VOIP Trunking

VoIP Trunking Mode

The Voice over IP (VoIP) trunking feature allows the VISM card to connect to the PBX, or central office digital systems. VISM uses T1/E1 digital interfaces, converts the TDM bit stream into Real-time Transport Protocol (RTP) packets after echo cancellation and compression, and transports the bits over the IP network.

No call agent is required for setting up and tearing down calls.

This section contains the following tasks for configuring the VISM/VISM-PR card for VoIP trunking:

• Configuring the Operating Mode

• Configuring the ATM Network Side

• Configuring Domain Names and IP Addresses

• Configuring TDM Side Signaling for Applications That Use CCS

• Configuring TDM Side Signaling for Applications That Use CAS

• Adding DS0 Endpoints to Lines

• Adding RTP Connections

Sample VoIP trunking configurations are shown in the "Sample Configuration" section.

Configuring the Operating Mode

To configure your VISM/VISM-PR card for the VoIP trunking mode, complete the following steps:

Step 1 To configure the VISM/VISM-PR operating mode, enter the cnfvismmode command.

nodename.1.28.VISM8.a > cnfvismmode <mode_number>

Replace <mode_number> with value of 1.

•1 = VoIP switching/VoIP trunking (default)

•2 = AAL2 trunking

•3 = AAL1 switching

•7 = Switched AAL2 SVC

•8 = Switched AAL2 PVC

•9 = VoIP and AAL1 SVC

•10 = VoIP trunking and AAL2 trunking

Step 2 Type a y at the following message:

WARNING: Available CLI Commands will be changed, do you want to proceed (Yes/No)? y

A message about the number of available commands displays before the card returns the prompt. The following example shows the number of available commands for the VoIP trunking mode:

INFORMATION: The new 'voipSwitching' mode has 355 CLI commands.

Step 3 To display the current VISM/VISM-PR operating mode, enter the dspvismparam command.

nodename.1.28.VISM8.a > dspvismparam

VISM mode:                   voipSwitching/voipTrunking

VISM features Bit Map:       0x5bc

FunctionModuleType:          VISM-PR-8T1

CAC flag:                    enable

DS0s available:              192

Template number:             2

Percent of functional DSPs:  100

IP address:                  10.31.19.99

Subnet mask:                 255.255.255.0

Bearer IP address:           0.0.0.0

Bearer Subnet mask:          0.0.0.0

RTCP report interval:        5000 msec

RTCP receive multiplier:     3

RTP receive timer:           disable

ControlPrecedence/Tos:       0x60

BearerPrecedence/Tos:        0xa0

Aal2 muxing status:          disable

Tftp Server Dn               TFTPDOMAIN

Aggregate Clipping           enable

Aggregate Svc Bandwidth      0

Type <CR> to continue, Q<CR> to stop:

Codec negotiation option     1

Profile negotiation option   1

VAD Duty Cycle               61

VAD Tolerance                100

VISM Initiated NW COT        Off

VISM CO4 Timer               1000 msec

CALEA flag                   disable

SupportdModuleType:          VISM-PR-8T1.

VismNSAP:                    47009181000000000142265b99000001079bff00

Configuring the ATM Network Side

Configuring the ATM network side consists of setting up ATM PVCs across the network and providing the mechanism by which calls are routed over the correct PVC.

The Voice over IP trunking operating mode requires you to set up an AAL5 PVC for bearer transmission between the VISM/VISM-PR card and the PXM card or RPM. The router extracts the IP frames from the ATM cells and routes the frames.

If ISDN signaling is used, a separate control PVC might also be required.

Use the following guidelines when you set up the ATM side in the VoIP trunking mode.

•The master and slave connection base parameters, PCR, SCR, and MBS values must match.

If these values do not match, PXM1E and PXM45 cards display an error. PXM1 cards do not display an error.

•If the connections are through a physical loopback on an OC-3, make sure that the VPI and VCI values are the same on both ends of the loopback.

Complete the following tasks to configure the ATM side:

• Configuring PVC Connections

• Connection CAC Configuration

Configuring PVC Connections

The VoIP trunking mode has the following two types of PVCs:

•AAL5 Bearer PVCs—Support both bearer data and control data.

