Juniper JUNOSE 10.0.X PHYSICAL LAYER, Configuration Manual

Page: 52 / 262

■
payload —Loops the data toward the network after the framer processes the
data
■
remote —Sends a far end alarm code in the C-bit framing, as defined in ANSI
T1.404, to notify the remote end to activate or (when you use the no version)
deactivate the line loopback
NOTE: Remote loopback is available only on channelized T3 interfaces configured
to use C-bit framing.
■
Example
host1(config-controll)# loopback local
■
Use the no version to restore the default configuration, no loopback.
■
See loopback.
Testing at the T1 Layer
The T1 channel testing commands enable you to specify testing parameters for a
single channel, multiple individual channels, ranges of channels, or any combination
of the three types of specifications. For example:
host1(config-controll)# t1 3,6-15,22,25-27 loopback local
To enable testing at the T1 layer:
1.
Configure one of the following loopback tests.
■
Set the loopback to local to test the line without connecting to the network.
host1(config-controll)# t1 2 loopback local
■
Set the loopback to network to test the line connected to the network.
host1(config-controll)# t1 2 loopback network line
■
Set the loopback to remote-loopback to enable acceptance of loopback
commands issued from a remote router.
host1(config-controll)# t1 2 remote-loopback
2.
Configure the line to run bit error rate tests.
host1(config-controll)# t1 2 bert pattern 2^11 time 10 unframed
t1 bert
■
Use to enable bit error rate tests using the specified pattern on a T1 interface.
■
Unlike other configuration commands, bert is not stored in NVRAM.
26 ■
Testing Interfaces
JUNOSe 10.0.x Physical Layer Configuration Guide