[Freeswitch-users] Setting up callbacks
Alex Lake
alex at digitalmail.com
Fri Jun 7 19:07:40 MSD 2013
Well, an example command as issued from within fs_cli is:
originate
{origination_caller_id_name=CallBack,origination_caller_id_number=442074901234}sofia/internal/02070601234@${sip_gw_ip}
442074901234 xml dp0024
Thi s will do a callback to 02070601234 and on answer will place an
outbound call to 442074901234 within the "dp0024" context of the xml
dialplan.
We have our own node.js fs_cli equivalent which gets a web hit and then
puts together such a command string and sends it to freeswitch. There
are a few other tricks that are useful:
1) We have the option for a "press 1 to confirm the outbound call" on
the dialplan to avoid the case where a call back connects your voicemail
to the destination(!)
2) We sometimes want to link the call to a transaction ID from the
client - you can just bung that in the {} after originate and then pick
it up in the event stream or CDRs.
> Alex, how did you do it? am so much intersted in the callbak sinario
> you described, but do not have any idea of how to get it done.
>
>
> On 3 June 2013 08:26, Alex Lake <alex at digitalmail.com
> <mailto:alex at digitalmail.com>> wrote:
>
> As simple as that, eh?! Seems too good to be true! Thanks....
>> You currently (in a previous mail) call a user/ dialstring and
>> when that answers execute a bridge that dials a sofia/ dialstring
>> and joins the 2 calls. The syntax was slightly off, but close.
>>
>> Now think what'd happen if the 2 dialstrings were both sofia/
>> dialstrings to dial 2 PSTN numbers via your SIP provider(s)...
>>
>> You may need to tweak that further if you want either leg to go
>> via the dialplan.
>>
>> -Steve
>>
>>
>> On Friday, May 31, 2013, Alex Lake wrote:
>>
>> ...and for our next trick, how do I do a callback from one
>> PSTN destination to another? i.e. place a call to 07775123456
>> and when that answers, place another one to 02012345678?
>>
>> Cheers,
>> Alex
>>> You almost got it: it's: exten [dialplan] [context]
>>>
>>> So you just needed to do:
>>> originate
>>> {origination_caller_id_name=CallBack,origination_caller_id_number=07775123456}user/0095302
>>> 07775123456 xml dp0095
>>> ... without the &bridge. You /either/ choose an extension or
>>> do &(app).
>>> Usage: originate <call_url> <exten>|&<application_name>(<app_args>)
>>> [<dialplan>] [<context>] [<cid_name>] [<cid_num>] [<timeout_sec>]
>>> To quote from the wiki:
>>>
>>> "Here's an example of originating a call to an extension in
>>> a different context than 'default' (required for the FreePBX
>>> which uses context_1, context_2, etc.):"
>>>
>>> originate sofia/internal/2001 at foo.com 3001 xml context_3
>>> -Avi Marcus
>>> BestFone
>>>
>>>
>>> On Thu, Mar 7, 2013 at 4:02 PM, Alex Lake
>>> <alex at digitalmail.com> wrote:
>>>
>>> Yes, I'd seen that - but I'm currently the wrong side of
>>> the "got it" fence. However, I did this:
>>>
>>> originate
>>> {origination_caller_id_name=CallBack,origination_caller_id_number=07775123456}user/0095302&bridge({origination_caller_id_number=2070602000}sofia/internal/07775123456 at pstngateway.com)
>>>
>>> and it kind of did what I wanted.
>>>
>>> However, what I really want to do is to simulate as
>>> closely as possible what happens when ext 0095302 makes
>>> an outbound call to 07775123456 from a handset -
>>> preferably using the dp0095 context of the xml (?) dialplan.
>>>
>>> So I thought I'd try using the dialplan and context
>>> parameters like this:
>>>
>>> originate
>>> {origination_caller_id_name=CallBack,origination_caller_id_number=07775123456}user/0095302
>>> &bridge(07775123456) xml dp0095
>>>
>>> But I've clearly got the wrong end of the stick!
>>>
>>>> There's a whole bunch of examples here:
>>>> http://wiki.freeswitch.org/wiki/Mod_commands#originate
>>>>
>>>> The first arg rings first, and must be an endpoint,
>>>> e.g. sofia/, user/.
>>>> Once they pick up, the second arg is called.
>>>>
>>>> So originating to a local user or to a remote endpoint
>>>> is nearly the same... especially if you can use the
>>>> lcr/ endpoint.
>>>> Your leg B can be a brige, a conference
>>>> &conference(conf_uuid-TEST_CON), or just hit the dialplan.
>>>>
>>>>
>>>> -Avi Marcus
>>>>
>>>> On Thu, Mar 7, 2013 at 1:00 PM, Alex Lake
>>>> <alex at digitalmail.com> wrote:
>>>>
>>>> I was wondering where's a good place to find some
>>>> examples of how, by
>>>> sending the right commands to the event_socket, I
>>>> could have Freeswitch
>>>> establish callbacks for me.
>>>>
>>>> Essentially there are a couple of different
>>>> termination types - PSTN
>>>> (via a gateway) and internally registered SIP accounts
>>>>
>>>> I would wish to be able to set up A->B (and maybe
>>>> small conferences)
>>>> using these types of destination in any combination.
>>>>
>>>> I've looked through the event_socket pages and the
>>>> "originate" syntax,
>>>> but would like to put together something a little
>>>> more "idiot-friendly"
>>>> so am looking around for precedents/tips...
>>>>
>>>>
>>>>
>>>>
>>>>
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>>
>>
>>
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>
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