Gordon Henderson wrote: > On Sat, 11 Oct 2008, Jorge Mendoza wrote: > > >> I founded this behaviour in the past. When the CO provides reversal >> polarity and the FXO port is configured to ignore polarity events, then >> a reversal polarity could be detected as ringing if the >> hardware/software is not well designed or configured. >> So, if the CO provides polarity reversal, why not set answer and release >> supervision to yes? >> > > We need the flexability to answer either way... > > Here in the UK the (BT) exchange will do a polarity reversal to signal > incoming CLI - it then send the CLI, *then* sends the ring signals, so > answering on polarity reversal would be wrong. > Answer supervision on reversal polarity applies only to outgoing calls, not incoming ones. > They also do a random polarity reversal most nights too - some sort of > automated line testing. Eg. from my home box: > > Oct 7 01:40:28 NOTICE[15581] chan_zap.c: Got event 17 (Polarity Reversal)... > Oct 9 03:53:06 NOTICE[19904] chan_zap.c: Got event 17 (Polarity Reversal)... > > Note the times... > Are they just warning alarms or they starts phantom calls?
Jorge > Gordon > > >> Jorge Mendoza >> >> >> Jim Duda wrote: >> >>> If by default Asterisk ignores all polarity events, then why >>> does it cause the Dialplan to start? >>> >>> I did set answeronplarityswitch to no, however, I have had >>> the problem occur once already, so, you suspicion might >>> be correct. >>> >>> Jim >>> >>> Tzafrir Cohen wrote: >>> >>> >>>> On Fri, Oct 10, 2008 at 05:51:29PM -0400, Jim Duda wrote: >>>> >>>> >>>>> Tzafrir, >>>>> >>>>> Thanks for the tip. I'm researching answeronpoliaryswitch. I suspect >>>>> this will solve my issue. I never would have know to look for this. >>>>> >>>>> Thanks much! You made my day :-) >>>>> >>>>> >>>> Hmm... I might have misled you. By default Asterisk ignores all polarity >>>> events. Using the polarity events can be a useful feature, but I suspect >>>> that it is not the cause of your original problem. >>>> >>>> >>>> >>> _______________________________________________ >>> -- Bandwidth and Colocation Provided by http://www.api-digital.com -- >>> >>> asterisk-users mailing list >>> To UNSUBSCRIBE or update options visit: >>> http://lists.digium.com/mailman/listinfo/asterisk-users >>> >>> >> _______________________________________________ >> -- Bandwidth and Colocation Provided by http://www.api-digital.com -- >> >> asterisk-users mailing list >> To UNSUBSCRIBE or update options visit: >> http://lists.digium.com/mailman/listinfo/asterisk-users >> >> > > _______________________________________________ > -- Bandwidth and Colocation Provided by http://www.api-digital.com -- > > asterisk-users mailing list > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users > _______________________________________________ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users