Kitz Forum

Broadband Related => Broadband Hardware => Topic started by: IBeAdam on February 16, 2020, 10:22:46 AM

Title: Zyxel 1312-B10A always re-sync's at approx half speed
Post by: IBeAdam on February 16, 2020, 10:22:46 AM
VMG1312-B10A running firmware V1.00(AAJZ.17)C0.

Whenever the internet goes down (daily) the Zyxel always re-connects at around half speed, until I reboot the device.

For example:

This is typical and seems to happen every time.

If I try an "adsl connection --up" it re-sync's at the same (low) speed. It has to be a reboot.

Previously, with the BT HG612 or Billion NL8800 this does not happen. I still get the drops (which is an issue I'm progressing via my ISP) but on re-sync I get my usual speed.

Has anyone had this problem, or can anyone give any advice on how to fix it?
Title: Re: Zyxel 1312-B10A always re-sync's at approx half speed
Post by: ejs on February 16, 2020, 10:41:52 AM
I think it's some bug with the modem driver and vectoring. I think someone made some custom firmware for certain Zyxel models containing a updated modem driver which was supposed to fix it. The much simpler solution would be to use one of the other devices which, as you've already discovered, don't suffer from the same problem.
Title: Re: Zyxel 1312-B10A always re-sync's at approx half speed
Post by: IBeAdam on February 16, 2020, 02:56:19 PM
Quote from: ejs on February 16, 2020, 10:41:52 AM
I think it's some bug with the modem driver and vectoring. I think someone made some custom firmware for certain Zyxel models containing a updated modem driver which was supposed to fix it. The much simpler solution would be to use one of the other devices which, as you've already discovered, don't suffer from the same problem.
Ah, that's very useful info thanks. I've seen customer firmware, so will give that a go.

I could switch back to one of the others, but the Zyxel gets the fastest sync speed - and I can use every mbps I get!
Title: Re: Zyxel 1312-B10A always re-sync's at approx half speed
Post by: johnson on February 16, 2020, 07:03:04 PM
Do let us know if the x6 firmware fixes your issue, it certainly did with my vectored line.

Others with vectoring and slightly different issues have had success with even older DSL code. For example the Billion does not exhibit the half speed issue as it uses a much older dsl driver and adsl_phy.bin.
Title: Re: Zyxel 1312-B10A always re-sync's at approx half speed
Post by: IBeAdam on February 18, 2020, 07:55:11 AM
Line went down overnight (see, I said it wouldn't be long!) and it came back up at full speed for the first time. Brilliant.
Title: Re: Zyxel 1312-B10A always re-sync's at approx half speed
Post by: johnson on February 18, 2020, 08:15:05 AM
Excellent news!