•Control PVCs—Support only control data.

Complete the following steps to configure PVC connections:

Note You must add the slave connection first before adding the master connection. Retain the remote connection ID to use when setting up the master connection.

Step 1 To add an ATM PVC between the VISM/VISM-PR card and the MGX 8000 Series platform PXM card, enter the addcon command.

nodename.1.28.VISM8.a > addcon <localVCI> <preference> <pvcType> <application> <PCR> 
<mastership> |<remoteConnId> <serviceType> <scr> <mbs> <priority> <prefrte> <direct>|

Replace the above arguments with the values listed in Table 8-1.

Table 8-1 Parameters for addcon Command
Parameter	Description
localVCI	Local virtual channel identifier (VCI) to be used for the connection. Range is 131-510. The value you enter for this argument is also used as the LCN.
preference	Preference level of the local VCI. •1 = Primary •2 = Secondary Note If you have two PVCs for redundancy, one PVC is primary; one PVC is secondary.
pvcType	AAL type of connection. •1 = AAL5 (For control and bearer trunking) •2 = AAL2 •3 = AAL1
application	The connection's application. •1 = Control—Use this option for the control channel if you have separate control and bearer PVCs. •2 = Bearer—Use this option if you have one PVC for both bearer and control messages that are going over this PVC. Or, use this option for the bearer PVC when you are using separate control and bearer PVCs. •3 = Signaling
PCR	Peak cell rate (PCR) measured in cells per second. Ranges are •1-96000 for AAL5 bearer •1-20000 for AAL5 control PVC •1-50000 for T1 AAL2 PVCs •1-60000 for E1 AAL2 PVCs •1-400 for signaling PVCs in AAL2 trunking mode Note If the serviceType argument is variable bit rate (VBR), the PCR argument value must be 15 or greater.
mastership	Connection type. •1 = Master •2 = Slave (default)
\|remoteConnId\|	(Optional) Remote connection identifier. For PXM1 connections, specify this argument with the following format: nodename.slot.port.vpi.vci For PXM1E/PXM45, specify this argument with the following format: Nsapaddr.Vpi.Vci Note This argument is used only when the mastership argument is set to 1 (Master).
\|serviceType\|	(Optional) Service type is one of the following values: •1 = Constant bit rate (CBR) •2 = Variable bit rate real time (rt-VBR) •3 = Variable bit rate non-real time (nrt-VBR) •4 = rt-VBR3 •5 = rt-VBR2 •6 = nrt-VBR2 •7 = nrt-VBR3 Note Use value 7 for VISM-PR to RPM-PR connections.
\|scr\|	(Optional) Sustainable cell rate (SCR) defined in cells per second. Range is from 15 to the value you configured for the PCR argument. Note This argument value is required if the serviceType argument value is in the range 2-7.
\|mbs\|	(Optional) Maximum burst size (MBS) is the maximum number of cells transmitted at the peak cell rate. Range is from 1 cell to 10 times the value you configured for the scr argument value. Note This argument value is required if the serviceType argument value is in the range 2-7.
\|priority\|	(Optional) Route priority. Priority number is assigned to the PVC during configuration of the connection. Range is 1-15. Default is 8. A value of 1 indicates highest priority, and a value of 15 indicates the lowest priority. Note This parameter is applicable only to VISM-PR cards.
\|prefrte\|	(Optional) Unique identifier of the preferred route to which this connection is associated. Range is 0-65535. Default is 0. When the specified route identifier is 0, the connection is not associated with a preferred route. This parameter is not applicable to the slave end of an SPVC connection. Note This parameter is applicable only to VISM-PR cards.
\|direct\|	(Optional) Parameter to specify whether or not the associated preferred route is the only permissible route for the connection to take. •1 = Yes—The connection is not allowed to pick an alternate route. This option is not applicable when a preferred route is not specified. •2 = No (default)—The connection is allowed to try another alternate route if the preferred route is unavailable. If the directed preferred route is unavailable, the connection fails. Note This parameter is applicable only to VISM-PR cards.

