That's because A is the "joining" point between B and C. If
either B or
C hung up, the remaining party would still be left.
This is a phone function, not an Asterisk one. From Asterisk's
perspective, phone A is simply on two simultaneous calls to B and C - it
has no idea that A is bridging the two calls together.
preethy varghese wrote:> Hi,
> I have an astrisk pbx installed on my system and i have
> registered two Aastra hardphones and one SJPhone(softphone) with
> that. Then i tested the following scenario
>
> A(Aastra) called B(Aastra)
>
> B answered the call
>
> I pressed conference button on the A ( A put B on hold)
>
> A called C(SJPhone) (It send an invite with isfocus )
>
> C answered the call
>
> I pressed conference button on the A again
>
> A B and C came in conference mode.
>
> Then when I hangup the phone A , call between the B and C is also
> disconnected.
>
> Any one could you explain me this scenario with the sip message
> sequence?
>
> What is the message sequence of a pbx centered conference?
>
> Thanks in advance.
>
> Preethy
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