Hi,
I am running Aterisk as a PBX, this is attached to both a BT ISDN30 (provided by a reseller) and SIP trunks with a VoIP provider. I had a block of DDI numbers attached to the ISDN30 which were ported to the VoIP provider on the 19th Jan. All seemed well, I could see calls now coming in on the SIP channels.
Then on closer inspection I noticed a small number of calls, all from local numbers were continuing to come in on the ISDN line. This included calls from an analogue line I have. I reported this to both the VoIP supplier and the ISDN provider. The ISDN supplier said they could do nothing, the numbers were no longer under their control. The VoIP supplier raised this with BT's porting desk who eventually came back saying there was an issue with the ports Virgin Media hadn't properly released the numbers (this was a subsequent port of an NTL range). At this point, earlier in the week I ceased seeing calls coming in on the ISDN. But now calls from my analogue line to any of the DDI numbers give a "The number you have dialed has not been recongised" message. Calling it from a mobile, national numbers and some local numbers is fine.
So as far as I can see there is a call routing issue at the local exchange. Calls from some local numbers are getting through, others are not. The VoIP supplier suggested I log this as a fault with BT on the analogue line. I did this and they sent an engineer out same day. He tested the line, confimed the issue, was very puzzled, had never seen anything like it before and conferred with a couple of colleagues who were equally puzzled. He suggested our PBX was rejecting the inbound calls, but no such call blocking has been set up and this wouldn't explain why the calls were previously coming through the ISDN. I've confirmed with the VoIP provider and they say the problem calls are never reaching their network. The engineer said there was nothing further he could do and nobody to escalate this to.
To me there is clearly a routing issue at the exchange - something hasn't been updated correctly and it needs someone with the right knowhow and access at BT to prod it. But there seems to be no channel by which I can get BT to look at this. Can anybody advise what I can do to get through to the right people?
Thanks,
Tim