Step 2 If you need to refine the configuration parameters of the connection added in Step 1, enter the cnfcon command.

nodename.1.28.VISM8.a > cnfcon <LCN> <PCR> <service_type> |<SCR_ingress> <MBS_ingress> 
<priority> <prefrte> <direct>|

Replace the above arguments with the values listed in Table 8-2.

Table 8-2 Parameters for cnfcon Command
Parameter	Description
LCN	Type the value you entered for the localVCI argument in Step 1.
PCR	PCR described in cells per second. Note The PCR argument value cannot be changed if the calls or connections for signaling and control are active. Ranges are •1-400 = Signaling PVCs in AAL2 trunking mode •1-20000 = AAL5 control PVC •1-50000 = T1 AAL2 bearer PVCs •1-60000 = E1 AAL2 bearer PVCs •1-96000 = AAL5 bearer PVC Note If the service_type argument value is a VBR, the PCR argument value must be 15 or greater.
service_type	Service type. Values are •1 = Constant bit rate (CBR) •2 = Variable bit rate real time—rt-VBR •3 = Variable bit rate non-real time—nrt-VBR •4 = rt-VBR3 •5 = rt-VBR2 •6 = nrt-VBR •7 = nrt-VBR Note For VISM-PR to RPM-PR connections, use one of the values 4-7.
\|SCR_ingress\|	(Optional) SCR. Range is from 15 to the value you configured for the PCR argument. Note This argument value is required if the service_type argument value is in the range 2-7.
\|MBS_ingress\|	(Optional) MBS. Maximum number of cells transmitted at the peak cell rate. Range is from 1 cell to 10 times the value you configured for the SCR_ingress argument. Note This argument value is required if the service_type argument value is in the range 2-7.
\|priority\|	(Optional) Route priority is the priority number assigned to the PVC during configuration of the connection. Range is 1-15. Default is 8. A value of 1 indicates highest priority, and a value of 15 indicates the lowest priority. Note This parameter is applicable only to VISM-PR cards.
\|prefrte\|	(Optional) Unique identifier of the preferred route to which this connection is associated. Range is 0-65535. Default is 0. When the specified route identifier is 0, the connection is not associated with a preferred route. This parameter is not applicable to the slave end of an SPVC connection. Note This parameter is applicable only to VISM-PR cards.
\|direct\|	(Optional) Parameter to specify whether or not the associated preferred route is the only permissible route for the connection to take. •1 = Yes—The connection is not allowed to pick an alternate route. This option is not applicable when a preferred route is not specified. •2 = No (Default)—The connection is allowed to try another alternate route if the preferred route is unavailable. If the directed preferred route is unavailable, the connection is failed. Note This parameter is applicable only to VISM-PR cards.

Step 3 To configure primary and secondary PVCs to provide protection in the event of a PVC failure, enter the cnfconprotect command.

nodename.1.28.VISM8.a > cnfconprotect <LCN> <protection> <lock_state> <fallback_LCN>

Replace the above arguments with the values listed in Table 8-3.

Table 8-3 Parameters for cnfconprotect Command
Parameter	Description
LCN	Primary logical channel number of the connection (PVC). Range is 131-510.
protection	Value you can use to enable or disable PVC protection. •1 = Protected •2 = Unprotected
lock_state	PVC lock state. Values are •1 = Unlock •2 = Lock
fallback_LCN	Secondary (fallback) logical channel number of the connection (PVC). Range is 131-510.

Step 4 To display the details of the connection, enter the dspcon command.

nodename.1.11.VISM8.a > dspcon <LCN>

Replace the <LCN> argument with a value in the range 131-510.

The following example shows sample configuration for a bearer PVC in VoIP trunking mode.

mgxa-pxm1e.1.30.VISM8.a > dspcon 132

  ChanNum:                  132

  ChanRowStatus:            Mod

  ChanLocalRemoteLpbkState: Disabled

  ChanTestType:             TestOff

  ChanTestState:            NotInProgress

  ChanRTDresult:            65535 us

  ChanPortNum:              255

  ChanPvcType:              AAL5

  ChanConnectionType:       PVC

  ChanLocalVpi:             30

  ChanLocalVci:             132

  ChanLocalNSAP:            470091810000000007856e136300000107f3ff00

  ChanRemoteVpi:            104

  ChanRemoteVci:            131

  ChanRemoteNSAP:           470091810000000007856e1363000001073b0400

  ChanMastership:           Master

  ChanVpcFlag:              Vcc

  ChanConnServiceType:      CBR

  ChanRoutingPriority:      8

  ChanMaxCost:              2147483647

  ChanRestrictTrunkType:    No Restriction

Type <CR> to continue, Q<CR> to stop:

