Nortel Networks 553-3001-211 manual Lineside T1 card block diagram, Seq

Page 186 of 894 NT5D11 and NT5D14 Lineside T1 Interface cards

“Man-Machine T1 maintenance interface software” on page 213 for information on T1 link maintenance. If the card detects that tests are being run or that alarms have been disabled through the MMI, this LED will light and will remain lit until these conditions are no longer detected, then it will turn off.

Functional description

Figure 27 shows a block diagram of the major functions contained on the lineside T1 card. Each of these functions is described on the following pages.

Figure 27

Lineside T1 card – block diagram

Front
panel
LEDs							Man/Machine Interface
		Micro-					External Alarm Interface
		controller
Card slot
Backplane addresses
		Card LAN
		interface					T1 Tx Tip
	Async card					T1 Interface	T1 Tx Ring	Backplane
								Common
	LAN link					(One for all	T1 Rx Tip	Peripheral
						24 channels)	T1 Rx Ring	Equipment
								connector
Controller		DS-30X
	Tx PCM	interface
card
				Digital		Line interface unit power
					Mux
				Gain/Loss
	Rx PCM				Seq.
				Pads
	Slot 1			Slot 2
Motherboard			Daughterboard
(16 channels)				(8 channels)
Power	+8.5 V dc	Reg		+5 V dc logic power
							553-6476
supplies
553-3001-211	Standard 2.00			September 2004