> > An M20 for example will get a bit confused when a call comes in but it does > seem to recover after a few minutes (you'll see ringringringringringring as > the terminal output if you switch the logging to debug!). But I think the > only effective way is to divert all voice calls at the SIM. > > Perhaps there is an AT command to initialise a modem to refuse voice calls? > Don't think so. Actually sending an ATH0 after the first ring hangs the modem. Instead anybody knows in which cases the caller ID is diplayed by the gsm modem?
Infact if I phone to my sim number I see: RING +CLIP: "+393479336220",145 Instead when a foreign phones , I see only ring without the second line. Do you know in which cases GSM delivers Caller ID or not? Thanks Andrea
