Hi Christian, Thanks for sending your comments to the list.
The latest SIP Service Examples draft is draft-ietf-sipping-service-examples-01.txt - take a look. See more comments below. Thanks, Alan Johnston WorldCom sip:[EMAIL PROTECTED] > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED]] > Sent: Sunday, May 12, 2002 11:21 AM > To: [EMAIL PROTECTED] > Subject: [Sip-implementors] Call Pickup > > > What is the best way to do call pickup? I see the following > alternatives: > > 1) I don't take the proposal in > draft-ietf-sip-service-examples-03.txt for serious, because > you can only pick up call that you can hear in the neighbours > room (which doesn't make too much sense in a multi-national > company etc.).Also, if the phone doing the pickup is also > registered with the same account as the phone that currently > rings (but with a lower q value), that would effectively > deregister the phone. > Right - REGISTER is no longer shown. > 2) Subscribing to the state of a phone as proposed in > draft-rosenberg-sip-call-package-00.txt? But is that draft > still active? Is XML too complicated? Who is doing it or > planning to do it? > The Call Package is now an official WG item of SIPPING, so this is moving forward. Jonathan is editing the document. > 3) Inviting all parties registered for the called id, but the > parties with a low q value with a special Content-Disposition > or Alert-Info; when the stateful proxy lowers its q value it > reinvites the party with a different Content-Disposition or > Alert-Info, so that it will ring normal. > Interesting use of Alert-Info. So the phone would not really ring but could display an indication that a call was available for pickup? A phone picking up would send a 200 OK to the INVITE? I'll think some more about this. > I would prefer 3 because that makes the job of the phone easy > (maybe even compatible with existing "legacy" phones) and it > should not be a too big problem for a proxy to invite all > parties that come into question with that special > information. And we don't need any new drafts for this. > To keep the phone simple, must of the call pickup logic can be moved to the proxy. However, the problem is how the picking phone signals the proxy that it wants to pickup. A HTML soft button could be used, perhaps. > Is there another suggestion? Or am I missing a point again? > > Christian > > _______________________________________________ Sip-implementors mailing list [EMAIL PROTECTED] http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
