[cisco-voip] Call Transfer: Inject an arbitrary calling id (ANI) to a JTapi Transfer target

[daniele visaggio]

Thanks, Stephen.

Yes, I'm aware of lua scripting.

Having an sbc in front of the cucm, I already tried to alter the REFER
message in some obvious ways but no luck so far.

I tried also to transform the incoming REFER into a brand new INVITE
(oracle sbc has this feature built-in). Sadly this breaks the routing,
meaning the transfer totally fails.

Before going on with other exotic manipulations, I would like to know in
advance if what I want is even possible...it seems to me cucm is totally
ignoring whatever I put in the REFER.

Best Regards


Il giorno mar 19 nov 2019 alle ore 11:01 Stephen Welsh <
stephen.welsh at unifiedfx.com> ha scritto:

> Hi Daniele,
>
> Not my area, but have you looked at using LUA scripts to
> pass-thru/transform SIP headers on UCM:
>
>
> https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/sip_tn/9_0_1/sip_t_n/5-sip_pass_thru.html
>
> Thanks
>
> Stephen Welsh
>
> On 19 Nov 2019, at 09:38, daniele visaggio <visaggio.daniele at gmail.com>
> wrote:
>
> Good morning.
>
> Diagram:
>
> FINESSE --- UCCE --- CUCM --- SBC --- THIRD PARTY SIP SERVER
>
> *Scenario*:
>
> CUCM receives a call from PSTN. A route pattern sends the call to THIRD
> PARTY SIP SERVER which, in turn, transfers the call back to UCCE IVR SCRIPT
> via SBC/CUCM.
>
> So we have:
>
> *Transferee*: it's the PSTN caller, i.e. the party ending up being
> transferred to the finesse agent
>
> *Transfer Target*: technically it's a CTI route point on CUCM, which
> triggers a UCCE script placing the call on a queue. It is the new party
> being introduced to the Transferee. In the end it represents a finesse
> agent.
>
> *Transferor*: THIRD PARTY SIP SERVER, i.e. the party initiating the
> transfer of the Transferee (PSTN caller) to the Transfer target (finesse
> agent)
>
> In order to transfer the call, THIRD PARTY SIP SERVER sends a SIP REFER
> message to SBC/CUCM.
>
> From a routing perspective, the transfer works fine. The pstn caller can
> be transferred to a finesse agent.
>
> *GOAL*:
>
> we need to alter the calling id seen by UCCE and then by Finesse Agent.
> Actually, the calling id (ANI) seen by UCCE/Finesse is the original PSTN
> phone number.
>
> There are business reasons why we need to do so.
>
> The crucial point is that THIRD PARTY SIP SERVER sends back to cucm a
> custom sip header in the REFER message containing the phone number needed
> to be seen by UCCE/Finesse. This can be different from the original PSTN
> ANI (e.g. the pstn call is anonymous). This new ANI is dynamic and so it's
> not always the same.
>
> I tried with many sip manipulations on the SBC. I placed the new ANI into
> the REFER FROM sip header, in the Remote-Party-id, the PAI header. Nothing
> worked so far.
>
> Is there a way to set a new ani in this call transfer scenario? I need to
> find a way to "convince" cucm to pass the new ANI via Jtapi to
> UCCE/IVR/Finesse. Is this possible?
>
> Thanks,
>
> Daniele
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