Phone Interface - Siemens Insys 56k Operating Manual

Technical Data
12.5

Phone Interface

Pin RJ12
Name
plug
1
2
Description:
a1 and b1 are the incoming phone lines (e.g. outside line or private branch exchange).
a2 and b2 are used to connect a phone in series. In idle state, they are connected to a1
and b1 via a loop current connector. a2 and b2 are detached as soon as the modem uses
the line.
72
RJ 12 plug with nose
downward
RJ 12 plug front
Pin RJ45
socket
NC 3
a2 4
RJ 12 and RJ 45
Name
a1
b1
Pocket Modem 56k
E W
b2 b1
a2 a1
Pin Name
5 b2
6 NC
Dezember 05