  ChanConnPCR:              58000

  ChanConnPercentUtil:      100

  ChanPreference:           1

  ChanRemotePCR:            58000

  ChanRemotePercentUtil:    100

  ChanProtection:           unprotected

  ChanActivityState:        unknown

  ChanLockingState:         unlock

  ChanApplication:          bearer

  ChanServiceType:          cbr

  ChanScrIngress:           58000

  ChanMbsIngress:           58000

  ChanVCCI:                 0

  ChanFarEndAddrType:       notapplicable

  ChanFarEndE164Addr:       0

  ChanFarEndGWIDAddr:       .

  ChanFarEndNSAPAddr:       NULL NSAP

  ChanAdminStatus:          Up

  ChanReroute:              False

  ChanPrefRouteId:          0

  ChanDirectRoute:          False

Type <CR> to continue, Q<CR> to stop:

  ChanUserPcrNumber:        User BW Off

  ChanUserMinPCRBW:         10

  ChanUserMaxPCRBW:         58000

  ChanUserMaxScrBW:         0

  ChanUserMaxMbsBW:         0

  ChanNumNextAvailable:  133

The following example shows sample configuration for a signaling connection with CCS.

nodename.1.5.VISM8.a > dspcon 231

  ChanNum:                  231

  ChanRowStatus:            Mod

  ChanLocalRemoteLpbkState: Disabled

  ChanTestType:             TestOff

  ChanTestState:            NotInProgress

  ChanRTDresult:            65535 us

  ChanPortNum:              255

  ChanPvcType:              AAL5

  ChanConnectionType:       PVC

  ChanLocalVpi:             5

  ChanLocalVci:             231

  ChanLocalNSAP:            4700918100000000059a3f9761000001072bff00

  ChanRemoteVpi:            0

  ChanRemoteVci:            0

  ChanRemoteNSAP:           NULL NSAP

  ChanMastership:           Slave

  ChanVpcFlag:              Vcc

  ChanConnServiceType:      CBR

  ChanRoutingPriority:      8

  ChanMaxCost:              2147483647

  ChanRestrictTrunkType:    No Restriction

Type <CR> to continue, Q<CR> to stop:

  ChanConnPCR:              400

  ChanConnPercentUtil:      100

  ChanPreference:           1

  ChanRemotePCR:            400

  ChanRemotePercentUtil:    100

  ChanProtection:           unprotected

  ChanActivityState:        unknown

  ChanLockingState:         unlock

  ChanApplication:          signaling

  ChanServiceType:          cbr

  ChanScrIngress:           400

  ChanMbsIngress:           400

  ChanVCCI:                 0

  ChanFarEndAddrType:       notapplicable

  ChanFarEndE164Addr:       0

  ChanFarEndGWIDAddr:       .

  ChanFarEndNSAPAddr:       NULL NSAP

  ChanAdminStatus:          Up

  ChanReroute:              False

  ChanPrefRouteId:          0

  ChanDirectRoute:          False

Type <CR> to continue, Q<CR> to stop:

  ChanUserPcrNumber:        User BW Off

  ChanUserMinPCRBW:         10

  ChanUserMaxPCRBW:         0

  ChanUserMaxScrBW:         0

  ChanUserMaxMbsBW:         0

  ChanNumNextAvailable:  133

Step 5 To verify the integrity or continuity of a connection, enter the tstcon command.

nodename.1.11.VISM8.a > tstcon

The following example shows a connection test for LCN 131.

nodename.1.11.VISM8.a > tstcon 131

test type is..... 1

TestCon in progress.

TestCon Passed.

Connection CAC Configuration

Note CAC must be enabled on the card.

