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Feature History
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.
Release
Modification
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:
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. |
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:
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.
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 |
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:
Note Although the integer attribute values can be specified as any value in a contiguous range, V.92 specifications limit configuration to a limited set of values. Attribute values are rounded down to the next permitted value when they are used to configure a modem. |
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. |
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.
The following modem enhancements have been made for the implementation of the
V.92 Modem on Hold feature:
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.
Name | Description |
---|---|
DR_MOH_CLRD | Modem On Hold cleardown by modem |
DR_MOH_TIMEOUT | Modem On Hold timeout value reached |
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
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 |
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.
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.
V.92 Modem on Hold is supported on the following firmware and software:
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.
Note Many client modems used in Europe are known to have problems with the Modem on Hold feature. The vendors are aware of the issue and are working to correct it. If you are having trouble with the Modem on Hold feature in Europe, it is suggested that the customer contact the client modem vendor to verify that the modem complies with the telephony signaling for call waiting, caller ID, and 3-way calling in their particular country. |
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.
None
For additional information, refer to the following documents:
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. |
None
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.
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
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.
Release
Modification
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
Displays the detailed data stored within Call Tracker for a specific call having specified unique call handle identifier. Displays all the information stored within the Call Tracker history database table for the most recent disconnected calls.
Command
Description
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
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.
Release
Modification
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
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
Displays the operational status of the specified ports or a specified range of ports.
Command
Description
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
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.
Release
Modification
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.
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
port modem startup-test Performs diagnostic testing for all modems. Enables modem autotest. Automatically and periodically performs a modem diagnostics test for modems inside the access server or router. Displays active modem statistics of all SPEs, a specified SPE, or the specified SPE range.
Command
Description
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
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.
Release
Modification
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.
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
port modem startup-test Performs diagnostic testing for all modems. Enables modem autotest. Automatically and periodically performs a modem diagnostics test for modems inside the access server or router. Displays active modem statistics of all SPEs, a specified SPE, or the specified SPE range.
Command
Description
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
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.
Release
Modification
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
Displays the operational status of a specific port or range of ports. Displays history statistics of all SPEs, a specified SPE, or a specified range of SPEs.
Command
Description
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
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.
Release
Modification
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
Displays the operational status of a specific port or range of ports. Displays history statistics of all service processing elements (SPEs), a specified SPE, or a specified range of SPEs.
Command
Description
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
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.
Release
Modification
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
Displays history statistics of all service processing elements (SPEs), a specified SPE, or a specified range of SPEs. Displays summary of modem statistics for the specified SPE or a specified range of SPEs.
Command
Description
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
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.
Release
Modification
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
Displays the operational status of a specific port or range of ports. Displays history statistics of all service processing elements (SPEs), a specified SPE, or a specified range of SPEs.
Command
Description
CLIcommand-line interface.
CSMv6Mindspeed modem hardware solution.
CSRcall success rate.
DFCdial feature card.
DSPDigital Signal Processor. Microprocessor on which the modulation/demodulation process is carried out.
ISPInternet service provider.
ITU-TInternational Telecommunication Union Telecommunication Standardization Sector.
LZJHLempel-Ziv-Jeff-Heath data compression algorithm used in V.44.
MICAModem ISDN channel aggregation. Used as a generic term to describe the Dial Technology Division (DTD) high-density modem technology.
MOHModem on Hold functionality specified in V.92.
NextPortDevice driver architecture for Cisco IOS software that supports the NextPort hardware and software interfaces. Supports the Universal Port concept.
PCMpulse code modulation.
PPPPoint-to-Point Protocol.
PSTNPublic Switched Telephone Network.
SPEservice processing element.
universal portConcept of a single device that can terminate one digital signaling level zero (DS0) with a data modem, fax modem, ISDN, or voice solution.
QCQuick Connect functionality specified in V.92.
V.44ITU modem standard for LZJH data compression algorithm.
V.92ITU modem standard that contains Quick Connect and Modem On Hold.
VSAvendor specific attribute (RADIUS).
Posted: Fri Apr 5 16:13:59 PST 2002
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