Modem with network registration doesn´t ping

Legacy Legacy AirPrime modules
1

Hello,

I am trying to solve a problem related to GPRS. I have developed a program that works with a GPRS conection. The ME has IP and it is attached to the network according to at command responses but communication doesn´t work. Does anybody found this problem before?

Thank you.

2

There surely is no wavecom developer who hasn’t encountered that problem. Could you be a little more specific?

3

Sorry, explanation must be a little short.

My system is based on an field equipment with a Q24Plus Modem connected to a Front End. The problem found is that, after a perfect boot and exchange of GPRS data, a few of the modems ( 3 out of 200 aprox. ) do not reply to any question of the Front End. Even a response to “ping” is not received. A Customer Application developed with Open AT is running always in the modem. In this case, when a Modem fails to communicate, program is running perfectly and any at comand question by the serial port stands that everything about net registration, gprs registration, network attachment is working well.

Thanks