44210/49210-0798 <90-00025>
P
AGE
15
F
IG
. 9 - P
IN
D
ESIGNATIONS
, 44210 M
ODEM
56
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1
CIRCUIT SIDE
OF PC BOARD
COMPONENT SIDE
OF PC BOARD
MPI
MPI
MPI
Audio Monitor
MPI
MPI
Line Select #1
Line Select #2
2-Wire Line #1
2-Wire Line #1
Off Hook
Ring Detect #1
Ring Detect #2
-21 to -56 VDC
DTR (TTL)
RTS (TTL)
RXD (TTL)
TXD (TTL)
MPO (TTL)
CD (TTL)
2-Wire Line #2
2-Wire Line #2
TD (RS-232)
MPI (TTL)
DTR (RS-232)
RTS (RS-232)
Ground
MPO
CD (RS-232)
MPO (RS-232)
MPO
RD (RS-232)
RX- (RS-422)
RX+ (RS-422)
CD- (RS-422)
CD+ (RS-422)
DTR+ (RS-422)
DTR- (RS-422)
TX+ (RS-485)
TX- (RS-422)
TX+ (RS-485)
TX- (RS-485)
RX- (RS-485)
RX+ (RS-485)
INSTALLATION
