose as the pre-emphasis index but instead manages the bits and not the raw transmit signals. This is done only when asked and therefore will occur in the RX mode. The values may be either none or active. This technique is used with V.34 and V.34+ standards.

TX/RX Xmit Level Reduction

Effects the transmit signal with 0 to 15 in dBm of reduction. If nonlinear distortion is detected, the modem prompts the client for a lower-powered TX signal. If the remote end detects nonlinear distortion, it may ask us to lower our TX signal. This technique is used with V.34 and V.34+ standards.

Related Commands

Command Description

port modem startup-test

Performs diagnostic testing for all modems.

port modem autotest

Enables modem autotest. Automatically and periodically performs a modem diagnostics test for modems inside the access server or router.

show spe modem active

Displays active modem statistics of all SPEs, a specified SPE, or the specified SPE range.

show spe modem active

To display the modem service statistics of all active calls on specified service processing elements (SPEs), use the show spe modem active command in privileged EXEC mode.

Cisco AS5400 with NextPort DFC

show spe modem active {slot | slot/spe}

Cisco AS5800 with Universal Port Card

show spe modem active {shelf/slot | shelf/slot/spe}

Syntax Description

slot

All ports on the specified slot. For the AS5400, slot values range from 0 to 7.

slot/spe

All ports on the specified slot and SPE. For the AS5400, slot values range from 0 to 7 and SPE values range from 0 to 17.

shelf/slot

All ports on the specified shelf and slot. For the AS5800, shelf values range from 0 to 1 and UPC slot values range from 2 to 11.

shelf/slot/spe

All ports on the specified SPE. For the AS5800, shelf values range from 0 to 1, slot values range from 2 to 11, and SPE values range from 0 to 53.

Defaults

No default behavior or values

Command Modes

Privileged EXEC

Command History

Release Modification

12.1(1)XD

This command was introduced on the Cisco AS5400.

12.1(3)T

This command was supported on the Cisco AS5400 and Cisco AS5800.

12.2(2)XA

This command was supported on the Cisco AS5350.

12.2(2)XB

This command was supported with Cisco IOS Release 12.2(2)XB.

Examples

The following is sample output from the show spe modem active command on the Cisco AS5400 with NextPort DFC.This example displays active modem statistics for slot 5, SPE 6:

Router# show spe modem active 5/6 SPE 5/06 Port Type Prot Comp Duration Tx/Rx Tx/Rx(Lvl) SNR Cfg Retrain 37 V.90 LAP-M V.42bis 95 3890/76 --/-11 38 In 0

The following is sample output from the show spe modem active command on the Cisco AS5800 with universal port card. This example displays active modem statistics for shelf 1, slot 8:

Router# show spe modem active 1/8 SPE 1/08/34 Port Type Prot Comp Duration Tx/Rx(bps) Tx/Rx(Lvl) SNR Cfg Retrain 209 V.34+ LAP-M V.42bis 23 28800/31200 --/-13 37 In 0 SPE 1/08/35 Port Type Prot Comp Duration Tx/Rx(bps) Tx/Rx(Lvl) SNR Cfg Retrain 215 V.34+ LAP-M V.42bis 12 28800/31200 --/-13 37 In 0 SPE 1/08/36 Port Type Prot Comp Duration Tx/Rx(bps) Tx/Rx(Lvl) SNR Cfg Retrain 216 V.34+ LAP-M V.42bis 24 33600/31200 --/-36 38 In 0 217 ## ## ## 0 33600/300 --/19 37 In 0 218 ## ## ## 0 33600/300 --/19 37 In 0 219 ## ## ## 0 33600/300 --/19 35 In 0

Related Commands

Command Description

show port operational-status

Displays the operational status of a specific port or range of ports.

show spe

Displays history statistics of all SPEs, a specified SPE, or a specified range of SPEs.

show spe modem csr

To display the call success rate (CSR) for the specified service processing elements (SPEs), use the
show spe modem csr command in privileged EXEC mode.

