[cisco-voip] Possible to force SIP refer transfer from IP phone

[Justin Steinberg]

Couldn't find a way to add the delay on the dialer side, i'm just not
familiar with that system.

I ended up moving the extensions that people dial from Route Patterns
pointing at the dialer to Unity Connection, where I play a short call
handler prompt and then have Unity Connection transfer the call to a new
hidden route pattern.   As long as the IP phone user completes the
supervised transfer during the call handler, the dialer/acd will see the
original PSTN caller.    The call volume of manual transfers from IP phones
to the external dialer/acd is low, so this should work just fine.


On Tue, Aug 12, 2014 at 10:39 PM, Brian Meade <bmeade90 at vt.edu> wrote:

> Justin,
>
> Since these phones do not support blind transfer, it won't be possible to
> do something like that.
>
> Can you add a delay before checking the number so that it checks the
> connected number after the transfer is completed?
>
> Brian
>
>
> On Tue, Aug 12, 2014 at 7:12 PM, Justin Steinberg <jsteinberg at gmail.com>
> wrote:
>
>> I have a unique requirement between a new 10.5 CUCM and a third party
>> dialer/ACD.
>>
>> CUCM is integrated to PSTN via SIP trunk to 2911 PRI gateway.   CUCM is
>> also integrated via SIP trunk to the dialer/ACD via SIP trunk directly
>> between CUCM and the dialer/ACD.
>>
>> CUCM takes inbound call to IP phone. User needs to be able to transfer
>> the external caller to the dialer/ACD.  However we need the initial invite
>> sent to the dialer to have the Calling Party Number set to the external
>> PSTN user, so the dialer can properly do a database lookup of the external
>> party and match the caller ID.
>>
>> When we do this transfer via IP phone, it always starts off as a warm
>> transfer so the dialer/ACD gets the internal IP phone number for the DB
>> lookup.
>>
>> Is there anyway for a IP phone (or jabber) to utilize SIP refer to
>> complete the transfer so the dialer/ACD sees the external party number as
>> caller ID on the transferred leg?
>>
>> As a secondary option, I have considered possibly delaying the actual
>> transfer to the dialer/ACD to give the IP phone user enough time to
>> complete the supervised transfer. But not sure if unity connection call
>> handler is the best way or if there is another way, perhaps in CUCM
>> dialplan.
>>
>> Thanks
>>
>> Justin
>>
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>>
>>
>
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