call forward toward mobile doesn't show caller number

[Mk25]

hi,

i have forwarded a call to mobile number but it is showing trunk number instead of caller number. is there any way to get the caller number on phone when its forward ?

[Nithin Eluvathingal]

Hope your requirement is to  display the caller ID as the outside persons mobile number   instead of your desk phone number or DID pilot if some one  call your extension and if it gets forwarded.

Almost all ISP will drop  the call if caller-id is  other than your DID range.some  ISP will transalte  the caller-id  to the Pilot number.

[Mk25]

yes our requirement is to  display the caller ID as the outside person's mobile number. is there any other solution that can do this task ?

[Nithin Eluvathingal]

As @Mohammed al Baqari mentioned, due to billing reason ISP will drop the call or translate the caller id to DID pilot number. IF your ISP allow the call, making originator on gateway will send caller-Id as mobile number.

[Mohammed al Baqari]

This won't work for billing purpose. ISPs won't allow it as mentioned
by @Nithin Eluvathingal

[Roger Kallberg]

It might work if the ITSP allows the use of Diversion header. For this you'd usually need to modify the SDP sent via a voice class sip-profiles. There are plenty of good posts on this in the forum.

[TONY SMITH]

You don't say what sort of trunk you have. 

In my experience ISDN will normally drop any calling number which doesn't match the inbound number ranges, normally replacing it with the main billing number.  In the UK BT have a option called "Presentation Number (Type 3,4,5)" which if applied to the trunk allows you to present other numbers, format and TON settings need to be correct.  I give this as an example, your carrier may offer something similar.

If you're using SIP then ITSPs have their own requirements, and I have not found any consistency.  For example four carriers I've used in the UK have four different methods varying from not caring at all (Gamma), requiring tweak to Contact header (Broadsoft), and two others one required PAI set and the other a Redirection header.