<p dir="ltr">I have a unique requirement between a new 10.5 CUCM and a third party dialer/ACD.</p>
<p dir="ltr">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.</p>
<p dir="ltr">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.</p>
<p dir="ltr">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.</p>
<p dir="ltr">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? </p>
<p dir="ltr">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. </p>
<p dir="ltr">Thanks</p>
<p dir="ltr">Justin</p>