FMA204 GSM settings, GPRS part
GPRS defines main parameters for FMA204: GSM operator APN and GPRS username and password (optional – depending on the operator), destination server IP and port, and allows to set protocol used for data transfers – TCP or UDP.
Some operators use specific authentication for GPRS session – CHAP or PAP. If any of these is used, APN should be entered as ‘chap:<APN>’ or ‘pap:<APN>’. I.e. if the operator is using APN ‘internet’ with CHAP authentication, it should be entered as ‘chap:internet’. Information about APN and authentication type should be provided by your GSM operator.