Physical Description - Avaya Nortel Communication Server 1000 Reference

NTAK79 2.0 Mb PRI card
Note:
Clocking slips can occur between systems that are clocked from different Central Offices
(COs), if the COs are not synchronized. The slips can degrade voice quality.

Physical description

The NTAK79 uses a standard 9.5" by 12.5" multi-layer printed circuit board. The faceplate is
7/8" wide. The NTAK79 circuit card has a total of seven faceplate LEDs. Five of the LEDs are
directly associated with the operation of the Primary Rate interface (PRI). The remaining two
LEDs are associated with the on-board Clock Controller and the on-board D-channel interface
(DCHI). The LEDs are described in
Table 226: NTAK79 LEDs
LED
OOS
ACT
RED
YEL
LBK
CC
522 Circuit Card Reference
State
On (Red) The NTAK79 2 MB PRI circuit card is disabled or out-
of-service.
Off The NTAK79 2 MB PRI is not in a disabled state.
On (Green) The NTAK79 2 MB PRI circuit card is in an active
state.
Off The NTAK79 2 MB PRI is in a disabled state. The OOS
LED turns red.
On (Red) A red alarm state is detected. This represents a local
alarm state of: Loss of Carrier (LOS) Loss of Frame
(LFAS), or Loss of CRC Multiframe (LMAS).
Off No red (local) alarm.
On (Yellow) A yellow alarm state is detected. This represents a
remote alarm indication from the far end. The alarm
can be either Alarm Indication (AIS) or Remote Alarm
(RAI).
Off No yellow (remote) alarm.
On (Green) 2 MB PRI is in loop-back mode.
Off 2 MB PRI is not in loop-back mode.
On (Red) The clock controller is switched on and is disabled by
the software.
On (Green) The clock controller is switched on and is either locked
to a reference or in free run mode.
Flashing (Green) The clock controller is switched on and attempting to
lock on to a reference (tracking mode). If the LED
Comments? infodev@avaya.com
Table 226: NTAK79 LEDs
Definition
on page 522.
July 2011