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Updated:August 11, 2017
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This module describes how to configure voice and data support on the next generation of voice/WAN Interface Cards (VWICs) also known as VWIC3s.
The following Cisco products are covered in this document:
Cisco 1-Port and 2-Port T1/E1 VWIC3s
– 1-port SKU: VWIC3-1MFT-T1/E1
– 2-port SKU: VWIC3-2MFT-T1/E1
Cisco 1-Port and 2-Port T1/E1 VWIC3s with unframed E1
– 1-port SKU: VWIC3-1MFT-G703
– 2-port SKU: VWIC3-2MFT-G703
Platforms supported
Cisco 1-Port and 2-Port T1/E1 VWIC3s and Cisco 1-Port and 2-Port T1/E1 VWIC3s with unframed E1 are supported on Cisco 2901, Cisco 2911, Cisco 2921, Cisco 2951, Cisco 3925, Cisco 3925E, Cisco 3945, and Cisco 3945E.
For the Cisco Integrated Services Router Generation 2 (Cisco ISR-G2) platforms, digital voice capability for 1-Port and 2-Port VWIC3s is only supported on motherboard (MB) VWIC slots.
Finding Feature Information
Your software release may not support all the features documented in this module. For the latest feature information and caveats, see the release notes for your platform and software release. To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the “Feature Information for Voice and Data Support on VWIC3s” section.
Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to http://www.cisco.com/go/cfn. An account on Cisco.com is not required.
Note The show controller command will always display zero for the BERT kbits (last) field regardless of the amount of BERT throughput.
Channel-groups supported
VWIC3-1MFT-T1/E1 supports two channel-groups per VWIC, up to two per port.
VWIC3-1MFT-G703 supports two channel-groups per VWIC, up to two per port.
VWIC3-2MFT-T1/E1 supports two channel-groups per VWIC, up to two per port.
VWIC3-2MFT-G703 supports two channel-groups per VWIC, up to two per port.
VWIC Support
The VWIC3s can only be plugged into EHWIC slots on ISR-G2 for voice support.
Independent Clocking Mode
The independent clocking mode is supported on the following modules:
VWIC3-1MFT-T1/E1
VWIC3-2MFT-T1/E1
VWIC3-1MFT-G703
VWIC3-2MFT-G703
To enable independent clocking mode, use the clock source line independent command to specify that the port can operate using an independent clocking domain. The independent keyword means that the specific port is independent from the VWIC3 controller clocking domain. Prior to the addition of the independent keyword, port 0 was the default primary clock source and ports 1, 2, and 3 were loop timed. With the clock source line independent command, independent clocking mode is enabled and the prior dependency no longer exists.
When independent clocking is configured, the port supports only data applications and voice applications are not supported. However, other ports that do not have independent clocking enabled but use the same controller still support voice applications.
For example, a VWIC3-2CE1T1-PRI has the following configurations:
network-clock-participate wic 3
……
controller T1 0/3/0
cablelength long 0db
!
controller T1 0/3/1
cablelength long 0db
clock source line independent
!
Port 1 enables independent clocking. It only supports channel group and data applications, and port 0/2/3 support all voice applications.
When using the clock source line independent and no clock source line independent commands, the channel group must be removed from the configuration.
Information About Voice and Data support on VWIC3s
This section provides information about the following:
Key Features of T1/E1 Multiflex Trunk Voice/WAN Interface Cards
The 1-Port and 2-Port VWIC3s have the following key features:
Full support for T1 Facility Data Link (FDL)
Controller local loopbacks
Controller remote loopbacks
RFC 1406 and integrated CSU/DSU MIB
MIB and Simple Network Management Protocol (SNMP) management
Firmware to support T1 and E1 Layer 1 homologation
The G703 VWIC3 cards supports unframed E1. For more information on features and configuration samples of unframed E1, see “Related Documents” section.
