You may also try displace_session at beginning of processing, and then stop displacing on answer by using execute_on_* functions family. 
However, we faced some strange issues with displace and ringback, so still not a 100% working method.

I've created https://freeswitch.org/jira/browse/FS-9233 about displace behavior.

2016-09-14 13:42 GMT+03:00 David Villasmil <david.villasmil.work@gmail.com>:
I don't see why answering the call, but if you like it that way, good!
Happy to help.

On Wed, Sep 14, 2016 at 12:40 PM, Dmitry Mordovin <d.mordovin@dwide.com> wrote:
Yes,

<extension name="srv_sctv">
        <condition field="destination_number" expression="^12345$">

          <!-- 1. Answer & welcome -->

          <action application="answer"/>
          <action application="set" data="continue_on_fail=true"/>

          <action application="playback" data="/opt/freeswitch-share/fs_sounds/ring_welcome.wav"/>

          <!-- 2. Setup hold music & other settings -->
          <action application="set" data="ignore_early_media=true" />
          <action application="set" data="instant_ringback=true" />
          <action application="export" data="hold_music=local_stream://xmoh_0_2_1" />
          <action application="set" data="transfer_ringback=local_stream://xmoh_0_2_1"/>
          <action application="set" data="ringback=local_stream://xmoh_0_2_1"/>

          <!-- 3. Call to customer -->
          <action application="set" data="hangup_after_bridge=true"/>

          <action application="bridge" data="[leg_timeout=20]sofia/gateway/gw1/79262410000@wg1|[leg_timeout=20]sofia/gateway/gw1/79262411111@gw1"/>
          <!-- Second try in 5 seconds -->
          <action application="playback" data="{timeout=5000}local_stream://xmoh_0_2_1"/>
          <action application="bridge" data="[leg_timeout=20]sofia/gateway/gw1/79262410000@wg1|[leg_timeout=20]sofia/gateway/gw1/79262411111@gw1"/>

          <!-- 4. Bridge fail -->
          <action application="playback" data="/opt/freeswitch-share/fs_sounds/ru/connection_not_established.mp3"/>
          <action application="hangup"/>
        </condition>
</extension>

DM


On 09/14/2016 02:29 PM, David Villasmil wrote:
Can you show your dialplan?

On Wed, Sep 14, 2016 at 12:27 PM, Dmitry Mordovin <d.mordovin@dwide.com> wrote:
I start use MOH instead play file, this solve part of problem.

sleep replace with playback & timeout

Not good solution, but works, enough.

I thinking, possible to make one leg to extension with MOH and in conference, call to customer.
When customer answer, disconnect MOH leg from conference.



On 09/14/2016 11:31 AM, Gregor Nanger wrote:
Just post info for others. As I see David use preanswer and your config answer. Is this solution??

2016-09-14 1:17 GMT+02:00 Dmitry Mordovin <d.mordovin@dwide.com>:
Hi,

Thank you David, your config sample help me!

DM


On 09/13/2016 06:25 PM, David Villasmil wrote:
Hello,

I got that. I think it might work :)
Let him try it :)

Something like:

    <extension name="Local_Extension">
      <condition field="destination_number" expression="^(9.*)$">
        <action application="pre_answer"/>
        <action application="playback" data="local_stream://moh"/>
        <action application="bridge" data="[leg_timeout=5]user/1001@${domain_name}"/>
        <action application="sleep" data="5000"/> 
        <action application="bridge" data="[leg_timeout=5]user/1002@${domain_name}"/>
        <action application="playback" data="/opt/freeswitch-share/fs_sounds/ru/connection_not_established.mp3"/>
        <action application="hangup"/>
      </condition>
    </extension>

David

On Tue, Sep 13, 2016 at 4:19 PM, Don Hawkins <hawkins@hawkinsegroup.com> wrote:

He wants the second attempt to bride to be transparent and hold music to pay during the sleep time. Had to read it a few times, unfortunately can't help.

Sincerely,
Don Hawkins

Sent from my NationPCS® Nexus 6.


On Sep 13, 2016 9:18 AM, "David Villasmil" <david.villasmil.work@gmail.com> wrote:
Hello,

Not sure i understood you goal, but I receive the INVITE, and start sending moh until the call is answered, like this:

    <extension name="Local_Extension">
      <condition field="destination_number" expression="^(9.*)$">
        <action application="pre_answer"/>
        <action application="playback" data="local_stream://moh"/>
        <action application="bridge" data="user/${dialed_extension}@${domain_name}"/>
        <action application="hangup"/>
      </condition>
    </extension>

You could do something similar.

Regards,

Dacud



On Tue, Sep 13, 2016 at 3:56 PM, Dmitry Mordovin <d.mordovin@dwide.com> wrote:
Hello,

I can't figure out how to configure hold music to play from begin extension till customer answer.
The problems is:
 - Hold music play while bridge calling to customer only and silence while sleep 5 sec before second try
 - Hold music begin play .wav from start each time when bridge switch to next route.

Any ideas how to configure hold music whole call session and, start playing after ANSWER (1 step) and stop play when customer answer(3 step) or bridge fail (4 step)?

My config:

<extension name="srv_sctv">
        <condition field="destination_number" expression="^12345$">

          <!-- 1. Answer & welcome -->

          <action application="answer"/>
          <action application="set" data="continue_on_fail=true"/>

          <action application="playback" data="/opt/freeswitch-share/fs_sounds/ring_welcome.wav"/>

          <!-- 2. Setup hold music & other settings -->
          <action application="set" data="ignore_early_media=true" />
          <action application="set" data="instant_ringback=true" />
          <action application="export" data="hold_music=/opt/freeswitch-share/moh/0/2_8.wav" />
          <action application="set" data="transfer_ringback=file_string:///opt/freeswitch-share/moh/0/2_8.wav"/>
          <action application="set" data="ringback=/opt/freeswitch-share/moh/0/2_8.wav"/>

          <!-- 3. Call to customer -->
          <action application="set" data="hangup_after_bridge=true"/>

          <action application="bridge" data="[leg_timeout=20]sofia/gateway/gw1/79262410000@wg1|[leg_timeout=20]sofia/gateway/gw1/79262411111@gw1"/>
          <!-- Second try in 5 seconds -->
          <action application="sleep" data="5000"/>
          <action application="bridge" data="[leg_timeout=20]sofia/gateway/gw1/79262410000@wg1|[leg_timeout=20]sofia/gateway/gw1/79262411111@gw1"/>

          <!-- 4. Bridge fail -->
          <action application="playback" data="/opt/freeswitch-share/fs_sounds/ru/connection_not_established.mp3"/>
          <action application="hangup"/>
        </condition>
</extension>

Thank All!

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