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Chapter 4
Configuring the PA-VXA, PA-VXB, and PA-VXC
Step 4
Use the controller command in configuration mode to enter the controller configuration mode for the
desired controller:
Router(config)# controller t1
Router(config-controller)#
Note
Step 5
Use the framing command to select carrier framing. If the card is set to T1, set framing to extended super
frame (ESF) as shown in the example below:
Router(config-controller)# framing esf
If the card is set to E1, set framing to CRC4 as shown in the example below:
Router(config-controller)# framing crc4
Step 6
Use the linecode command to select the line coding. T1 cards should be set to binary 8-zero substitution
(B8ZS) as shown in the example below:
Router(config-controller)# linecode b8zs
E1 cards should be set to HBD3 line code as shown in the example below:
Router(config-controller)# linecode hbd3
Use the clock source command to select between internal or line clocking.
Step 7
Router(config-controller)# clock source line
Note
Step 8
When installed in a Cisco 7200 VXR router, use the frame-clock-select priority carrier-type controller
command in configuration mode to specify the clock source. This command may be used to specify
backup clock sources, as shown in the example below:
Router(config)# frame-clock-select 1 T1 1/0
Router(config)# frame-clock-select 2 T1 1/1
The example above assigns T1 1/0 as the primary clock source. If that clock fails, T1 1/1 will become
the primary clock source.
Step 9
Use the ds0-group number timeslots range type command to create a DS0 group.
Router(config-controller)# ds0-group 1 timeslots 10-18 type e&m-wink-start
Note
Change the shutdown state to up and enable the interface:
Step 10
Router(config-controller)# no shutdown
OL-3592-02
The following steps must be done in controller configuration mode.
Line clocking is normally selected because of the highly accurate clock source supplied by
the network.
The time slot range for a T1 card is 1 to 24, the time slot range for an E1 card is 1 to 30.
T1/E1 Digital Voice Port Adapter Installation and Configuration
Configuring the Interface
4-5
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Table of Contents
Troubleshooting