User-initiated VWIC reset and field-programmable gate array (FPGA) download
Voice support (includes dso-group and pri-group configuration)
Integrated Drop and Insert Capability
The drop and insert feature enables the removal of DS0 time slots from one E1 interface and insertion into time slots of the other E1 interface. This feature is available in VWIC applications. If you configure drop and insert, be sure that the E1 framing under the controllers involved (the tdm-groups configuration location) is the same. If you use different frame types, the signaling bits may not be read properly. This failure occurs during the drop of a channel from one controller and insertion into a channel from another controller. Drop and insert time slots do not need to be contiguous.
Note For enabling the Drop and Insert in vwic3, run the network clock participate command on a particular wic slot. For instance, network-clock-participate wic 0.
You do not need do this in vwic2 because in vwic2 the internal PLL per module will synchronize clock source line and clock source internal. The internal PLL is removed from vwic3 to provide more flexibility.
How to Configure Voice Support on T1/E1 VWIC3s
To configure the 1-port and 2-port T1/E1 VWIC3s feature, perform the task described in the following section
Perform this task to configure a T1 or E1 interface with independent clocking enabled and integrated drop and insert on a multiflex trunk voice/WAN interface card.
SUMMARY STEPS
1. enable
2. configure terminal
3. card type {e1 | t1} slot subslot
4. voice-card slot
5. codec complexity { flex [ reservation-fixed { high | medium }] | high | medium }
6. controller {e1 | t1} slot / port
7. framing {sf | esf} or framing {crc4 | no-crc4}
8. linecode {ami | b8zs} or linecode { ami | hdb3 }
11. voice-port { slot-number / subunit-number / port | slot / port : ds0-group-number }
12. exit
DETAILED STEPS
Command or Action
Purpose
Step 1
enable
Router> enable
Enables privileged EXEC mode.
Enter your password if prompted.
Step 2
configure terminal
Router# configure terminal
Enters global configuration mode.
Step 3
card type { e1 | t1 } slot subslot
Router(config)# card type t1 0 0
Sets or changes the card type to E1 or T1.
slot —Specifies the slot number. Range can be 0 to 6, depending on the platform.
subslot —Specifies the VWIC slot number. Range can be 0 to 3, depending on the host module or platform.
When the command is used for the first time, the configuration takes effect immediately. A subsequent change in the card type will not take effect unless you enter the reload command or reboot the router.
Note When you are using the card type command to change the configuration of an installed card, you must enter the no card type {e1 | t1}slot subslot command first. Then enter the card type{e1 | t1}slot subslot command for the new configuration information.
Step 4
voice-card slot
Router(config)# voice card 1
Enters voice card interface configuration mode.
Specify the slot location using a value from 0 to 5.
Step 5
codec complexity {
flex [
reservation-fixed {
high |
medium }] |
high |
medium }
Router(config-voicecard)# codec complexity flex
Specifies the codec complexity based on the codec standard you are using.
flex —Up to 16 calls can be completed per Digital Signal Processor (DSP). The number of supported calls varies from 6 to 16, depending on the codec used for a call. In this mode, reservation for analog Voice Interface Cards (VIC) may be needed for certain applications such as CAMA E-911 calls because oversubscription of DSPs is possible. If this is true, then the reservation-fixed option may be enabled. There is no reservation by default.
– reservation-fixed—Not applicable to the VWIC or the T1/E1 VIC.
high —Up to six voice or fax calls can be completed per DSP, using the following codecs: G.711, G.726, G.729, G.729 Annex B, G.723.1, G.723.1 Annex A, G.728, and GSMEFR.
Note High-complexity codecs support lower call density than do medium-complexity codecs.
medium —Up to eight voice or fax calls can be completed per DSP, using the following codecs: G.711, G.726, G.729 Annex A, G.729 Annex B with Annex A, GSMFR, and fax relay.
Note All medium-complexity codecs are supported in high-complexity codecs.
