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

[Brian Meade]

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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