To configure VAD tolerance and VAD duty cycle for a specific logical connection number (LCN) used for PVCs, enter the cnfconcacparams command.

nodename.1.28.VISM8.a > cnfconcacparams <LCN> <VADTolerance> <VADDutyCycle>

Replace the above arguments with the values listed in Table 8-4.

Table 8-4 Parameters for cnfconcacparams Command
Parameter	Description
LCN	Logical channel number (LCN) of the connection. Range is 131-510.
VADTolerance	VAD tolerance—the expression for VAD "over-subscription drop ratio" where: tolerance = 10000 x over-subscription drop ratio (expressed as a percentage). A typical value for VAD tolerance is 10. Some examples are: •10000 (tolerance) = 1% (over subscription drop ratio) •100 = 0.01% •10 = 0.001% •1 = 0.0001% Range is 0-10000. Default is 100.
VADDutyCycle	VAD duty cycle—the ratio of speech and holdover duration to total duration expressed as a percentage. Holdover is the period after silence begins and silence suppression is turned on. In VISM, the holdover time is 250 ms. A typical value for this parameter is 61 which means that 61% of the time is taken by speech and holdover. Range is 1-99. Default is 61.

Configuring Domain Names and IP Addresses

Complete the following steps to configure domain names and IP addresses for VISM cards and call agents:

Step 1 To specify a domain name for the VISM card, enter the cnfvismdn command.

nodename.1.28.VISM8.a > cnfvismdn <domain_name>

Replace the domain_name argument value with a text string of up to 64 alphanumeric characters; spaces are not allowed. Default name is cisco.com as shown in the following example:

nodename.1.28.VISM8.a > cnfvismdn cisco.com

Step 2 To specify the IP address and a subnet mask for the VISM card, type the cnfvismip command.

nodename.1.28.VISM8.a > cnfvismip <vismIpAddr> <netMask> |<vismBearerIpAddr> 
<bearerNetMask>|

Replace the above arguments with the values listed in Table 8-5.

Table 8-5 Parameters for cnfvismip Command
Parameter	Description
vismIpAddr	Control IP address, in dotted decimal format (nnn.nnn.nnn.nnn), of the current VISM card.
netMask	Control local network subnet mask, in dotted decimal format (nnn.nnn.nnn.nnn). The recommended value is 255.255.255.248.
\|vismBearerIpAddr\|	(Optional) Bearer IP address, in dotted decimal format (nnn.nnn.nnn.nnn).
\|bearerNetMask\|	(Optional) Bearer IP subnet mask, in dotted decimal format (nnn.nnn.nnn.nnn).

The following example shows the IP address and subnet mask configured for the VISM card and the output of the command.

nodename.1.28.VISM8.a > cnfvismip 172.29.52.003 255.255.255.248

Attaching network interface atm0... done.

Configuring TDM Side Signaling for Applications That Use CCS

Common channel signaling (CCS) uses a dedicated channel on a DS1 line to carry the signaling for the other channels on the line. Signaling is transported across the trunk as Q.931 messages in ATM cells using AAL5.

You must identify the signaling channel to the VISM/VISM-PR card.

Complete the following steps to add and configure CCS:

Step 1 To add a Reliable User Datagram Protocol (RUDP) trunk for a Link Access Protocol D Channel (LAPD) trunk connection, enter the addrudptrunk command.

nodename.1.21.VISM8.a > addrudptrunk <session_number> <local_port> <remote_port> 
<Remote_Gw_IP>

Replace the above arguments with the values listed in Table 8-6.

Table 8-6 Parameters for addrudptrunk Command
Parameter	Description
session_number	Session number in the range 1-64.
local_port	Local RUDP port number in the range 1124-49151.
remote_port	Remote RUDP port number in the range 1124-65535.
Remote_Gw_IP	IP address of the remote VISM card, in dotted decimal format (nnn.nnn.nnn.nnn).

Step 2 To add an LAPD trunk to a specific VISM card line, enter the addlapdtrunk command.

nodename.1.21.VISM8.a > addlapdtrunk <Line_Num> <Lapd_Rudp_Index>

Replace the above arguments with the values listed in Table 8-7.

Table 8-7 Parameters for addlapdtrunk Command
Parameter	Description
Line_Num	Line number in the range 1-8.
Lapd_Rudp_Index	LAPD RUDP index in the range 1-64.

