On 25 April 2012 18:05, Kevin P. Fleming <kpflem...@digium.com> wrote: > On 04/25/2012 11:54 AM, Steve Davies wrote: > >> A further question... It appears that for SIP endpoints, this facility >> only updates RPID and PAI headers? I have found that there appear to >> be 4 different SIP CID-update mechanisms "out there" as follows: >> >> - Update RPID and PAI (ITSP and trunks often understand this) >> - Update Contact: header (Aastra handsets use this) >> - A SIP INFO packet if "Supported: callerid" is specified (Older snom >> firmware uses this) >> - Update From: header if "Supported: from-change" is specified (RFC >> 4916, snom, Yealink) >> >> Are there existing plans to support any of these other methods? If >> not, I will almost certainly add them for my own use, and submit the >> code. > > > No, we have no plans at this time to go beyond RPID and PAI support. Those > two appear to cover all the current endpoints that we have been able to test > with, and many community members have also used with other endpoints and had > success.
Thanks for that, I'll have to test further and see whether all the devices we use support RPID/PAI. It would certainly be easier than messing about with headers that should not really be changed! > Changing the Contact header seems quite wrong; the display-name in a URI in > the Contact header is pretty much irrelevant. Changing the From header also > seems wrong; that should indicate who sent the initial INVITE, not who > redirected it. I don't think we'd want to merge patches that added support > for either of those mechanisms. The From: header change is a relatively recent RFC, but I've seen several handsets supporting it, and several non-Asterisk SIP stacks using this to achieve COLP updates. I completely agree that changing the Contact: header is daft, and I have no idea why Aastra use this method. Regards, Steve -- _____________________________________________________________________ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
