Solved P-Assert in INVITE Message

[Shadragon]

I received this email from our rep with the ISP to solve our caller ID issues.

"Can you include the “P-Assert” parameter in the INVITE message. The P-Assert parameter holds the number you want to display at the far end and grants the permission to display it."

I looked and the only 3CX forum post I could find is from 2006, saying: "At this point in time 3CX does not make use of P-Asserted fields in the INVITES we build."

Source: https://www.3cx.com/community/threads/custom-fields-in-invite-string.9710/

I'm hoping that has changed. Where (and how) do I amend the INVITE message? Thanks,

 

[leejor]

The P-Assert parameter holds the number you want to display at the far end and grants the permission to display it."

Well, actually, it sends the calling party number, but withholds permission to display it.
Equivalent to using *67 on a PSTN phone line, in North America.

 

[YiannisH_3CX]

Hello @Shadragon

You can include the P-Asserted-Identity parameter in the Invite message to the provider. Navigate to your trunk settings / Outbound parameters and configure the P-Asserted-Identity fields. Here's an example on how to configure it but depending on what your provider supports this may require some changes.

 

[Shadragon]

Hmmm, my P-Assert is already set to those exact settings.

Will have to follow up with one of their engineers. Thanks.

 

[YiannisH_3CX]

Let us know if further assistance is required.

 

[Shadragon]

OK, I thought I'd post my findings. We had the PBX set up correctly, but our phone numbers under Extension > General > Outbound Caller ID needs to be in the format of:

+1441XXXYYYY No spaces, hyphens, brackets or dashes and the + symbol is mandatory. Hope that info saves someone else a headache.

 

[YiannisH_3CX]

Glad to see the issue has been resolved and thank you for updating the thread with your solution.