Nortel Circuit Card Installation Manual page 34

Page 34 of 906 Overview
Figure 2
Typical IPE analog line card architecture
Input/output
Front
panel
LED
Card slot
address
Back-
plane
Async card
LAN link
Tx PCM
Rx PCM
Con-
troller
card
5.12 MHz
clock
1 kHz
frame sync
Power supplies
553-3001-211 Standard 3.00
interface
control
PCM
Address/
data bus
Micro-
controller
Card LAN
PCM
interface
DS-30X
interface
Signaling
and status
Control
Control
logic
August 2005
Codec
Codec
Line
Line interface unit power
signaling
interface
Line Tip
Interface
Ring
Unit
Line Tip
Interface
Ring
Unit
553-6150