V20 Hosted - Caller ID Pass-Through

[DCLLC]

Hi,

We recently switched phone systems to 3CX Enterprise Hosted. A lot of our users have call forwarding setup to go to their cell phones when they aren't in the office and an issue we've noticed is that Caller ID Pass-Through is not working, or it isn't configured by default. Our old provider had this enabled by default. Our SIP Provider is CallCentric and they support this as shown below. How do we enable this in 3CX V20 Hosted?

Customer Advisory: Please note that this feature is ONLY AVAILABLE for customers using a SIP PBX that either supports (or allows the configuring of) the In-Reply-To header (defined by RFC 3261) for incoming calls which are forwarded to an outbound trunk. In these instances Callcentric will "Pass-Through" the CallerID from the original call which was received to the outbound bridged/forwarded call.

Thanks for any help you might be able to provide.

 

[Guillaume Bourgeois]

Hello,
3CX does not support this header.

However, 3CX does support the SIP Diversion header documented in RFC 5806.
For it to work, the DID must be configured to route calls directly to an extension in DND or Away status (without IVR).

Alternatively, try to persuade CallCentric to add CLIP No Screening support.

Another solution is to simply use the 3CX app, but I understand that in some areas, cellular network voice quality is better than cellular network internet, thus providing a poorer experience.

As a last resort, you could use a workaround with a bit of creativity.
For example, ask users to install the 3CX app, set available status ring for 10 seconds, and if there's no answer, forward the call to their mobile number.
This way, if the user is quick enough, they can see the incoming caller ID on the 3CX app, let the call go through, and then have the call forwarded to their mobile number.

Not perfects solutions, but it's better than switching to a provider that supports CLIP No Screening.

Good luck