Hi,

  To make it easier, let's call the main extension A, and the secondary extension B. When someone calls B and A is busy, you want the "call-waiting" signal to be heard.

Note: I've taken snippets from my dial plan and changed them in order to readable without my context; hence, they might not work on first attempt.

First, I've added a new parameter to the B's directory entry called "chk_ring" which has the value of B.

First, you have to tell mod_limit to track calls to/from the main extension (I am doing that for all extensions) with the following commands before calling the bridge application:
      
     <action application="limit" data="hash max_calls ${dest} -1 HANGUP_USER_BUSY" />
This causes mod_limit to track the calls to that extension.

BTW, it is adviseable to add also the following setting in order to count correctly when doing call transfer:
<action application="set" data="limit_ignore_transfer=false" />

Next, during a new call process you have to check the limit of A extension with the following:

<extension name="Intercom" continue="true">
    <condition break = "never" >
        <action application="set" data="chk_number=${user_data(${destination_number}@${domain_name} var chk_ring)}" inline="true"/>
                <action application="set" data="OrigDest=${destination_number}"  --- Save the original number
                <action application="limit" data="hash max_calls ${chk_ring} 1 ChangeRingBack" />
    </condition>
</extension>

And then add a ChangeRingBack extension:
<extension name="ChangeRingBack" continue="true">
  <condition field="destination_number" expression="^limit_exceeded$">
     <action application="set" data="ringback=${callwait-ring}" />
  --- Do the bridge.
    </condition>
</extension>


2016-12-22 7:54 GMT+02:00 Bipin Patel <bipin@xbipin.com>:
hi,

this is exactly what im trying to achieve, i want to be able to check if called party is busy on another call then generate a different ringback than the normal one i use if not busy. Can u kindly provide a dialplan example coz im getting confused on how to track if the ext is busy as well as increment and decrement the limit value?
Regards,
Bipin


-------- Original Message --------
Subject: Re: [Freeswitch-users] different ringtone when called party is already busy on another call
 From: Yehavi Bourvine <yehavi.bourvine@gmail.com>
To: FreeSWITCH Users Help <freeswitch-users@lists.freeswitch.org>
Date: 12/22/2016, 8:59:35 AM
What I am doing in a similar case is:

- I am using the mod_limit to know which extension is in a call and which is free.
- If a call is made to a busy extension (which has the call waiting feature) then I play a different ring-back tone with the command:
             <action application="set" data="ringback=${callwait-ring}" />
- In your case, the busy extension is different than the one being called; thus, you have to add to the extension variables/parameters a new parameter which specifies the other extension number; then you have to call mod_limit for both extensions, and play the call-wait ringback if one of them is busy.

         Regards, __Yehavi:

2016-12-21 13:59 GMT+02:00 Bipin Patel <bipin@xbipin.com>:
hi,

its a multi line phone so i guess B is accepting the call like a normal call which it should with call waiting enabled on it, if it sent busy then A would simply hear busy tone which i dont want, i want to make A hear a different ringtone while call is waiting so A can know using the tone that B is on another call and might or might not answer
Regards,
Bipin


-------- Original Message --------
Subject: Re: [Freeswitch-users] different ringtone when called party is already busy on another call
From: Lợi Đặng <loi.dangthanh@gmail.com>
To: FreeSWITCH Users Help <freeswitch-users@lists.freeswitch.org>
Date: 12/21/2016, 2:22:11 PM
guess It is the B's function, B is able to put the call in waiting instead of respond 486 to FS, when B is already a call with another party.
in this case, I'm afraid FS will have no idea about what is happening in B.
what branch B is? did you try B's role with another phone?

rgds,

Loi Dang Thanh
Phone : +84.1224.735.448
Email : loi.dangthanh@gmail.com

On Wed, Dec 21, 2016 at 3:40 PM, Bipin Patel <bipin@xbipin.com> wrote:
hi,

i have been using FS in product on many raspberry pi's and other machines in PBX environment and everything works well except im stuck with a requirement which i cant seem to be able to get over.

party A calls party B but party B is already in call with party C, so party A gets normal ringtone and party B gets call waiting beeps, how do we detect in FS that party B is already busy on another call and generate a different ringtone for party A which he hears so indirectly party A knows that party B is already on another call?


--
Regards,
Bipin



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