Two PBXs - conference calling not working from one to the other - regular extension to extension calls work

[wizworks (John Rogers)]

I have two PBX in different locations:

1. US
2. Paris

There are conferences hosted on the US server and there is an IAX trunk between both servers. Extension to extension calls flow across fine and with caller ID etc. No problems there.

The problem is when user on Paris PBX tries to call a conference (302) on US server. They dial 302 and hear “Your call cannot be completed as dialed”

I have the right match in the outbound route and I can see the call progressing across the trunk and reaches the US server but yet cannot complete? what gives?

Here’s the CLI debug output on the US server:
VERSION : 2
CALLED NUMBER : 302
CODEC_PREFS : (ulaw|alaw|gsm)
CALLING NUMBER : 24001
CALLING PRESNTN : 0
CALLING TYPEOFN : 0
CALLING TRANSIT : 0
CALLING NAME : K1WIZ John
LANGUAGE : en
FORMAT : 4
FORMAT2 : ulaw
CAPABILITY : 14
CAPABILITY2 : Unknown
ADSICPE : 2
DATE TIME : 2018-09-14 22:27:20
CALLTOKEN : 51 bytes

Please help - what can I do?

[Stewart1 (Stewart)]

The incoming IAX trunk context at the US end should be from-internal (or something else that will accept the conference feature code).

If you already have that or it doesn’t help, post the US log for a failed attempt.