Hello,
ok, but does exist any sip phone where i can make the conference remotly (i.e. using a sip header, ...).

Thanks
----- Original Message ----- From: "Eric "ManxPower" Wieling" <[EMAIL PROTECTED]>
To: "Asterisk Developers Mailing List" <[email protected]>
Sent: Wednesday, April 05, 2006 12:01 PM
Subject: Re: [asterisk-dev] SIP Phone Conference from Asterisk.


md wrote:
Hi,
Is possible put in conference a sip phone where there are two calls (one active and the other held) from Asterisk? Is there any SIP header to activate the conference in a SIP phone remotly?

El escenario es:

1. SIP A calls SIP B: call 1
2. SIP A calls SIP C: call 2 --> call 1 held; call 2 active
3. ASTERISK APPLICATION notify SIP A for put call 1 and call 2 in conference.

Is the step 3 possible? Is there any SIP header to indicate to a SIP phone

Step 3 is not possible in the way you describe. However, many, many SIP phones support it within the phone. Asterisk just sees two calls. The phone does the audio mixing inside the phone. Polycom, Cisco, and SIPura phones do this. I'm sure most other SIP phones also do it in this way. This feature may be called "3-Way Calling".
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