Hello,

I'm using Thomson/Technicolor ST2030S hardphones with Asterisk 1.6.
Changing from 1.6.1.18 to 1.6.2.6, I can see a change in Pickup's behaviour
and I'm a bit confused about it.

With 1.6.2.6, when extension 7791 is calling extension 7792, I can see
INVITE messages coming in and out Asterisk.
I can also see a NOTIFY message advertising this call to subscriber 7793,
for instance.
Here is an extract of this message :

NOTIFY sip:[email protected]:5060;user=phone SIP/2.0
<snip>
Call-ID: [email protected]
<snip>
Content-Length: 212


>From then, if BLF 7792 on extension 7793 is pressed, then an INVITE message
is send with :
INVITE sip:*[email protected]:5060;user=phone SIP/2.0
<snip>
Replaces: [email protected]
<snip>

This Replaces header refers to RFC3891 which is not yet supported in
Asterisk (see http://www.voip-info.org/wiki/view/Asterisk+SLA)

This INVITE fails with :
<snip>
chan_sip.c: Trying to pick up 7...@subs
<snip>
app_directed_pickup.c: No target channel found for 7792.


If I'm dialing *87792 instead of using BLF, then I'm entering the dialplan
part in which there is Pickup(${EXTEN:2...@pickupmark) and the call is
correctly pickup.



So my understanding is :
when upgrading from 1.6.1 to 1.6.2, Asterisk must somehow advertise a newly
supported SIP capability which is now used by ST2030S hardphones to build
Pickup requests.

My question is :
- is my understanding correct ?
- if positive, is there a way to tame asterisk to behave appropropriately ?

Regards
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