Tap; Table C-67. Arguments For The T1_Loopback Command - Nortel 2000 Software Reference Manual

Book C

Table C-67. Arguments for the T1_Loopback Command

Argument
None
Line
Payload
Local

tap

The superuser tap command displays input and output on a device
attached to a specific port. Any input from the port performing the tap is
inserted into the tapped port's input stream. Table C-68 describes the
arguments for tap. The syntax is:
tap [–aksvx] port
Remote Annex Administrator's Guide for UNIX
Chapter 3
Description
No loopback. This is the default. If the t1_loopback
command is initiated with no parameters, then none
is assumed. It cancels any user specified loopbacks.
Line loopback provides the network a means to test
the T1 circuit for single ended fault isolation. The
line loopback regenerates the DS1 signal and does
not correct bipolar violations.
Payload loopback is used to provide a loopback
toward the network. The data portion of the DS0s is
looped back.
Local loopback will loopback the data from the
customer side of both the T1 Network Interface and
the T1 Drop/Insert Interface.
Network direction loopbacks in most
cases can be initiated by the Telco. The
front panel Test indicator illuminates
when the T1 is in loopback.
Using the CLI Commands
Book C-205