TrimTrac ProE Locator, Technical Manual

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TrimTrac ProE Locator Technical Manual v2.0e 19
recorded in the message log if it’s the last available status when the
TRANSMIT Timeout, T3, expires.
8=TCP Connection
Failure Communication Mode is set “1=GPRS” or “2=AutoSelect” and the
device is registered with a network on which GPRS service is available
and a PPP session was successfully opened, but the TCP connection
with the server application was not established. This will occur if the
server application’s GPRS Destination Address is not correctly set in
the TrimTrac ProE’s GPRS communication parameters or if the server
application is offline.
9=Session Protocol
Failure Communication Mode is set “1=GPRS” or “2=AutoSelect” and the
device is registered with a network on which GPRS service is available
and a PPP session was successfully opened, but the TrimTrac Session
Protocol or TCP was not satisfied. This will occur if the server
application fails to send a properly formatted acknowledgement in
response to the TrimTrac Session Protocol or TCP sign-on message.
The TrimTrac ProE tries once for TCP or 3 times for UDP at 15 second
intervals; if no acknowledgement is received, the session is dropped and
re-established. For UDP, a session will be established even if an invalid
/ unreachable Port Number is configured and a session sign-on will be
attempted; in this case, a TrimTrac Session Protocol failure could also
indicate an invalid port number.
Table 7, GSM Status Codes Explained