Step 3 To add an ISDN PRI channel on a DS1/DS0 line, enter the addlapd command.

nodename.1.28.VISM8.a > addlapd <line_number> <ds0_number> |<lapd_side> 
<lapd_application_type>|

Replace the above arguments with the values listed in Table 8-8.

Table 8-8 Parameters for addlapd Command
Parameter	Description
line_number	Line number. Range is 1-8.
ds0_number	DS0 number. •1-24 = T1 lines •1-31 = E1 lines
\|lapd_side\|	(Optional) The side of the LAPD link. Values are •1 = Network (default) •2 = User
\|lapd_application_type\|	(Optional) Application type of the LAPD ISDN D channel. Values are •1 = PRI (default) •2 = GR-303 (not unsupported)

Step 4 To specify the LAPD stack type, enter the cnflapdtype command.

nodename.1.28.VISM8.a > cnflapdtype <line_number> <ds0_number> <lapd_type>

Replace the above arguments with the values listed in Table 8-9.

Table 8-9 Parameters for cnflapdtype Command
Parameter	Description
line_number	Line number. Range is 1-8.
ds0_number	DS0 number. •1-24 = T1 lines •1-31 = E1 lines
lapd_type	Type of LAPD stack to configure on the specified line and DS0. Values are •1 = CCITT •3 = ATT5ESSPRA •4 = ATT4ESS •6 = NTDMS100PRA •7 = VN2 or 3 •8 = INSNet •9 = TR6MFC •10 = TR6PBX	•12 = AUSP •13 = NIL •14 = SSETSI •15 = BC303TMC •16 = BC303CSC •17 = NTDMS250 •18 = Bellcore •19 = NI2 (default)

Configuring TDM Side Signaling for Applications That Use CAS

In VoIP trunking mode basic CAS configurations are not required.

For advanced CAS configurations, see the "CAS Features" section on page 9-125.

Adding DS0 Endpoints to Lines

The number of DS0s you can add depends on the template that you are using.

Complete the following steps to add DS0 endpoints to lines:

Step 1 To add multiple endpoints with one command, enter the addendpts command.

nodename.1.12.VISM8.a > addendpts <endpt_num> <ds1_num> <ds0_num> <endpts_num>

Replace the above arguments with the values listed in Table 8-10.

Table 8-10 Parameters for addendpts Command
Parameter	Description
endpt_num	First endpoint number of a range of consecutive endpoints. •Template 1 –1-145 for VISM –1-192 for VISM-PR T1 –1-248 for VISM-PR E1 •Template 2 –1-192 for T1 –1-248 for E1 •Template 3 –1-120 for VISM –1-192 for VISM-PR T1 –1-248 for VISM-PR E1 •Template 4 –1-64 for VISM –1-144 for VISM-PR •Template 5 –1-192 for VISM-PR T1 –1-248 for VISM-PR E1
ds1_num	Starting physical line number in the range 1-8.
ds0_num	Starting DS0 number from which the endpoints are added. •1-24 for T1 lines •1-31 for non-CAS E1 lines •1-15 and 17-31 for CAS E1 lines For VISM E1 cards, 16 is pre-allocated as the CAS channel. Note If the application requires CAS, issue the cnflnsig command before adding the endpoints.
endpts_num	Number of endpoints to add. •Template 1 –1-145 for VISM –1-192 for VISM-PR T1 –1-248 for VISM-PR E1 •Template 2 –1-192 for T1 –1-248 for E1 •Template 3 –1-120 for VISM –1-192 for VISM-PR T1 –1-248 for VISM-PR E1 •Template 4 –1-64 for VISM –1-144 for VISM-PR •Template 5 –1-192 for VISM-PR T1 –1-248 for VISM-PR E1

Step 2 To add a single DS0 to a line, enter the addendpt command.

nodename.1.28.VISM8.a > addendpt <endpt_num> <ds1_num> <ds0_num>

Replace the above arguments with the values listed in Table 8-10.

