Functions
INSYS GSM 4.3
12.10
Establishing or Accepting a Data Connection
The INSYS GSM 4.3 can call another modem via the GSM network and establish a
data connection. After dialling a phone number, the INSYS GSM 4.3 synchronises
with the called modem and opens a data connection with the transmission speed
allowed by the GSM network. This is usually 9600 bit/s.
The speed, which is set at the serial interface of the INSYS GSM 4.3 at the time of
connection establishment, will not be changed.
All incoming characters are transmitted to the other (called) modem during the ac-
tive data connection. Therefore, AT commands are not processed during a connec-
tion. The INSYS GSM 4.3 must be changed to command mode again using an "Es-
cape sequence" that it processes AT commands again during an active connection.
Then, the local INSYS GSM 4.3 processes the entered characters as AT commands
and does not transmit them to the remote terminal. A remote INSYS GSM 4.3 can
be changed to command mode during an active data connection using the function
"Remote configuration".
The INSYS GSM 4.3 can accept an incoming connection in the same way. It an-
swers after the configured number of ring tones and opens a connection.
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