BT to BT - kept our old number, we were provided with an FTTP connection with VOIP as a free add on. Basic problem seems to be calls made from analogue devices and some mobiles don’t reach the VOIP phone. No problems with outgoing VOIP calls .
OK so BT is the Losing Communications Provider (LCP), the Range Holder (RH) and the Gaining Communications Provider (GCP), they also run BT IPEX (BT DV, BT IP, hosted VoIP CPs and CP interconnect) so its all in their domain to fix.
Unlike davidmbell where VM are the RH so his line is currently now returned and is now set at Unavailable (was no tone). BT DV set up but VM and other networks including BT PSTN is not routing to BT IPEX. In his case BT needs to try and retrieve the porting if they can and get VM to steer the number to BT IPEX. Porting between CPs will always be fraught if the original RH is a third CP. CPs normally only agree to port if the circuit is live. If the port fails due to bad information then it can only be recovered if the RH agrees.
UPDATE: I was mistaken. RH is in fact BT and therefore indicates the in-house number porting within BT is not robust.
Penybanc, I think your issue was simply timing. OR were transferring you to FTTP and had arranged FVA (tele via ONT) and continued as planned. By the time you went live OR had announced no new installs of FVA and BT had announced BT DV as being available nationally and a default on FTTP. My suspicion is that BT DV was set up ok but the FVA task overrode the number port on the PSTN side.
Hence PSTN (analogue) calls and any TDM based interconnects are routing to the FVA. Anything on BT IPEX which includes BT DV, BT IP, hosted VoIP CPs and CP IP interconnect are routing to your Hub.
As BT say BT Digital Voice was trialled and is now apparently nationally available and the new FTTP default then I am assuming they have addressed all the previous technical issues (such as decoding blocks) preventing number porting. There is no reason why BT Customers that are currently with BT, with a BT owned number should not transfer without issue.
Therefore it would appear BT just need to simply reapply your Number Porting from BT PSTN to BT IPEX.
Theoretically all these issues will disappear when we are all on IP and all Interconnect is via IP and the TDM is recovered. But it is a long road and the number of changes are set to increase massively. BT better get their help desks to understand that unsuccessful number porting is a fault, should be registered as such and should be analysed for trends.