https://community.bt.com/t5/BT-Fibre-broadband/VDSL2-Annex-A-or-B-on-BT/m-p/2446942#M362591 <P>Super technical question - does "Annex" apply to VDSL2 (G993.2) or is that just conventional ADSL? I have a new modem (Draytek Vigor) Which is permanently stuck on "Training" and spotted it's Annex A only - yet my current functional modem is configured to Annex B. I'm reading this might just be a red herring but I wanted to be certain.</P><P>If that's not the issue - I recall you need to leave downtime between when swapping modems over so the ATU-C will accept a new device - surely an hour is enough, and should train within 6 hours?</P><P>The ATU-C is showing as a Broadcom 164.161 if that helps.</P><P>TIA, if anyone knows what I'm on about<SPAN>&nbsp;</SPAN></P> Mon, 27 Oct 2025 03:30:46 GMT Phalange 2025-10-27T03:30:46Z https://community.bt.com/t5/BT-Fibre-broadband/VDSL2-Annex-A-or-B-on-BT/m-p/2446942#M362591 <P>Super technical question - does "Annex" apply to VDSL2 (G993.2) or is that just conventional ADSL? I have a new modem (Draytek Vigor) Which is permanently stuck on "Training" and spotted it's Annex A only - yet my current functional modem is configured to Annex B. I'm reading this might just be a red herring but I wanted to be certain.</P><P>If that's not the issue - I recall you need to leave downtime between when swapping modems over so the ATU-C will accept a new device - surely an hour is enough, and should train within 6 hours?</P><P>The ATU-C is showing as a Broadcom 164.161 if that helps.</P><P>TIA, if anyone knows what I'm on about<SPAN>&nbsp;</SPAN></P> Mon, 27 Oct 2025 03:30:46 GMT https://community.bt.com/t5/BT-Fibre-broadband/VDSL2-Annex-A-or-B-on-BT/m-p/2446942#M362591 Phalange 2025-10-27T03:30:46Z https://community.bt.com/t5/BT-Fibre-broadband/VDSL2-Annex-A-or-B-on-BT/m-p/2446945#M362592 <P>Yes, it needs to be G993.2 annex B&nbsp; PTM</P> Mon, 27 Oct 2025 08:11:40 GMT https://community.bt.com/t5/BT-Fibre-broadband/VDSL2-Annex-A-or-B-on-BT/m-p/2446945#M362592 licquorice 2025-10-27T08:11:40Z