44210/49210-0798 <90-00025>
P
AGE
3
F
IG
. 1 - F
UNCTIONAL
S
CHEMATIC
, 44210/49210
37
RING DETECT #1
38
RING DETECT #2
43
LINE SELECT #1
44
LINE SELECT #2
(RING)
(TIP)
(TIP)
(RING)
2-WIRE LINE #1
2-WIRE LINE #1
TO RJ11
TO RJ11
41
42
23
24
50
AUDIO MONITOR
40
OFF HOOK
–21 TO –56 VDC
GND
RCVRs
TTL
Interface
DRVRs
RCVRs
RS-232
Interface
DRVRs
RCVRs
RS-422
Interface
DRVRs
RCVRs
RS-485
Interface
DRVRs
MICRO PROCESSOR
IC
A12-49210-00
TWO-LINE
INTERF
ACE
CIRCUIT DESCRIPTION
