Functional Description - Nortel Enterprise 1000 Reference Manual

Functional description

Figure 10
Universal trunk card – block diagram
Input/output
interface
control
Front
panel
LED
Micro-
controller
Card slot
Back-
address
plane
Card LAN
interface
Async card
LAN link
Tx PCM
Rx PCM
Con-
troller
card
5.12 MHz
interface
clock
1 kHz
frame sync
Succession Communication Server for Enterprise 1000 Circuit Card Reference Guide
Analog Trunk Cards - NT8D14 Universal Trunk Card
Figure 10 shows a block diagram of the major functions contained on the
universal trunk card. Each of these functions are described on the following
pages.
PCM
Address/
data bus
PCM
DS-30X
Signaling
and status
Control
logic
Trunk interface units 0–3
Codec
detection
Trunk interface units 4–7
Codec
detection
Trunk
signaling
interface
Page 49 of 236
Analog
XFMR
Tip
hybrid
Ring
Signaling
relays
*
*
Signal Signal
hybrid
Analog
XFMR
Tip
hybrid
Ring
Signaling
relays
*
*
Signal Signal
hybrid
Analog
trunk facilities
(CO/FX/WATS,
DID, tie, RAN,
or paging)
Analog
trunk facilities
(CO/FX/WATS,
DID, tie, RAN,
or paging)
*
Signaling
lines for
RAN or
paging
control
553-CSE6197