Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[Neptunika]

Hi. Is it true that the UK FTTC uses Annex A to sync the modem router to the DSLAM and Annex B there after? I'm thinking of getting a TP-Link AC2100 (other name: VR2100). It only mentions Annex for ADSL2 not VDSL2. The router I have at the moment is the cheapest TP-Link one at Argos, £30, and that is VDSL2 and ADSL2 (Annex A) and after a line retrain that I did not ask for, I asked for the QOS to be set properly. I'm getting fast download but 1Mb upload instead of 8Mb sync speed. Could this low upload sync speed be caused because TP-Link is using Annex A? And also is the AC2100 TP-Link fully compatible with Openreach wiring because TP-Link claim Annex A and B is only for ADSL2. I'm on Fibre to the Cabinet VDSL2.

[j0hn]

Technically both.

OpenReach uses Annex A infrastructure (POTS) .
OpenReach uses a VDSL2 Annex B Bandplan.

In Germany for example they use Annex B infrastructure (ISDN) with the exact same Annex B bandplan.

Some modems in the UK report Annex B in the stats but it's the bandplan being reported.

Really you want a modem that states it uses Annex A.

If the DSL port is RJ11 then it's Annex A (UK) and if it's an RJ45 DSL port then it's more often than not Annex B.

Could this low upload sync speed be caused because TP-Link is using Annex A?

Nope.
An Annex B infrastructure modem (ISDN) will not sync on ADSL or VDSL2 on OpenReach.

[SE]

That explains the confusion, thanks for posting that info

 many users on some isp forums have got mixed up then


Could this be a leftover from the uk having us hardware to create our phone services?

I read years ago we needed thier hardware and help to expand and update