Michael 'Mickey' Lauer wrote: > > I want to add a GPRS availability signal to ogsmd. We have some > Calypso-specific ways of doing that, but I'd rather implement it only > using > GSM 07.07 standard commands. > > Does anyone know whether +CGREG and +CREG really refer to different > services > (data vs. circuit) when a mobile station supports both? >
I think there is no 07.07 standard command available just to monitor GPRS availibility. +CGREG can be used only to monitor GPRS registration state of the mobile (attached, not attached, trying to attach, ...). So, as soon as you have initated the GPRS attach, you can use the +CGREG command/indicator to check GPRS availibility. But depending on your operator you will be charged already just for the plain attach! Your terminal equipment may support vendor specific commands/indicators to check for GPRS coverage, e.g. for most of the Cinterion modules you can use AT^SMONG. Regarding the relation between +CREG and +CGREG: I think the +CREG command can be used to check the network registration state of your mobile. It is independent from +CGREG state. But +CGREG state depends on +CREG state. You will never attach without being network registered first. But there are similarities: if your network registration state is "registered roaming" (+CREG:5) and then you attach to GPRS, then your GPRS registration state on success will be "GPRS registered roaming" (+CGREG:5). Also both commands/indicators will show you the same <lac> and <ci> in registered state. BR Peter -- View this message in context: http://n2.nabble.com/%2BCREG-vs.-%2BCGREG-tp1633729p1657332.html Sent from the Openmoko Devel mailing list archive at Nabble.com. _______________________________________________ devel mailing list devel@lists.openmoko.org https://lists.openmoko.org/mailman/listinfo/devel
