Testing Connectivity - Juniper PHYSICAL LAYER - CONFIGURATION GUIDE V11.1.X Configuration Manual

JUNOSe 11.1.x Physical Layer Configuration Guide
path ds3 t1 remote-loopback

Testing Connectivity

Use the path overhead j1 command to check for connectivity between the router
and a SONET/SDH device at the other end of the line. This command defines:
When you define a message that the interface sends, you must monitor receipt of
that message at the remote end.
When you define a message that the interface expects to receive, you should configure
the remote device to transmit the same message to the interface. You can then use
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Testing Interfaces
loopback. Specify the ansi keyword to enable the remote line FDL ANSI bit
loopback on the T1 line, according to the ANSI T1.403 specification.
line fdl bellcore Sends a repeating 16-bit ESF data link code word
(00010010 11111111) to the remote end requesting that it enter into a
network line loopback. Specify the bellcore keyword to enable the remote
line FDL Bellcore bit loopback on the T1 line, according to the Bellcore
TR-TSY-000312 specification.
payload [ fdl ] [ ansi ] Sends a repeating 16-bit ESF data link code word
(00010100 11111111) to the remote end requesting that it enter into a
network payload loopback. Enables the remote payload FDL ANSI bit
loopback on the T1 line. You can specify fdl or ansi.
Example
host1(config-controll)#path 12 ds3 2 t1 14 loopback remote payload
Use the no version to send the 16-bit ESF data link code word to deactivate the
loopback at the remote end, depending on the last activate request sent to the
remote end.
See path ds3 t1 loopback.
Use to enable the router to accept remote loopback requests from a remote
device connected at the T1 over T3 layer.
Example
host1(config-controll)#path 12 ds3 2 t1 14 remote-loopback
Use the no version to restore the default, which is to reject remote loopback
requests.
See path ds3 t1 remote-loopback.
A message that the router sends from the specified interface to the SONET/SDH
device at the other end of the line.
A message that the router expects to receive on the specified interface from the
SONET/SDH device at the other end of the line.