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