Interfaces and Terminals as of I7.8
System Interfaces
33
sy
d-
023
9/2.
4
– I7.
8
– 0
7
.2009
2. 2. 2
Analogue terminal interfaces
This 2-wire interface supports the following off-the-shelf analogue terminals:
•
Analogue phones with DTMF or pulse dialling (earth key is not supported)
•
Radio units for cordless phones
•
Two-wire door intercoms with DTMF control functions
•
Group 3 fax machines
1)
•
Answering machines
•
Modem
No call charges are transmitted to the connected terminals via analogue terminal
interfaces.
CLIP display is possible (see
ff.)
One analogue terminal interface per system can be configured for connecting a
general bell.
Fig. 16
a/b terminal interfaces
1)
Transmission with the T.38 protocol is recommended for Fax over IP.
PBX
a/b
a/b
Fax 3
DTMF / pulse dialling
General call
a/b
Two-wire door intercom system
with DTMF control functions
a/b