VEGA INSYS Modem GPRS 5.0 - Manual (Page 41)

INSYS GPRS 5.0 serial Connection
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For TCP Listen mode, the number of dialing attempts until a device is restarted
can be limited with the command AT**TCPLISTENWAITRST=<n>. For example,
the INSYS GPRS 5.0 serial is restarted with AT**TCPLISTENWAITRST=3 after the
third dialing attempt (20s+80s+320s). This will restart the dialing cycle. The de-
fault value for this setting is 255.
5.2.5 Manual connection setup
Establish a connection to an IP address or a host with domain name.
IP address <ip> with port <port> ATD<ip>:<port>
Domain Name <domain> with the port
<port> ATD<domain>:<port>
Response: Connect
The call was accepted; the transfer of data can begin.
5.2.6 Automatic connection setup (leased line)
With the leased line function, a preset destination is automatically dialed.
The connection setup and the connection itself are monitored.
If the connection can not be established (network failure, remote system does not
respond) or if the connection is terminated, the INSYS GPRS 5.0 serial will auto-
matically start reconnecting.
To limit the connection costs for inaccessible remote terminals (for each connec-
tion 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