Option 11C Dti/Pri Maintenance Tools; Maintenance Commands - Nortel Meridian 1 Option 11C Manual

Page 52 of 100 DTI/PRI Maintenance

Option 11C DTI/PRI maintenance tools

Maintenance commands

553-3011-310 Standard 13.00
It is possible, however, that the T1 connection is one-way only — that is,
receiving only, since this end is receiving the alarm. The yellow alarm is
transported in one of two ways: using digit-2 or the facility data link (DG2 or
FDL).
When the PRI/DTI circuit card receives a yellow alarm, the channels are
placed into the maintenance busy state.
Each time a yellow alarm is generated, a counter is incriminated. When the
yellow alarm 24-hour threshold (prompt RALM in LD 73) is reached, the
PRI/DTI circuit card must be restored to service manually.
DTI/PRI Red Alarm (local alarm)
A red alarm (local alarm) indicates that the digital trunks or B-channels have
been taken out of service (OOS) due to a loss of frame alignment lasting more
than three seconds, or due to some facility performance OOS threshold being
exceeded.
Maintenance and OOS messages are discussed later in this chapter.
Tables 11on page 53 through Table 13 on page 55 provide quick reference
lists of important DTI/PRI commands. Table 14 on page 56 and Table 15 on
page 56 pertain to the NTRB51 TMDI card.
You must disable the D-channel and clock-controller daughterboards
before unseating circuit cards, otherwise the system will INIT and
momentarily interrupt call processing.
January 2002
WARNING