Configuration Example; Testing Interfaces; Testing At The T3 Layer - Juniper JUNOSE 11.0.X PHYSICAL LAYER Configuration Manual

Configuration Example

The following example illustrates how to configure the layers on a channelized T3
interface:

Testing Interfaces

If you want to run loopback tests or bit error rate tests on channelized T3 interfaces,
you must enable testing at the T3 or T1 layer. See "Interface Stack" on page 7 for
a description of the layers.
For a list of the modules that support bit error rate tests (BERTs) and remote loopback,
see ERX Module Guide, Appendix A, Module Protocol Support.
NOTE: BERTs are supported on frame-based channelized T3 interfaces, with the
exception of the CT3/T3 line module used with the 3-port CT3/T3 I/O module.

Testing at the T3 Layer

To enable testing at the T3 layer:
1.
2.
3.
host1(config)#controller t3 0/1
host1(config-controll)#no shutdown
host1(config-controll)#framing c-bit
host1(config-controll)#clock source internal module
host1(config-controll)#cablelength 220
host1(config-controll)#t1 2 framing esf
lihost1(config-controll)#t1 2 clock source internal
host1(config-controll)#t1 2 loopback local
host1(config-controll)#t1 2/1 timeslots 1,3-8,10
host1(config-controll)#exit
host1(config)#interface serial 0/1:2/1
host1(config-if)#invert data
host1(config-controll)#exit
Change the clock source to internal.
host1(config-controll)#clock source internal module
Configure one of the following tests:
Set the loopback to local to test the line without connecting to the network.
host1(config-controll)#loopback local
Set the loopback to network to test the line connected to the network.
host1(config-controll)#loopback network line
(Optional) Configure one of the following tests for remote loopback:
Chapter 1: Configuring Channelized T3 Interfaces
Configuration Example
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