VEGA INSYS Modem GPRS 5.0 - Manual (Page 40)

Connection INSYS GPRS 5.0 serial
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Alternatively, the settings for TCP Listen can be entered using the terminal pro-
gram.
Automatic Connection acceptance ATS0=2
Save this setting AT&W
Set the TCP data port AT**TCPLISTENPORT=1234
Activate TCP Listen AT**TCPLISTEN=1
Save settings AT**SAVE
Perform RESET,
accept all parameters AT**RESET
The successful dial-up into the GPRS network is displayed after the startup with
the message +PPP-IP SETUP; the INSYS INSYS GPRS 5.0 serial can now be reached
via its IP address.
If the connection can not be established (network failure, etc.) or if the connection
is terminated, the INSYS GPRS 5.0 serial will automatically start reconnecting.
To limit the connection costs for failed connection setups (for each connection
setup data packets are created and billed), the delay time will increase for every
new repeated attempt.
20 seconds after restart or if the last connection setup was successful
80 seconds after the first failure
320 seconds after the second failure
1280 seconds after the third failure
1 hour for each additional failure