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
on page 522.
Table 226: NTAK79 LEDs
LED
State
Definition
OOS
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.
ACT
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.
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.
YEL
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.
LBK
On (Green)
2 MB PRI is in loop-back mode.
Off
2 MB PRI is not in loop-back mode.
CC
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
NTAK79 2.0 Mb PRI card
522 Circuit Card Reference
July 2011
Summary of Contents for 1000 Series
Page 1: ...Circuit Card Reference Nortel Communication Server 1000 7 0 NN43001 311 04 04 July 2011 ...
Page 20: ...20 Circuit Card Reference July 2011 ...
Page 30: ...Introduction 30 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 116: ...Option settings 116 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 143: ...Figure 25 CP PIV card front Physical description Circuit Card Reference July 2011 143 ...
Page 148: ...NT4N39AA CP Pentium IV Card 148 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 287: ...Figure 86 Clock Controller Option 3 Operation Circuit Card Reference July 2011 287 ...
Page 302: ...NT5K21 XMFC MFE card 302 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 346: ...NT6D80 MSDL card 346 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 353: ...Figure 96 NTDK16 DLC Functional description Circuit Card Reference July 2011 353 ...
Page 461: ...Figure 147 Paging trunk operation Applications Circuit Card Reference July 2011 461 ...
Page 462: ...NT8D15 E and M Trunk card 462 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 500: ...NTAK09 1 5 Mb DTI PRI card 500 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 512: ...NTAK10 2 0 Mb DTI card 512 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 534: ...NTAK79 2 0 Mb PRI card 534 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 550: ...NTBK22 MISP card 550 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 560: ...NTBK50 2 0 Mb PRI card 560 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 595: ...Figure 165 MGC block diagram Introduction Circuit Card Reference July 2011 595 ...
Page 662: ...NTRB21 DTI PRI DCH TMDI card 662 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 668: ...NTVQ01xx Media Card 668 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 700: ......