topic Full Fibre install and VOIP... in Full Fibre

Full Fibre install and VOIP...

jimchjones — Tue, 11 Aug 2026 18:44:00 GMT

It looks as if my favoured option for copper switch off is to stay with Plusnet so I can keep my static Ip address and use a third party VOIP supplier to take over the landline mumber. OK so far, but how does installation timing work? Can't migrate landline to VOIP over the current desperately slow copper, but equally hard to get twoseparte orgs to cooperate too precisely. In an ideal world it would be good to have the copper left live for a week or so to permit a structured migration, but I bet the damn rules prevent that...

Re: Full Fibre install and VOIP...

jab1 — Tue, 11 Aug 2026 18:49:46 GMT

@jimchjones Basically, although I'm sure you will get a more comprehensive reply from someone else, you get the FTTP installation done, and then you have 30 days to transfer the phone number to a supplier of your choice.

You cannot have two Openreach services at the same address.

Re: Full Fibre install and VOIP...

jimchjones — Tue, 11 Aug 2026 19:05:45 GMT

Thanks, yes, I've found the thirty days, but if on day 0 the OR engineer installs the fibre and pulls the copper it would seem that I am stuck without an operational land line until the VOIP goes live.

Re: Full Fibre install and VOIP...

jab1 — Tue, 11 Aug 2026 19:10:02 GMT

You are, but the VoIP transfer is fairly rapid. https://www.aa.net.uk/ has a comprehensive useful guide.

Re: Full Fibre install and VOIP...

bmc — Tue, 11 Aug 2026 20:09:34 GMT

@jimchjones

As you can't "port" the number until after Full Fibre is installed you will have a few days downtime on the phone. To do so before hand risks your PN account being closed and the FF install cancelled.

One option, especially with A&A is to set up an account with them and take a generic number to start with. This gives you the opportunity to ensure your phones work with VOIP and covers you on the downtime on your main number.

Once your number has ported successfully you cancel the generic number. Costs a few quid extra to go this way but it keeps you with a phone service.

Note that VOIP doesn't work during power cuts and that house extensions don't work without some extra effort.

Brian

Re: Full Fibre install and VOIP...

PhilipHeyes — Wed, 12 Aug 2026 06:12:36 GMT

We also started the VoIP account with a new number months before the land line number was ported in from BT
and had our VoIP kit installed and working.

Now we have the new Sipgate allocated number plus the old BT land line number on the same account
i.e. dial either number and the calls are routed to the same VoIP phone.

Out bound calls can display either number for the Caller Id,
but we have configured the old be land line number to be displayed as that is what banks / GPs etc expect to see.

Re: Full Fibre install and VOIP...

MisterW — Wed, 12 Aug 2026 06:14:36 GMT

@jimchjones

but if on day 0 the OR engineer installs the fibre and pulls the copper it would seem that I am stuck without an operational land line until the VOIP goes live.

It doesnt matter whether the copper is still there or not, the phone service will be ceased as soon as the FTTP goes live.

As @bmc says , you will have a gap of a few days with no phone service