The keyword that you specify for the codec complexity command affects the codecs available when you use the codec dial peer voice configuration command. If you select a codec that is not available, an error message appears.
You cannot change codec complexity while DS0 groups are defined. If they are already set up, follow these steps:
1. Shut down the voice port associated with the controller.
2. Remove the DS0 group or PRI group under the T1 or E1 controller.
3. Enter the voice-card slot command, and then change the codec complexity.
Note This procedure to change codec complexity applies only to T1 and E1 controllers. This is not valid for analog voice ports.
Step 6
controller { e1 | t1 } slot / port
Router(config-voicecard)# controller t1 0/0
Enters controller configuration mode for the VWIC.
Valid values for slot are 0 through 5 and for port are 0 and 1.
Step 7
framing { sf | esf }
or
framing { crc4 | no-crc4 }
Router(config-controller)# framing esf
Router(config-controller)# framing crc4
Specifies a frame type.
The controller command must be entered before this command can be used.
The frame type for T1 controllers can be specified as sf for superframe or esf for extended superframe.
The frame type for E1 controllers can be specified as crc4 or no-crc4.
Step 8
linecode { ami | b8zs }
or
linecode { ami | hdb3 }
Router(config-controller)# linecode b8zs
Router(config-controller)# linecode hdb3
Specifies a line encoding for a controller.
The controller command must be entered before this command can be used.
Router(config-controller)# clock source line independent
Specifies the clock source.
When both ports are set to line clocking with no primary specification, port 0 is the default primary clock source and port 1 is the default secondary clock source.
– When both ports are set to line and one port is set as the primary clock source, the other port is by default the backup or secondary source and is loop-timed.
– If one port is set to clock source line and the other is set to clock source internal, the internal port recovers clock from the clock source line port if the clock source line port is up. If it is down, then the internal port generates its own clock.
– If both ports are set to clock source internal, there is only one clock source—internal.
– The optional keywords primary and bits appear in the command-line interface, but they have no impact on this particular configuration.
– The independent keyword expands on the clock source internal and clock source line to specify that the port can operate on an independent clocking domain. Port 0 is the default primary clock source, and port 1 is the default secondary clock source and is loop-timed. With independent clocking enabled, this dependency no longer exists, so the independent keyword means that both ports can be independently clocked.
– The free-running keyword specifies a free-running clock derived from the oscillator on the motherboard, which is used only for testing and back-to-back connections.
(Voice only) Defines the T1 channels for use by compressed voice calls and the signaling method the router uses to connect to the PBX or central office.
Set up DS0 groups after you have specified codec complexity in the voice-card configuration.
ds0-group-number —Value from 0 to 23 that identifies the DS0 group.
The ds0-group command automatically creates a logical voice port that is numbered as follows: slot / port : ds0-group-number. Although only one voice port is created, applicable calls are routed to any channel in the group.
The timeslot-list argument is a single number, numbers separated by commas, or a pair of numbers separated by a hyphen to indicate a range of time slots.
The signaling method selection for the type keyword depends on the connection that you are making:
– The E&M interface allows connection for PBX trunk lines (tie lines) and telephone equipment.
– The Foreign Exchange Station (FXS) interface allows connection of basic telephone equipment and PBX.
– The Foreign Exchange Office (FXO) interface is for connecting the CO to a standard PBX interface where permitted by local regulations; it is often used for off-premises extensions (OPXs).
or
Specifies that the controller should be set up as a PRI interface.
For T1, the last defined channel is the D channel.
If a controller is configured as PRI, individual channel groups cannot be configured on that controller.
The controller command must be entered before this command can be used.
Note To use this command to create a PRI group, you must first enter the isdn switch-type command in global configuration mode.
Step 11
voice-port { slot-number / subunit-number / port | slot / port : ds0-group-number }
Router(config-controller)# voice-port 3/0:0
Enters voice port configuration mode and specifies the voice port.
The slot-number argument identifies the slot where the VIC is installed. Valid entries are from 0 to 3, depending on the slot in which it has been installed.
