Voice Ports
This chapter explains how to configure voice ports using the commands specific for Cisco VG450 Analog Voice Gateways and associated service modules.
This chapter contains the following topics:
Prerequisite
Before you configure voice ports on Cisco VG450 you must establish a working IP network.
Configuring the Voice Port
This section discuss the changes and modifications on the following commands:
For configuration examples, see Cisco VG450 Configuration Examples.
loop-length
The loop-length CLI is created to configure the analog FXS voice port. It has the following format:
voice-port x/y/z
[no] loop-length [long | short]
The loop-length CLI has the following characteristics:
-
For Cisco VG450 platform, the default is short loop-length. This command is not applicable to analog FXS on motherboard slot.
-
This command is applicable to all 48 FXS voice ports on SM-D-48FXS-E and the first 4 (0-3) FXS voice ports on SM-D-72FX like Cisco VG450 platform.
-
The default FXS is short loop-length and long loop-length FXS needs to be configured and can be applied on motherboard NIM slots.
-
The first sixteen voice ports 0/0/0-15 can be configured as long loop (OPX-lite).
-
FXS voice ports on VIC 1 (0/1/0 - 0/1/23) will not support long loop. By default, they are short-loop FXS.
-
Shutdown and no shutdown are required on the voice port after loop-length is configured for it to take effect.
-
Because up to 2 ren is supported on long-loop (OPX-lite) FXS, when loop-length long is configured on the FXS voice port, if its existing ren configuration is greater than 2, it will be changed automatically to 2, a message “The existing ren configuration is changed to 2" is displayed on the console.
-
When loop-length short is configured on the FXS voice port, if the voice port has ring dc-offset configured, the ring dc-offset configuration will be removed. A message “The existing ring dc-offset configuration is removed” is displayed on the console.
ren
The existing ren CLI under FXS voice port will accept value 1-2 for FXS voice port with loop-length long configured. For short loop-length analog FXS voice port, ren CLI will accept value 1-5.
ren dc-offset
The existing ring dc-offset
CLI is configurable on the long loop-length FXS voice port.
cm-current-enhance
The existing cm-current-enhance
CLI is configurable on the long loop-length FXS voice port.
vmwi
The existing vmwi [fsk | dc-voltage]
is configurable on all on-board FXS voice ports.
Cisco IOS Bulk Configuration
An optional bulk-configuration mechanism for voice-port and voice dial peer is available to save on time.
group
The group option is added to dial-peer CLI for dial peer bulk configuration. It has the following formats:
dial-peer group <tag> pots
dial-peer group <tag> pots all stcapp
The second command from the above list will create dial peers on all analog voice ports as stcapp ports by expanding it to the following three commands:
dial-peer group <tag> pots
service stcapp
port all
The group command is specific for stcapp-controlled analog ports. Therefore, only a subset of dial peer commands are supported, which are as follows:
-
port
-
description
-
service
-
shutdown
-
preference
The port subcommand specifies what ports to configure for a specific group command. It has the following formats:
port <voice port#> [ans | called | dest] <E164 address> [desc <description>]
port <voice port#> [desc <description>]
port <voice port#>
port <start voice port#>-<end port#> [ans | called | dest] <E164 address> <interval>
[desc <description>]
port <start voice port#>-<end port#> [ans | called | dest] <E164 address> [desc
<description>]
port <start voice port#>-<end port#> [desc <description>]
port <start voice port#>-<end port#>
port all [ans | called | dest] <E164 address> <interval> [desc <description>]
port all [ans | called | dest] <E164 address> [desc <description>]
port all [desc <description>]
port all
-
The
voice port#
is composed ofslot#/subunit#/port# or slot#/port#
. -
The ans is the abbreviation for
answer-address
, which has the same meaning as the subcommand underdial-peer voice <tag> pots
. -
The called is the abbreviation for
incoming called-number
, which has the same meaning as the subcommand underdial-peer voice <tag> pots
. -
The dest is the abbreviation for
description
, which has the same meaning as the subcommand underdial-peer voice <tag> pots
. -
The
<interval>
denotes the interval value of the E164 number for each adjacent port. The default is zero and the allowable value is from 1 to 100, inclusively. -
Multiple port commands are allowed and can be removed one by one with exact port specification or all at once using
no port all
. -
No overlay port commands are allowed. As a result, no other port commands are allowed if port all is configured.