We have a number of DID's associated with a PRI at one of our sites. These are assigned to internal DNs with translation patterns. Calls coming into these DID's work fine.
I have one customer at a second office who tried to forward calls to their DID to a cell number. The calls appear to foward - the target phone rings, however when the call is answered neither party have any audio. The calling party also does not hear any ringing.
The forwarded calls are coming in from the PRI but going out through a local FXO. If I force the forwarded calls to go back out the PRI with a route pattern, both caller and called party can hear each other and the forwarding is successful.
If I revert back to the calls going out via FXO, there is no audio.
Normal dialed calls out these FXO ports work without issue, and internal forwarded calls are also fine.
PRI @ Site A ---> WAN ---> 3825 @ Site B ---> Call Forwarded ---> FXO on 3825 @ Site B ---> Call goes through but no audio.
PRI @ Site A ---> WAN ---> 3825 @ Site B ---> Call Forwarded ---> WAN ---> PRI @ Site A ---> Call goes through and audio is fine.
The voice gateways for both the PRI ard the FXO are both 3825's.