Nortel Networks Circuit Card - Manual (Page 34)

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