Trunk provider requires Diversion Header

[pehavel]

Hello,

I have a problem displaying the correct original caller's number for an outgoing call from 3CX, when call is redirected.
I have consulted this problem with the trunk provider: They need in SIP packet header Diversion field.

How can I set 3CX system to sent this Diversion Header for outgoing redirected call? I have not found this option anywhere.

Thank for help.

 

[StefanW]

there is a small issue with this header, even widely used it is "Historic"

https://tools.ietf.org/html/rfc5806

and has been replaced with the history header... Best to switch to a supported provider which does not need this.

 

[pehavel]

When Diversion Header is history (old), what is now use for redirected signaling in SIP?

 

[StefanW]

As stated the "history header". But in general, most providers only require that you send a number you own (as authorization) and the number you like to show (display number).