Physical Description - Nortel Enterprise 1000 Reference Manual

Physical description

Table 41
NTAK79 LEDs (Part 1 of 2)
LED
OOS
ACT
RED
YEL
Succession Communication Server for Enterprise 1000 Circuit Card Reference Guide
• conversion of PCM commanding Laws (A-A, u-u, A-u, u-A)
• Card-LAN for maintenance communications
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 41.
State
On (Red)
Off
On (Green)
Off
On (Red)
Off
On (Yellow)
Off
NTAK79 2.0 Mb PRI card
Definition
The NTAK79 2MB PRI circuit card is disabled or out-
of-service.
The NTAK79 2MB PRI is not in a disabled state.
The NTAK79 2MB PRI circuit card is in an active
state.
The NTAK79 2MB PRI is in a disabled state. The
OOS LED will be red.
A red alarm state has been detected. This represents
a local alarm state of:
Loss of Carrier (LOS)
Loss of Frame (LFAS), or
Loss of CRC Multiframe (LMAS).
No red (local) alarm.
A yellow alarm state has been detected. This
represents a remote alarm indication from the far
end. The alarm may be either Alarm Indication (AIS)
or Remote Alarm (RAI).
No yellow (remote) alarm.
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