Step 3 To validate the endpoints that you added, enter the dspendpts command.

nodename.1.28.VISM8.a > dspendpts

    EndptNum  Ena/Speed

    --------  --- -----

    1         act/  64k

    2         act/  64k

    3         act/  64k

    4         act/  64k

    5         act/  64k

    6         act/  64k

    7         act/  64k

    8         act/  64k

    9         act/  64k

    10        act/  64k

    11        act/  64k

    12        act/  64k

    13        act/  64k

    14        act/  64k

    15        act/  64k

    16        act/  64k

    17        act/  64k

    18        act/  64k

    19        act/  64k

    20        act/  64k

Type <CR> to continue, Q<CR> to stop:

Adding RTP Connections

A Real-Time Protocol (RTP) connection must be associated with each of the endpoints being utilized in VoIP trunking. The RTP connection binds an endpoint to a UDP port.

To add an RTP connection, complete the following steps:

Step 1 To add a static RTP VoIP trunking connection, use the addrtpcon command.

nodename.1.28.VISM8.a > addrtpcon <rtp_conn_index> <rtp_endpt_num> <rtp_local_port> 
<rtp_remote_port> <rtp_remote_GW_IP_Addr> <voice_codec_type> |<voice_packet_period> 
<bearer_prec> <bearer_tos> <conn_mode> <ecan> <VAD_OnOff> <VAD_Timer> <CAS_Transport> 
<DTMF_Transport> <ICS> <payload>

Replace the above arguments with the values listed in Table 8-11.

Table 8-11 Parameters for addrtpcon Command
Parameter	Description
rtp_conn_index	Connection identification number. Range is 1-248.
rtp_endp_num	Endpoint number. •Template 1 –1-145 for VISM –1-192 for VISM-PR T1 –1-248 for VISM-PR E1 •Template 2 –1-192 for T1 –1-248 for E1	•Template 3 –1-120 for VISM –1-192 for VISM-PR T1 –1-248 for VISM-PR E1 •Template 4 –1-64 for VISM –1-144 for VISM-PR •Template 5 –1-192 for VISM-PR T1 –1-248 for VISM-PR E1
rtp_local_port	Static RTP local port number. It can be an even number in the range from 49648 to 50142. Note The odd numbers within the rtp_local_port range are reserved for Real-Time Conferencing Protocol (RTCP) ports.
rtp_remote_port	Static RTP remote port number. It can be an even number in the range from 16384 to 50142. Note The odd numbers within the rtp_remote_port range are reserved for RTCP ports.
rtp_remote_GW_IP_Addr	IP address of the remote VISM card, in dotted decimal format (nnn.nnn.nnn.nnn).
voice_codec_type	Type of coding/decoding to be performed on the data stream. It can be one of the following values: •1 = G.711u •2 = G.711a •3 = G.726-32k •4 = G.729a •5 = G.729ab •6 = Clear channel (VAD must be off) •7 = G.726-16k •8 = G.726-24k	•9 = G.726-40k •11 = G.723.1-H •12 = G.723.1a-H •13 = G.723.1-L •14 = G.723.1a-L •15 = Lossless (VAD must be off)
voice_packet_period	(Optional) Packetization period (defined in milliseconds). It can be one of the following values: •10 •20 •30 •40 •60
bearer_prec	(Optional) Bearer precedence. Range is 0-7. Default is 5.
bearer_tos	(Optional) Bearer type of service (ToS). It can be one of the following values: •0 (Default) •1 •2 •4 •8
conn_mode	(Optional) Connection mode. It can be one of the following values: •1 = VISM sends packets •2 = VISM receives packets •3 = VISM sends and receives packets (Default) •4 = Inactive. VISM does not send or receive packets
ecan	(Optional) Enables or disables echo cancellation (ECAN). It can be one of the following values: •1 = Enable ECAN (Default) •2 = Disables ECAN
VAD_OnOff	(Optional) Enables or disables voice activity detection (VAD). It can be one of the following values: •1 = On •2 = Off (Default)
VAD_Timer	(Optional) The VAD holdover timer (defined in milliseconds) in the range 250-65535.
CAS_Transport	(Optional) Enables or disables CAS transport. It can be one of the following values: •1 = On (Default) •2 = Off
DTMF_Transport	(Optional) Enables or disables DTMF tone transport. It can be one of the following values: •1 = On (Default) •2 = Off Note The DTMF_Transport argument value must be set to 1 (on) when the voice_codec_type is configured for codecs other than G.711 and G.726.
ICS	(Optional) Enables or disables idle code suppression (ICS) for the channel identifier (CID). It can be one of the following values: •1 = Enable ICS •2 = Disable ICS (Default)
payload	(Optional) Assigns the payload type. Range is 0-255. Note If you do not use the payload argument to assign the payload type, the dynamic payload is set to the static value of the DSP codec type.

