Datasheet

INSYS Modem 336/56k 4.1 (UL) Functions
5.13 Priority Circuit for Modems with Phones Connected in Se-
ries
Not for INSYS Modem LL.
The INSYS Modem 336/56k 4.1 (UL) gives a phone connected in
series priority, to make sure it interferes as little as possible
with the usage of the phone connection.
Command Function 1 Function 2 Function 3
(Chap. 5.13.1 ) (Chap. 5.13.2) (Chap. 5.13.3)
AT-STE=0 == == == (default)
AT-STE=1 √ == ==
AT-STE=2 == √ ==
AT-STE=3 √ √ ==
AT-STE=4 == == √
AT-STE=5 √ == √
AT-STE=6 == √ √
AT-STE=7 √ √ √
5.13.1 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 – Detec-
tion of a busy line (U1) – can be set with the help of AT
commands.
LINE IN US
E
AT-TTE=U1, U2, U3
Spannung
Schleifenspannung vor
Beginn der Verbindung
U1
Schleifenspannung bei
besetzter Telefonlei-
tung.
Zeit
July 06 39