[Contents]
[Prev]
[Next]
[Index]
[Report an Error]
t1 loopback
Syntax
t1 t1Channel loopback [ local |
network { line | payload } ]
no t1 t1Channel loopback
t1 t1Channel loopback remote { line { fdl
{ ansi | bellcore } | inband } |
payload [ fdl ] [
ansi ] }
no t1 t1Channel loopback remote
Release Information
Command introduced before JUNOSe Release
7.1.0.
Description
Configures a loopback test for a T1 line on a CT3
module. The no version deactivates the loopback test; if you specify
the remote keyword, the no version sends the 16-bit ESF data link code word or inband pattern
to deactivate the loopback at the remote end based on the last activate
request sent to the remote end. If you do not specify the remote keyword, the no version
clears the local loopback configuration.
Options
-
t1Channel—One or more individual
T1 channels, ranges of T1 channels, or combination of individual channels
and ranges, in the range 1–28 (no spaces); for example, 3,7-15,19-13,27
- local—Loops the router output data back toward the
router at the T1 framer; on supported line modules also sends an alarm
indication signal (AIS) out toward the network. This is the default
setting if you specify no optional keywords.
- network line—Loops the data back toward the network
before the T1 framer and automatically sets a local loopback at the
HDLC controllers
- network payload—Loops the payload data back toward
the network at the T1 framer and automatically sets a local loopback
at the HDLC controllers
- remote line fdl ansi—Sends a repeating 16-bit ESF
data link code word (00001110 11111111) to the remote end requesting
that it enter into a network line loopback. The ansi keyword enables the remote line FDL ANSI bit loopback on the T1
channel, according to the ANSI T1.403 specification.
- remote 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. The bellcore keyword enables the remote line FDL Bellcore bit loopback on the
T1 channel, according to the Bellcore TR-TSY-000312 specification.
- remote line inband—Sends a repeating 5-bit inband
pattern (00001) to the remote end, requesting that it enter into a
network line loopback
- remote 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 channel. You can
optionally specify fdl and ansi, but it is not
necessary.
Controller Configuration
[Contents]
[Prev]
[Next]
[Index]
[Report an Error]
