Instruction manual

Installation
82 025-9416
J1 Centronics
50-pin Female
1
12
P1
GND
TX AUDIO LO
TX AUDIO HI
COR
NO
-
A PTT
COM
-
A PTT
NC
-
A PTT
NO
-
AUX PTT
COM
-
AUX PTT
NC
-
AUX PTT
RX AUDIO LO
RX AUDIO HI
1
12
P2
GND
TERM BUSY
1
BCD ZONE
2
BCD ZONE
4
BCD ZONE
8
BCD ZONE
NO
-
DIGPTT
COM
-
DIGPTT
NC
-
DIGPTT
DIG MODE
REQ XMTR
DIG DATA
Figure 47. Model 640 to Model 68 Direct Interface Cable
66-Type Punchdown Block Installation
The punchdown block interface is more complicated, but also more flexible. Figure 48 illustrates
the basic connections for this method of installation.
Remote PC
Model 640
Model 68
Part No. 709-0004
PC, console kit,
or dumb terminal
Interface via “RJ” 4-wire
or 6-wire cables and
RJ66M425 terminal
block, or direct cross-
wire to telco
terminations.
Part No. 709-0004
TELCO CO
Figure 48. Model 640 to Model 68 Punchdown Block Interface