I just realised my problem seems to be related to bug 0003710 - "0003710: 
[patch] Consultative transfers between asterisk servers". It's unclear from the 
bug info if this problem has been resolved yet. Anyone know?

Doug.

> -----Original Message-----
> From: Douglas Garstang 
> Sent: Monday, March 27, 2006 4:41 PM
> To: 'Asterisk Users Mailing List - Non-Commercial Discussion'
> Subject: Transfer Calls - REFER
> 
> 
> I made a call from 3254102 to 2944093. I then tried to do a 
> transfer to 3254107. 
> IP addresses have been changed to protect the innocent.
> Here's the REFER that the phone at 2944093 sends directly to Asterisk:
> 
> U 216.186.128.68:5060 -> 216.186.142.203:5060
> REFER sip:[EMAIL PROTECTED] SIP/2.0.
> Via: SIP/2.0/UDP 216.186.128.68;branch=z9hG4bKba3b074892377BD1.
> From: <sip:[EMAIL PROTECTED]>;tag=C06397B-C3C1D97A.
> To: "Test User" <sip:[EMAIL PROTECTED]>;tag=as33e7dd7c.
> CSeq: 2 REFER.
> Call-ID: [EMAIL PROTECTED]
> Contact: <sip:[EMAIL PROTECTED]>.
> User-Agent: PolycomSoundPointIP-SPIP_601-UA/1.6.3.0067.
> Refer-To: 
> <sip:[EMAIL PROTECTED];user=phone?Replaces=a13c692-349
> c9c70-7bd27d33%40172.31.99.4%3Bto-tag%3Das2a8d818b%3Bfrom-ta
> g%3D3DE1A6BE-7262B959>.
> Referred-By: <sip:[EMAIL PROTECTED]>.
> Max-Forwards: 70.
> Content-Length: 0.
> 
> Asterisk then goes and complains:
> 
> Mar 27 16:25:57 NOTICE[20511]: chan_sip.c:6734 
> get_refer_info: Supervised transfer requested, but unable to 
> find callid '[EMAIL PROTECTED]'.  Both 
> legs must reside on Asterisk box to transfer at this time.
> 
> There's NAT going on here too. The phone's real IP address is 
> 172.31.99.4. 
> I'm not really sure what the problem is except that it works 
> fine when there's no NAT involved. I can see the real IP 
> address in the dialog. I wonder if that's what is confusing Asterisk?
> 
> Doug.
> 
> 
> 
> 
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