The subunit-number identifies the subunit on the VIC where the voice port is located. Valid entries are 0 or 1.
The port argument identifies the voice port number. Valid entries are 0 and 1.
or
The slot argument is the slot in which the voice port adapter is installed. Valid entries are from 0 to 3.
The port argument is the voice interface card location. Valid entries are 0 to 3.
The ds0-group-number argument indicates the defined DS0 group number. Each defined DS0 group number is represented on a separate voice port. This allows you to define individual DS0s on the digital T1/E1 card.
Step 12
exit
Router(config-voiceport)# exit
Exits controller configuration mode and returns the router to privileged EXEC mode.
Configuration Examples for T1/E1 VWIC3s with voice support
This section shows an example for the 2-port VWIC3 in T1 configuration.
Example: 2-Port T1 VWIC3
In this example, the 2-port VWIC3 is set to card type T1 and is configured with default settings. Channel groups are defined on ports 0 and 1.
informers# sh run
Building configuration...
! voice-card 0:
! Mixed PVDM3 and PVDM2 C5510 DSP cards detected.
! Mixed DSP types in this slot is an unsupported configuration.
! PVDM2 C5510 DSP cards have been disabled.
Warning! DSPs1, 2, 3, 4, 5, 6, in slot 0 are using non-default firmware from flash:
This is not recommended, the default version is 27.0.200
Current configuration : 2377 bytes
!
! Last configuration change at 13:59:20 PST Wed Mar 10 2010
!
version 15.1
service timestamps debug datetime msec localtime show-timezone
service timestamps log datetime msec localtime show-timezone
no service password-encryption
!
hostname informers
!
boot-start-marker
boot system flash:c3900e-universalpi13k9-mz.SSA.argot
boot-end-marker
!
card type t1 0 1
card type e1 0 2
logging buffered 8000
no logging console
enable password lab
!
no aaa new-model
!
clock timezone PST 16
!
network-clock-participate wic 1
no network-clock-participate wic 2
network-clock-select 1 T1 0/1/0
no ipv6 cef
ip source-route
!
!
ip cef
!
!
no ip domain lookup
!
multilink bundle-name authenticated
!
!
!
!
isdn switch-type primary-ni
!
!
!
voice-card 0
codec complexity medium
!
!
!
voice service pots
!
voice service voip
!
!
!
!
!
license udi pid C3900-SPE250/K9 sn FHH1334001J
!
!
!
redundancy
!
!
crypto ikev2 diagnose error 50
!
!
controller T1 0/1/0
cablelength long 0db
ds0-group 1 timeslots 1-24 type e&m-immediate-start
Definitions of Managed Objects for the DS1 and E1 Interface Types
Technical Assistance
Description
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Feature Information for Voice and Data Support on VWIC3s
Table 1 lists the release history for this feature.
Use Cisco Feature Navigator to find information about platform support and software image support. Cisco Feature Navigator enables you to determine which software images support a specific software release, feature set, or platform. To access Cisco Feature Navigator, go to http://www.cisco.com/go/cfn. An account on Cisco.com is not required.
NoteTable 1 lists only the software release that introduced support for a given feature in a given software release train. Unless noted otherwise, subsequent releases of that software release train also support that feature.
Table 1 Feature Information for Voice and Data Support on VWIC3s
Feature Name
Releases
Feature Information
1-Port and 2-Port VWIC3s - Voice WAN Interface Cards
15.0(1)M3, 15.1(2)T, 15.1(1)T1
Digital voice support is introduced on VWIC3-1MFT-G703(T1/E1), and VWIC3-2MFT-G703(T1/E1).
This feature is supported on Cisco 2901, 2911, Cisco 2921, Cisco 2951, Cisco 3925, Cisco 3925E, 3945, and Cisco 3945E.
The following sections provide information about this feature:
1-port SKU: VWIC3-1MFT-T1/E1
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