Note Ensure that the local RTP port and remote RTP port have matching port numbers on the remote gateway.

Step 2 To display the configuration of the RTP trunking connection you added, use the dsprtpcon command.

nodename.1.28.VISM8.a > dsprtpcon <rtp_conn_index>

Replace <rtp_conn_index> with a value in the range 1-248. The following example shows the information for RTP connection 1.

nodename.1.28.VISM8.a > dsprtpcon 1

Connection Index:      1

Endpoint Number:       1

Local RTP Port:        49648

Remote RTP Port:       49648

Remote IP Address:     10.1.30.30

Codec Type:            G.711u

Packetization Period:  ten msec

ECAN Status:           Enable

VAD:                   Off

VAD Timer:             250 msec

CAS Transport:         On

DTMF Transport:        On

ICS Enable:            Disable

Bearer TOS:            160

Connection Mode:       GW can send and recv packets

Conn Alarm State:      Active

Conn Fail Reason:      Not Fail

Payload Type:          256

Associated PVC:        131

Sample Configuration

This section provides examples of configuring VoIP trunking between two VISM/VISM-PR cards.

Near-End Card Configuration

The following steps show the set up for VoIP trunking on the near-end VISM/VISM-PR card.

1. Set the VISM/VISM-PR mode to VoIP switching and codec template to 1.

cnfvismmode 1

cnfcodectmpl 1

Note When you make changes to the codec template, the VISM/VISM-PR card resets.

2. Add a resource partition to communicate to the PXM card.

addport

addrscprtn 1

3. Add the line, configure the line, and configure the line signaling as CCS.

addln 3

cnfln 3 2 10 2 1 1

cnflnsig 3 2

4. Add the slave connection on the VISM/VISM-PR card.

addcon 150 1 1 2 80000 1 sol-mgx2.0.1.200.220

cnfconvbdpol 150 1 2

5. Set the domain name and IP address.

cnfvismdn vism19

cnfvismip 10.60.7.1 255.255.255.0

6. Add the RUDP session for ISDN Backhaul.

addrudptrunk 3 7000 7000 10.60.8.1

7. Add the LAPD on line 3.

addlapdtrunk 3 3

addlapd 3 24 2 1

8. Add the endpoints to the line.

addendpts 21 3 1 10

9. Add the RTP connections to the far-end VISM/VISM-PR card.

addrtpcon 21 21 49688 49736 10.60.8.1 1 10 5 0 3 2 1 250 2 1

addrtpcon 22 22 49690 49738 10.60.8.1 1 10 5 0 3 2 1 250 2 1

addrtpcon 23 23 49692 49740 10.60.8.1 1 10 5 0 3 2 1 250 2 1

addrtpcon 24 24 49694 49742 10.60.8.1 1 10 5 0 3 2 1 250 2 1

addrtpcon 25 25 49696 49744 10.60.8.1 1 10 5 0 3 2 1 250 2 1

addrtpcon 26 26 49698 49746 10.60.8.1 1 10 5 0 3 2 1 250 2 1

addrtpcon 27 27 49700 49748 10.60.8.1 1 10 5 0 3 2 1 250 2 1

addrtpcon 28 28 49702 49750 10.60.8.1 1 10 5 0 3 2 1 250 2 1

addrtpcon 29 29 49704 49752 10.60.8.1 1 10 5 0 3 2 1 250 2 1

addrtpcon 30 30 49706 49754 10.60.8.1 1 10 5 0 3 2 1 250 2 1

Far-End Card Configuration

The following steps show the set up for VoIP trunking on the far-end VISM/VISM-PR card.