Dti/Pri Local Self-Test; Dti/Pri Automatic Local Loopback Test - Nortel Meridian 1 Option 11C Manual

Self-tests of the NTAK93 daughterboard are invoked manually by commands
in LD 96.

DTI/PRI local self-test

The local self-test, also called a local loopback test, checks speech path
continuity, zero code suppression, remote alarm detection, and A and B bit
signalling. This test is performed manually on a per-loop (or link- 24
channels) or per-channel basis. The local loopback test performs a local
logical loopback and does not require any external loopback of the T-1 signal.
Restrictions and limitations
The DCHI and DTI/PRI must be disabled before performing the self-test on
the entire DTI/PRI card. Individual channels must be disabled before
performing a self test on a particular channel.
Self testing the DTI/PRI card
To perform a self test on the entire DTI/PRI card, do the following:
1 Disable the DCHI using LD 96:
LD 96
DIS DCH N
2 Disable the DTI/PRI card and run the self-test using LD 60:
LD 60
DISL C
SLFT C (entire card)
Self testing individual channels
Follow the same procedure as above, but use the following commands:
DSCH C CH
SLFT C CH (specific channel)

DTI/PRI automatic local loopback test

There are two types of automatic local loopback tests:
• ATLP 0 (disable auto loop test in daily routine — LD 60)
• ATLP 1 (enable auto loop test in daily routine — LD 60)
DTI/PRI Maintenance
Option 11C
Page 59 of 100
1.5 Mb DTI/PRI