Cisco AS5400 with NextPort DFC

show spe modem csr {summary | slot | slot/spe}

Cisco AS5800 with universal port card

show spe modem csr {summary | shelf/slot | shelf/slot/spe}

Syntax Description

summary

Shows all call success rate statistics for all SPEs.

slot

All ports on the specified slot. For the AS5400, slot values range from 0 to 7.

slot/spe

All ports on the specified slot and SPE. For the AS5400, slot values range from 0 to 7 and SPE values range from 0 to 17.

shelf/slot

All ports on the specified shelf and slot. For the AS5800, shelf values range from 0 to 1 and UPC slot values range from 2 to 11.

shelf/slot/spe

All ports on the specified SPE. For the AS5800, shelf values range from 0 to 1, slot values range from 2 to 11, and SPE values range from 0 to 53.

Defaults

No default behavior or values

Command Modes

Privileged EXEC

Command History

Release Modification

12.1(1)XD

This command was introduced on the Cisco AS5400.

12.1(3)T

This command was supported on the Cisco AS5400 and Cisco AS5800.

12.2(2)XA

This command was supported on the Cisco AS5350.

12.2(2)XB

This command was supported with Cisco IOS Release 12.2(2)XB.

Usage Guidelines

The show spe modem csr command displays the modem call success rate statistics for a specific SPE, range of SPEs, or all SPEs. The summary keyword displays the call success rate statistics for all SPEs.

Examples

The following example shows output for the show spe modem csr summary command on the Cisco AS5400 with NextPort dial feature card (DFC):

Router# show spe modem csr summary Avg Hold Inc calls Out calls Failed No Succ Time Succ Fail Avail Succ Fail Avail Dial Answer Pct 00:00:44 1 0 216 0 0 216 0 0 100%%

The following is sample output from the show spe modem csr summary command on the Cisco AS5800 with universal port card:

Router# show spe modem csr summary Avg Hold Inc calls Out calls Failed No Succ Time Succ Fail Avail Succ Fail Avail Dial Answer Pct 002631 4827 285 93 0 0 93 5 0 94%

Related Commands

Command Description

show port operational-status

Displays the operational status of a specific port or range of ports.

show spe

Displays history statistics of all service processing elements (SPEs), a specified SPE, or a specified range of SPEs.

show spe modem disconnect-reason

To display all modem disconnect reasons for the specified service processing element (SPE), use the
show spe modem disconnect-reason command in privileged EXEC mode.

Cisco AS5400 with NextPort DFC

show spe modem disconnect-reason {summary | slot | slot/spe}

Cisco AS5800 with universal port card

show spe modem disconnect-reason {summary | shelf/slot | shelf/slot/spe}

Syntax Description

summary

Shows the disconnect reasons for all SPEs.

slot

All ports on the specified slot. For the AS5400, slot values range from 0 to 7.

slot/spe

All ports on the specified slot and SPE. For the AS5400, slot values range from 0 to 7 and SPE values range from 0 to 17.

shelf/slot

All ports on the specified shelf and slot. For the AS5800, shelf values range from 0 to 1 and UPC slot values range from 2 to 11.

shelf/slot/spe

All ports on the specified SPE. For the AS5800, shelf values range from 0 to 1, slot values range from 2 to 11, and SPE values range from 0 to 53.

Defaults

No default behavior or values

Command Modes

Privileged EXEC

Command History

Release Modification

12.1(1)XD

This command was introduced on the Cisco AS5400.

12.1(3)T

This command was supported on the Cisco AS5400 and Cisco AS5800.

12.2(2)XA

This command was supported on the Cisco AS5350. Additional output reporting was added to the Class Other and Class DSP categories.

12.2(2)XB

This command was supported with Cisco IOS Release 12.2(2)XB.

Usage Guidelines

The disconnect reasons are displayed with Class boundaries.

Examples

The following example shows output for the show spe modem disconnect-reason summary command on the Cisco AS5400 with NextPort dial feature card (DFC).

