GPRS PPP disconnection problem
Posted on 2003-12-02
I have an embedded device which we developed and we are trying to connect it to a GPRS network via a Nokia 6310i.
The embedded device has an RS-232 port running a TCP/IP stack over PPP (client) - which connects to the Nokia.
The embedded device now sends the appropriete AT commands and then we see that the PPP session starts with the GPRS network, and some information is negotiated such as PAP, magic number, etc. Suddenly (towards the end of the negotiation), the GPRS side (PPP server) sends a request to terminate and the embedded device of course agrees.
We replaced our embedded device with a PC Win2K as a PPP client and everything went OK. Thus we know that our SIM and AT commands are correct. Unfortunetly, we don't have a way to see the PPP negotiation messages between the PC and the other side.
Any help regarding why the GPRS side requested to terminate is very much appreciated.