Figure 7 Typical Simple Digital Switching System
STo0
STi0
8980 used
as
speed
switch
IMP8980
Dx
Dr
Dr
STo0
STi0
MT9964
Filter/Codec
Signalling
Logic
Line Divider
and
2- to 4-
Wire
Converter
8980 used
in message
mode for
control and
signalling
IMP8980
Line Interface Circuit with Filter/Codec
Figure 8 Simple Digital Switching System
Line Interface Circuit
with Codec (e.g. 8964)
8
Line 1
Speech
Switch
8980
8
STi0-7
STo0-7
STi0-7
Controlling
µprocessor
.
.
.
8
STo0-7
Repeated for Lines
2 to 255
.
.
.
Repeated for Lines
2 to 255
8
Control &
Signalling
8980
Line Interface Circuit
with Codec (e.g. 8964)
Line 256
Figure 9 Non-Blocking 16x16 Switch
8980
#1
STi0/7 STo0/7
IN 0/7
OUT 0/7
8980
#2
STi0/7 STo0/7
OUT 8/15
IN 8/15
8980
#3
STi0/7 STo0/7
8980
#4
STi0/7 STo0/7
6
© IMP, Inc.
IMP8980D DS-5-00
A1PROS [ A1 PROS CO., LTD. ]