Router# show spe modem disconnect-reason 1/0 ===CLASS OTHER==== ====CLASS DSP===== ====CLASS HOST==== ===CLASS EC LCL=== Software Rst 0 No Carrier 0 Hst NonSpec 0 No LR 0 EC Termntd 0 No ABT dtctd 0 Hst Busy 0 LR Param1 0 Bad MNP5 Rx 0 Trainup flr 0 Hst No answr 0 LR Incmpt 0 DC General 0 Retrain Lt 0 Hst DTR 0 Retrns Lt 0 Bad COP stat 0 ABT end flr 0 Hst ATH 0 Inactivity 0 ATH 0 COT Ack 0 Hst NoDialTn 0 Protocol Err 0 Aborted 0 COT Nak 1 0 Hst No Carr 0 Fallbck Term 0 Connect Tout 0 COT Nak 2 0 COT Off 0 No XID 0 Reset DSP 0 MOH Clr Down 0 COT Timeout 0 XID Incmpt 0 DC Codeword 0 MOH Timeout 0 Hst Ack 0 Disc 0 DC Empty Nd 0 DM 0 DC Large Tok0 ===CLASS EC LD==== ==CLASS EC FRMR=== Bad NR 0 DC Reserved0 LD No LR 0 Frmr Bad Cmd 0 SABME Online 0 DC Char Size 0 LD LR Param1 0 Frmr Data 0 XID Online 0 DC Rx Dict 0 LD LR Incmpt 0 Frmr Length 0 LR Online 0 DC Rx Hist 0 LD Retrns Lt 0 Frmr Bad NR 0 DC Rx String 0 LD Inactivty 0 =====N O N E====== DC Negotiate0 LD Protocol 0 ===CLASS EC CMD=== None 0 DC Compress 0 LD User 0 Bad Cmd 0 TOTAL 0

The following is sample output from the show spe modem disconnect-reason summary command on the Cisco AS5800 with universal port card:

Router# show spe modem disconnect-reason summary ===CLASS OTHER==== =====CLASS DSP==== ===CLASS EC LCL=== ==CLASS EC FRMR=== Software Rst 0 No Carrier 21 No LR 0 Frmr Bad Cmd 0 EC Termntd 0 No ABT dtctd 0 LR Param1 0 Frmr Data 0 Bad MNP5 Rx 0 Trainup flr 26 LR Incmpt 0 Frmr Length 0 Bad V42B 12 Retrain Lt 0 Retrns Lt 37 Frmr Bad NR 0 Bad COP stat 0 ABT end flr 0 Inactivity 0 ATH 0 Protocol Err 5 ===CLASS EC LD==== Aborted 0 ====CLASS HOST==== Fallbck Term 22 LD No LR 0 Connect Tout 11 Hst NonSpec 799 No XID 5 LD LR Param1 0 Reset DSP 0 Hst Busy 0 XID Incmpt 0 LD LR Incmpt 0 Hst No answr 0 Disc 2718 LD Retrns Lt 0 ===CLASS EC Cmd=== Hst DTR 870 DM 0 LD Inactivty 0 Bad Cmd 0 Hst ATH 0 Bad NR 0 LD Protocol 0 Hst NoDialTn 0 SABME Online 0 LD User 0 =====N O N E====== Hst No Carr 0 XID Online 0 None 29 Hst Ack 0 LR Online 0 TOTAL 4555

Related Commands

Command Description

show spe

Displays history statistics of all service processing elements (SPEs), a specified SPE, or a specified range of SPEs.

show spe modem summary

Displays summary of modem statistics for the specified SPE or a specified range of SPEs.

show spe modem summary

To display summary of modem statistics for the specified service processing element (SPE) or range of SPEs, use the show spe modem summary command in privileged EXEC mode.

Cisco AS5400 with NextPort DFC

show spe modem summary [slot | slot/spe]

Cisco AS5800 with universal port card

show spe modem summary [shelf/slot | shelf/slot/spe]

Syntax Description

slot

(Optional) All ports on the specified slot. For the AS5400, slot values range from 0 to 7.

slot/spe

(Optional) All ports on the specified slot and SPE. For the AS5400, slot values range from 0 to 7 and SPE values range from 0 to 17.

shelf/slot

(Optional) All ports on the specified shelf and slot. For the AS5800, shelf values range from 0 to 1 and UPC slot values range from 2 to 11.

shelf/slot/spe

(Optional) All ports on the specified SPE. For the AS5800, shelf values range from 0 to 1, slot values range from 2 to 11, and SPE values range from 0 to 53.

Defaults

No default behavior or values

Command Modes

Privileged EXEC

Command History

Release Modification

12.1(1)XD

This command was introduced on the Cisco AS5400.

12.1(3)T

This command was supported on the Cisco AS5400 and Cisco AS5800.

12.2(2)XA

This command was supported on the Cisco AS5350.

12.2(2)XB

This command was supported with Cisco IOS Release 12.2(2)XB.

Examples

The following example displays the show spe modem summary command on the Cisco AS5400.

