We use PBXnSIP with an ITSP trunk, but we want PSTN backup.
We have configured a Mediatrix 1204 using a guide found via google and have 4 analogue lines attached to it, we can receive inbound calls via the mediatrix trunk without a problem, although when someone makes an inbound call on one of the analogue numbers, the mediatrix answers and you can hear 5 seconds of ring tone, then the PBX answers with 1-2 seconds of ring tone and then the phone rings.
Is there a way of shortening the amount of rings by the mediatrix before the PBX picks up and make the pbxnsip ring tone identical to what we have in the UK?