Forwarding external call to mobile number gives Unknown caller ID

[Realmlist]

Hello,

Whenever I try to forward an external number (for ex. my work smartphone) to my private mobile number it appears on my private mobile phone as 'Unknown' called ID.
When I ring my mobile number directly from my work phone (3CX client and/or IP Phone) the caller ID appears correctly.

Is there a way to have the caller ID of the original caller instead of Unknown?

I have already tried changing From : User Part to "OriginalCallerID", but it doesn't seem to work.
My VoIP provider is WeePee. (Supposedly (see: read on other threads/websites) they support this)

Kind regards.

 

[leejor]

Every provider can be different, in what they want to see in the fields. Just keep track of what was originally there, if you begin changing more than one, or you may end up causing other troubles.

https://www.3cx.com/community/threads/caller-id-on-call-forwarding.21004/

 

[YiannisH_3CX]

Hello @Realmlist

Please note that Weepee does not do true clip no screening (sending the originator caller ID) as they require you to register the number with them first before you can use it. So if you have a set of numbers that are often forwarded you need to contact them and declare these numbers to be able to present them as Caller ID.