18 Aug
2021
18 Aug
'21
7:58 p.m.
On Wed, Aug 18, 2021 at 1:30 PM Antony Stone <
Antony.Stone(a)kamailio.open.source.it> wrote:
On Wednesday 18 August 2021 at 13:40:25, David
Villasmil wrote:
Yes, if your app doesn't support it, you can't expect it to do it, right?
You would call the API uuid_kill on the B-leg of your call, meaning the leg
connected to the PBX.
In freeswitch you have the uuid_hold, etc api:
https://www.freeswitch.org/confluence/plugins/servlet/mobile?contentId=1966
741#content/view/1966741
You call the API uuid_hold [uuid] or uuid_hold off [uuid] to take the
channel out of hold.
UUID in freeswitch is what uniquely identifies a given channel.
But, would that not perform the hold function on the FreeSwitch server?
And, if after putting it on hold, I need to transfer a call to another
number
/ channel, that transfer would also take place on the FreeSwitch server?
Correct
Or am I misunderstanding, and FreeSwitch can pass the
instruction to
"place
the call (channel if you prefer) on hold" on to the PBX system which my
existing client application is placing its calls through?
Correct.
In effect, your app would call into freeswitch and then in freeswitch you
would do anything your app can't do. Everything from FS' point of view.
When you say:
“However, my understanding of a B2BUA is that *it* would then start
handling the state of the calls itself - whether they're on hold, routing
the transfers, etc.”
This is correct, that’s how B2BUA works, but you can send an API to fs
via
ESL (tcp connection on port 8021) to put on hold
not just your channel,
since that would simply send a reconly to your app, but also the B-leg of
the call.
This all sounds as though I am getting FreeSwitch to "do the work" and
manage
the hold/transfer/resume/conference/whatever itself. I could do that with
Asterisk (which I already know, whereas I haven't used FreeSwitch), but it
isn't a solution to my needs.
I need something which will *tell the existing PBX* to do these things
(and
it's probably not running FreeSwitch), in just the same way as pressing
the
buttons on a competent SIP phone such as Yealink or Polycom would tell the
PBX
to do it.
Antony.
--
The Magic Words are Squeamish Ossifrage.
Please reply to the
list;
please *don't* CC
me.
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