6.5 Setting up the GPRS communicationThe GPRS interface may be set up but there is no communication.• Set the default gateway in the Ethernet settings submenu to "0".• Enable the default gateway from Network/GPRS if the GPRS interface isused as a default gateway.6.6 Establishing GPRS connectionThe GPRS connection may not be established.• Check that the SIM card has the correct PIN number settings and that it has notbeen locked due to entering the wrong number three times successively.• Check the PIN status from Tools/Modem Info.6.7 Restoring the GPRS connectionThe GPRS connection fails approximately after two minutes if the connectionchecking has been enabled in Network/Monitor but the correct IP has not been setto GPRS in ICMP Echo settings.• Set the correct IP to GPRS in Network/GPRS/ICMP Echo.Section 6 1MRS757105 BTroubleshooting62 RER601/603Technical Manual