> 3. How is voice services supported.

VOIP ? Can't be beyond BT to have a solution for that, it's been around for many years with ISDN30 over fibre.

Which would require BT to deploy battery backup in homes like they do for Fibre Voice Access in FTTP areas to satisfy the USO on emergency calls etc

The 21CN voice roll-out has largely stalled, issues with call reliability I suspect.

directly no.

indirectly ofcom research shows that the power cutback applied to vdsl lines favours adsl lines in that vdsl lines cause less crosstalk than adsl lines, so as adsl custoemrs move to vdsl those left on adsl see improvements due to reduced crosstalk.

In reply to a post by TMCR:

> 3. How is voice services supported.

VOIP ? Can't be beyond BT to have a solution for that, it's been around for many years with ISDN30 over fibre.

ISDN30 is not VOIP, although TalkTalk do a thing called IP-ISDN30 which mimics ISDN30 using IP over EFM.

In reply to a post by yarwell:

In reply to a post by TMCR:

> 3. How is voice services supported.

VOIP ? Can't be beyond BT to have a solution for that, it's been around for many years with ISDN30 over fibre.

ISDN30 is not VOIP, although TalkTalk do a thing called IP-ISDN30 which mimics ISDN30 using IP over EFM.

I meant that using fibre for voice service had been around a long time, not that ISDN30 was VOIP...