Route inbouncd calls based on prefix out E1 Pri

Hi

We have a Trixbox Pro EE server with a Dual E1 Sangoma 102 card. Port 1 comes from the telco, port 2 is connected to the existing Alcatel PBX. Inbound calls from the Alcatel need to be re-routed out to the telko if the dialed prefix is 085. How can this be achieved.

At the moment all inbound calls go to "incoming" and are routed via the inbound call menu. There is no way to add an incomplete number or prefix in the "numbers" section, so we cant route all 085 calls via "route inbound calls by number dialed"

The other option is to create a dialplan based on "085", can you route incoming calls to the dialplan and not inbound call menu?

Our TB Pro is basically a middle man between telko and legacy PBX, this must have been done before.