Solution for missed call indication on multiple registration

New features you'd like see on SIP Sorcery
Post Reply
ozimarco
Posts: 51
Joined: Fri Nov 18, 2011 3:49 am
Location: Lower Chittering, WA

Solution for missed call indication on multiple registration

Post by ozimarco » Wed Nov 26, 2014 8:35 am

Hi Aaron,

When we have the same SS account registered on a number of devices and an incoming call is answered on one device, every other device will show this as a 'missed call', even though it was answered, just not on those particular units. Someone on Whirlpool (http://whrl.pl/Rd9mwj) suggested this:
They should be sending a cancel message with a "call completed elsewhere" reason code and the call should not be logged as a missed call at any handset.
I never realised that this solution was technically possible and am still not convinced that it is. What is your opinion? I mean, it would be awesome if this could be implemented but I am not getting my hopes up.

Thanks,
Mark
ISP: Telecube ADSL2+, $79 for 250GB (bundled with phone) on regional Telstra exchange
VSPs: MyNetFone, Telecube, Maxotel, Freshtel and others via SIPSorcery
Hardware: Asus DSL-AC68U + Siemens Gigaset A580IP and Yealink T22P.

User avatar
Aaron
Site Admin
Posts: 4551
Joined: Thu Jul 12, 2007 12:13 am

Re: Solution for missed call indication on multiple registra

Post by Aaron » Wed Nov 26, 2014 9:24 am

To the best of my knowledge it's almost certainly not possible. When one of the forked calls is answered the CANCEL request is sent to any other forked call still in progress which is what causes them to stop ringing. The missed call indication comes from the device itself. The SIP standard does not distinguish between a CANCEL request that was generated because the calling party gave up (in this case that would be a genuine missed call) and a CANCEL request that was generated because the call was answered elsewhere.

It would be possible to add an extra header to the CANCEL request to distinguish between the two cases but no device will support it because it's not part of the standard.

I have the same problem. Calls that get answered on my Siemens handset leave a missed call indication on my Cisco IP Phone.

ozimarco
Posts: 51
Joined: Fri Nov 18, 2011 3:49 am
Location: Lower Chittering, WA

Re: Solution for missed call indication on multiple registra

Post by ozimarco » Wed Nov 26, 2014 12:48 pm

Thanks, Aaron. That clears it up for me.
ISP: Telecube ADSL2+, $79 for 250GB (bundled with phone) on regional Telstra exchange
VSPs: MyNetFone, Telecube, Maxotel, Freshtel and others via SIPSorcery
Hardware: Asus DSL-AC68U + Siemens Gigaset A580IP and Yealink T22P.

Post Reply

Who is online

Users browsing this forum: No registered users and 1 guest