Carrier Access Access Navigator user manual Syntax send ds1 n niu loopup loopdown

CLI Language Reference

CLI Command List

NIU 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 the niu loopup command, the Access Navigator transmits a T1.403 defined in-band NIU line loopback activate code over the drop DS1 to the NIU. After the required 5-second integration time, the NIU should perform a line loopback, which loops the received DS1 frame back to the DS1 transmit output (see Figure 18-8).

When testing is complete, send an niu loopdown command.

NOTE: This command will send one of the following T1.403 defined code words, repeated for 5 seconds. Telcordia TR-TSY-000312 calls them Facility-2 (FAC2) loopcodes.

NIU loopback activate (FAC2 2-in-5):	00011	00011 ...
NIU loopback deactivate (FAC2 3-in-5):	00111	00111 ...

NIU

Access Navigator

Inband

Far End

Code

Loopup

Generator

Code

Line Loopup

Command

IN

Smart Jack

Time Slot

Line

Framer

Interface

DS1

NIU

Interchange

OUT

Unit

Figure 18-8. Send DS1 NIU Line Loopup

Security: Level 2 (operator)

Syntax: send ds1 <n> niu <loopuploopdown>

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.

Example: send ds1 9 niu loopup

Message: Loopup signal sent to remote.

Waiting for confirmation.....loopup confirmed.

18-72 August 2003 Access Navigator - Release 1.8