Nortel Networks 553-3001-211 manual Physical description, NTAK79 LEDs Part 1

Page 734 of 894 NTAK79 2.0 Mb PRI card

IMPORTANT!

Each MG 1000S that has a digital trunk must have a clock controller

clocked to an external reference clock.

Note: Clocking slips can occur between MG 1000S 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 234.

Table 234

NTAK79 LEDs (Part 1 of 3)

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 will be red.

553-3001-211 Standard 2.00 September 2004