Datasheet

Operating Modes INSYS GSM 4.2
INSYS GSM 4.2 compact
34 Sep-06
Connections can be terminated as follows:
¾ Manually by the ATH command in online command mode
¾ If the remote terminal hangs up
¾ By idle connection control
¾ By activating an alarm input
¾ By DTR drop
4.2 Command Mode
4.2.1 Offline command mode
The offline command mode is the state after switching on or resetting the INSYS GSM.
You can address the INSYS GSM during offline command mode using AT commands.
4.2.2 Online command mode (local)
During a data connection, you can put the INSYS GSM into online command mode by
entering the escape sequence via the serial interface.
Requirements:
The data communication is perhaps active.
There has been no data traffic for at least one second.
Entering the escape sequence:
1. Swiftly enter the characters +++ (without <CR>).
2. Wait at least one second.
The response OK is displayed.
The device is in command mode.
3. Wait two more seconds before entering AT commands.
The data connection will remain established. You can terminate the data connection by
entering ATH. The INSYS GSM changes back to connection mode with ATO.