- Enterasys Security Router User's Guide

Configuring Channelized T1/E1 Interfaces
XSR User’s Guide 4-5
• The D&I NIM supports different framing and line coding on the CO T1 and PBX T1 ports (ESF
versus D4, B8ZS versus AMI), but if the ports are not identically configured, the bypass relays
will not restore the voice link in the case of an XSR failure or power outage.
• The CO T1/E1 port supports one PPP or Frame Relay channel.
• The T1E1 Drop & Insert NIM includes the same data functionality as the standard two-port
Fractional T1E1 NIM.
• The PBX T1 port need not support a data channel.
Refer to “Configuring the D&I NIM” on page 4-13 for a configuration example.
Configuring Channelized T1/E1 Interfaces
Perform the following steps to set up a channelized T1/E1 port. This T1 example is similar to that
for an E1 controller and associated port.
1. Specify the slot/card/port address of the controller to be configured:
XSR(config)#controller t1 0/1/0
This command automatically adds a full-rate channel group on port 0 and acquires Controller mode.
Alternatively, you can add a different port and manually add a channel group using any of 24 timeslots.
2. Specify the clock source for the controller.
XSR(config-controller<T1-1/0>)#clock source line
The clock source command determines which one of the circuits provides the clocking signal.
3. Specify the controller's framing type:
XSR(config-controller<T1-1/0>)#framing esf
4. Specify the controller's line encoding type:
XSR(config-controller<T1-1/0>)#linecode b8zs
5. Specify a channel group and map timeslots to the group. Enter the channel-group command.
XSR(config-controller<T1-1/0>)#channel-group 0 timeslots 1,3-5,8
The example specifies channel group 0 and maps timeslots 1, 3 through 5, and 8 to channel group 0.
6. Enter the no shutdown command to enable the line.
XSR(config-controller<T1-1/0>)#no shutdown
7. If IP routing is enabled, assign an IP address and subnet mask to the channel group with the
interface and ip address commands:
XSR(config)#interface serial 1/0:0
That is, NIM 1, port 0, and Channel group 0.
XSR(config-if<S1/0:0>)#ip address 10.1.16.2 255.255.255.0
8. Specify the encapsulation protocol to be used over this interface.
XSR(config-if<S1/0:0>)#encapsulation ppp
In this example PPP is used.
Note: All of the above features are supported for the E1 interface, as well. The E1’s timeslot 16 is
reserved for CAS signaling and can not be configured for data.
Note: Each channel group is represented as a serial interface and is set individually. Channel
groups are created as shown above but to configure them you must acquire Interface Serial mode
as shown below.