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18-64 August 2003 Access Navigator - Release 1.8
CLI Language Reference
CLI Command List
Purpose: Sends an out-of-band (FDL) line loopup or loopdown code over the Access Navigator
DS1. It is used with other commands and test equipment to verify that the DS1 signal
is reaching far-end CSU equipment, such as the Access Bank.
Line loopups can be used with either unframed (line) or framed (payload) patterns and
test commands, including Send DS1 Line <pattern>, Send DS1 Line <pattern> Test,
Send DS1 Payload <pattern>, and Send DS1 Payload <pattern> Test.
When the operator sends a line loopup command, the Access Navigator transmits
a T1.403 defined out-of-band line loopback activate code over the FDL channel of the
drop DS1 to the CSU. After the required 5-second integration time, the CSU should
perform a line loopback, which loops the received DS1 frame back to the DS1 transmit
output (see Figure 18-4).
When testing is complete, send a line loopdown command.
NOTE: This command will send one of the following T1.403 defined FDL
code words, repeated for 5 seconds.
Line loopback activate: 00001110 11111111
Line loopback deactivate: 00111000 11111111
Figure 18-4. Send DS1 Line Loopup
Security: Level 2 (operator)
Syntax: send ds1 <n> line <loopup|loopdown>
Field Description
n DS1 number, 1 to 32, or a range of numbers such as 2-8.
loopup Enable line loopback.
loopdown Disable line loopback.
DS1
Line
Interface
Unit
Framer
Access Navigator
IN
OUT
Time Slot
Interchange
Code
Generator
CSU
Far End
Line Loopup
Line
Loopup
Command
FDL
Code
Access Bank II