asterisk users - Jan 2005 - three way call using sip

Hi, i cant make a three way call using grandstream phones (BT-100) and
asterisk using sip, is this supported or i need a zap interface?
thanks

mmiranda@americatel.com.sv wrote:
> Hi, i cant make a three way call using grandstream phones (BT-100) and
> asterisk using sip, is this supported or i need a zap interface?
The BT101 cannot to supervised transfers or 3-way calling.

The BT100's do support conferencing, most SIP phones do. But how does your
Asterisk connect you to the PSTN? Through a Zap interface? If so, what kind;
or through a VoIP provider like BroadVoice, NuFone, LookieLoo, VoipJet,
VoicePulse? 

You basically need to make sure your Asterisk server has access to more than
1 line. If it does, then you should be able to 3-way call without any
problems.



-----Original Message-----
From: asterisk-users-bounces@lists.digium.com
[mailto:asterisk-users-bounces@lists.digium.com] On Behalf Of
mmiranda@americatel.com.sv
Sent: Friday, January 21, 2005 1:20 PM
To: asterisk-users@lists.digium.com
Subject: [Asterisk-Users] three way call using sip

Hi, i cant make a three way call using grandstream phones (BT-100) and
asterisk using sip, is this supported or i need a zap interface?
thanks
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I connect to the PSTN using cisco as5400 gateways, this cisco devices have
E1's to a DMS300 switch. I mean, i configured sip channels (in and oout) to
these gateways, i dont have any special hardware in the asterisk server.
thanks

-----Original Message-----
From: asterisk-users-bounces@lists.digium.com
[mailto:asterisk-users-bounces@lists.digium.com]On Behalf Of Paul Rodan
Sent: Friday, January 21, 2005 12:51 PM
To: 'Asterisk Users Mailing List - Non-Commercial Discussion'
Subject: RE: [Asterisk-Users] three way call using sip


The BT100's do support conferencing, most SIP phones do. But how does your
Asterisk connect you to the PSTN? Through a Zap interface? If so, what kind;
or through a VoIP provider like BroadVoice, NuFone, LookieLoo, VoipJet,
VoicePulse? 

You basically need to make sure your Asterisk server has access to more than
1 line. If it does, then you should be able to 3-way call without any
problems.



-----Original Message-----
From: asterisk-users-bounces@lists.digium.com
[mailto:asterisk-users-bounces@lists.digium.com] On Behalf Of
mmiranda@americatel.com.sv
Sent: Friday, January 21, 2005 1:20 PM
To: asterisk-users@lists.digium.com
Subject: [Asterisk-Users] three way call using sip

Hi, i cant make a three way call using grandstream phones (BT-100) and
asterisk using sip, is this supported or i need a zap interface?
thanks
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http://lists.digium.com/mailman/listinfo/asterisk-users
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Hi!
> According to this only the BT102D supports "conferencing" aka
3-way
> calling:
> http://www.grandstream.com/Product_Spec.pdf
This is vaporware, the product was cancelled. Anyway, with a recent 
firmware you can do attended transfers with the BudgeTone, but no phone 
based 3-person-conferencing.

Cheers, Philipp