[asterisk-users] Hanging up a 3-way conference when middle user hangs up

[Paul Hales]

How does this compare to using the conference features on a SIP phone,
say a Snom? I have used a Snom many times for an ad-hoc conference,
without any troubles...

PaulH

On Sun, 2007-01-07 at 18:12 -0600, Lex Lethol wrote:
> Apparently asterisk's default way to a 3-way conference lets the user
> in the middle hangup and the other parties stay on the conversation.
> This is great some times but it creates quite a bit of problems when
> trunks dont have disconnect supervision or when trying to do
> accounting and billing on the user.
> 
> Here is the 'normal' situation when a user tries the setup a 3 way
> conference once the user is already on the phone with someone he
> called.
> 
> 1.  Press 'Flash' on the phone. Party B will now be placed on hold and
> you will hear a dial tone.
> 2. Dial party C's number or a pre-configured speed dial followed by
> '#', (you can engage in conversation).
> 3. Press 'Flash' to join both C and B to a single conference.
> 4. When you place the phone's handset on-hook, party B and party C
> will remain in conversation.
> 
> After step 4, B and C remain on the conversation and I am looking for
> a way to disable this without disabling 3 way calling.  Basically I am
> looking for a way to force asterisk hang up both B and C once the
> 'middle' user hangs up so this will not leave channels stuck on trunks
> without disconnect supervision.
> 
> Anyone know how to accomplish this?  Any comments appreciated.
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