Juniper JUNOSE 11.2.X PHYSICAL LAYER Configuration Manual page 48

JunosE 11.2.x Physical Layer Configuration Guide
t1 loopback
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NOTE: The CT3/T3-F0 line module supports only the 2^11, 2^15, and 2^20-O153 options.
0s—Repetitive test pattern of all zeros, 00000...
1s—Repetitive test pattern of all ones, 11111...
2^11—Pseudorandom test pattern, 2047 bits in length
2^15—Pseudorandom test pattern, 32,767 bits in length
2^20-O153—Pseudorandom test pattern, 1,048,575 bits in length
2^20-QRSS—Pseudorandom QRSS test pattern, 1,048,575 bits in length
2^23—Pseudorandom test pattern, 8,388,607 bits in length
alt-0-1—Repetitive alternating test pattern of zeros and ones, 01010101...
NOTE: The BERT patterns supported when testing the T1 layer vary depending on the
line module and I/O module assembly you are using.
Specify the duration of the test in the range 1–1440 minutes.
Optionally, specify the unframed keyword to overwrite the framing bits.
Example
host1(config-controll)#t1 2 bert pattern 2^11 interval 10 unframed
Use the no version to stop the test that is running.
See t1 bert.
Use to configure a loopback.
Specify one of the following options:
NOTE: The CT3/T3-F0 line module does not support the remote line inband option.
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
network { line | payload }—Specify the line keyword to loop the data back toward
the network before the T1 framer and automatically set a local loopback at the HDLC
controllers. Specify the payload keyword to loop the payload data back toward the
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