Insys Modem 56k small INT 2.0 11-02-01-01-43.003 Manuale Utente
Codici prodotto
11-02-01-01-43.003
Technical Data
INSYS Modem 56k small INT 2.0/USB 1.0
92
June 06
14.6 Telephone Interface
Layout of the RJ12 Connector and the RJ45 Jack
Pin
Description
Pin
Description
1 NC
4
b1
2 a2
5
b2
3 a1
6
NC
Meaning of the Signals:
a1, b1: Incoming phone lines
(e.g. exchange connection or PBX)
a2, b2: They are used to connect a telephone in series. In idle state, a2 and b2
are connected with a1 and b1 via a loop current connector. a2 and b2 are
disconnected as soon as the modem occupies the line.
disconnected as soon as the modem occupies the line.
RJ 12 connector directed
backwards
backwards
RJ 12 connector front
b2 b1
a2 a1