Nortel Networks 553-3001-211 NT8D14 Universal trunk card block diagram, Codec Interface Control

Page 558 of 894 NT8D14 Universal Trunk card

Functional description

Figure 111 shows a block diagram of the major functions contained on the NT8D14 Universal Trunk card. Each of these functions is described on the following pages.

Figure 111

NT8D14 Universal trunk card – block diagram

						Trunk interface units 0–3
		Input/output		Codec
			interface
			control	PCM		Analog	XFMR	Tip
						hybrid
								Ring	Analog
						Signaling
									trunk facilities
						relays
								*	(CO/FX/WATS,
Front						Signal	Signal	*	DID, tie, RAN,
				Address/					or paging)
panel				data bus		detection	hybrid
	LED
			Micro-
			controller			Trunk interface units 4–7
Back-	Card slot
	address
plane				Codec
			Card LAN	PCM		Analog	XFMR	Tip
			interface			hybrid
	Async card							Ring	Analog
						Signaling
	LAN link								trunk facilities
						relays
								*	(CO/FX/WATS,
	Tx PCM					Signal	Signal	*	DID, tie, RAN,
									or paging)
Con-	Rx PCM					detection	hybrid
troller			DS-30X
card	5.12 MHz
			interface		Trunk
	clock								* Signaling
				Signaling	signaling
	1 kHz				interface				lines for
				and status
									RAN or
	frame sync								paging
									control
				Control
				logic					553-CSE6197
553-3001-211		Standard 2.00		September 2004