Router# show spe modem summary Async1/00 - 3/107, TTY216 - 539 1 incoming completes 0 incoming failures 0 outgoing completes 0 outgoing failures 0 failed dial attempts 0 ring no answers 0 autotests 0 no carriers 0 dial timeouts 0 autotest fails 0 no dial tones 0 link failures 0 fail count 0 watchdog timeouts 0 protocol errors 0 recovers Transmit Speed Counters : Speed Calls Speed Calls Speed Calls Speed Calls Speed Calls 60000 0 48000 0 38400 0 30666 0 12000 0 58000 0 46666 0 38000 0 29333 0 9600 0 56000 0 46000 0 37333 0 28800 0 7200 0 54666 0 45333 0 36000 0 28000 0 4800 0 54000 0 44000 0 34666 0 26400 0 2400 0 53333 0 42666 0 34000 0 24000 0 1200 0 52000 0 42000 0 33600 0 21600 0 300 0 50666 0 41333 0 33333 0 19200 0 50000 0 40000 0 32000 0 16800 0 49333 0 38666 0 31200 0 14400 0 Receive Speed Counters : Speed Calls Speed Calls Speed Calls Speed Calls Speed Calls 38400 0 26400 0 16800 0 7200 0 300 0 33600 0 24000 0 14400 0 4800 0 31200 0 21600 0 12000 0 2400 0 28800 0 19200 0 9600 0 1200 0

The following is sample output from the show spe modem summary command on the Cisco AS5800.

Router# show spe modem summary Async1/2/00 - 1/3/323, TTY972 - 1619 4827 incoming completes 284 incoming failures 0 outgoing completes 0 outgoing failures 0 failed dial attempts 0 ring no answers 0 autotests 0 no carriers 11 dial timeouts 0 autotest fails 0 no dial tones 0 link failures 0 fail count 0 watchdog timeouts 2787 protocol errors 0 recovers Transmit Speed Counters Speed Calls Speed Calls Speed Calls Speed Calls Speed Calls 60000 0 48000 432 38400 0 30666 0 12000 143 58000 0 46666 0 38000 4 29333 0 9600 5 56000 15 46000 56 37333 111 28800 700 7200 11 54666 0 45333 299 36000 84 28000 5 4800 2 54000 0 44000 227 34666 0 26400 267 2400 0 53333 123 42666 0 34000 39 24000 46 1200 3 52000 563 42000 68 33600 323 21600 27 300 0 50666 0 41333 38 33333 9 19200 38 50000 59 40000 65 32000 20 16800 12 49333 371 38666 0 31200 654 14400 5 Receive Speed Counters Speed Calls Speed Calls Speed Calls Speed Calls Speed Calls 38400 0 26400 2286 16800 11 7200 1 300 2 33600 113 24000 267 14400 139 4800 1 31200 216 21600 56 12000 4 2400 3 28800 1665 19200 47 9600 16 1200 0

Related Commands

Command Description

show port operational-status

Displays the operational status of a specific port or range of ports.

show spe

Displays history statistics of all service processing elements (SPEs), a specified SPE, or a specified range of SPEs.

Glossary

CLI—command-line interface.

CSMv6—Mindspeed modem hardware solution.

CSR—call success rate.

DFC—dial feature card.

DSP—Digital Signal Processor. Microprocessor on which the modulation/demodulation process is carried out.

ISP—Internet service provider.

ITU-T—International Telecommunication Union Telecommunication Standardization Sector.

LZJH—Lempel-Ziv-Jeff-Heath data compression algorithm used in V.44.

MICA—Modem ISDN channel aggregation. Used as a generic term to describe the Dial Technology Division (DTD) high-density modem technology.

MOH—Modem on Hold functionality specified in V.92.

NextPort—Device driver architecture for Cisco IOS software that supports the NextPort hardware and software interfaces. Supports the Universal Port concept.

PCM—pulse code modulation.

PPP—Point-to-Point Protocol.

PSTN—Public Switched Telephone Network.

SPE—service processing element.

universal port—Concept of a single device that can terminate one digital signaling level zero (DS0) with a data modem, fax modem, ISDN, or voice solution.

QC—Quick Connect functionality specified in V.92.

V.44—ITU modem standard for LZJH data compression algorithm.

V.92—ITU modem standard that contains Quick Connect and Modem On Hold.

VSA—vendor specific attribute (RADIUS).


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Posted: Fri Apr 5 16:13:59 PST 2002
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