Priority Circuit For Modems With Phones Connected In Series; 5.10.1 Detecting A Busy Phone Line - Siemens Insys 56k Operating Manual

Function
5.10 Priority Circuit for Modems with Phones
Connected in Series
The Pocket Modem 56k gives a phone connected in series
priority, to make sure it interferes as little as possible with
the usage of the phone connection.
Command
AT-STE=0
AT-STE=1
AT-STE=2
AT-STE=3
AT-STE=4
AT-STE=5
AT-STE=6
AT-STE=7

5.10.1 Detecting a Busy Phone Line

During a dial-up attempt, the model detects the busy phone
line. The modem reports
Changing the loop voltage to detect the function – Detection
of a busy line (U1) – can be set with the help of AT commands.
Voltage
Loop voltage before a
connection is established
Loop voltage for busy
phone line.
22
Function 1 Function 2
(Chap. 5.10.1) (Chap. 5.10.2)
==
√
==
√
==
√
==
√
Function 3
(Chap. 5.10.3)
== ==
== ==
√
==
√
==
√
==
√
==
√ √
√ √
U1
Time
Pocket Modem 56K
(default)
LINE IN USE
AT-TTE=U1, U2, U3
Dezember 05