In reply to a post by Molehusband:

my present focus is to see how Xilo matches up with Coms like for like.

But if your wiring is faulty, you are just rolling a die.

This die has rolled consistently for a long time. There have never been wild fluctuations. I've tested constantly before and after the Coms switch in January and - apart from when the SNR has been reset to 12db after Coms switched to their system and moving to Xilo - my stats have been very stable. I think this provides a reasonable basis for making a like with like comparison.

Whatever happens, I'll certainly not be running back to Coms (or anyone else) over a decrease of 1MB/s, but if connection speeds between providers using TTB can vary, I think it's useful to know.

FWIW, testing in the past has shown no significant difference when using the master test socket or swapping filters. Bell ring wires are all disconnected.

Looking back, the highest sync speed and lowest SNR I've ever seen here was in May 2013 (ADSL24 TTB MPF).

DownStream: 18837 kbps
UpStream: 1015 kbps
Line att. Down: 19db
Line att. Up: 4 db
SNR Down: 1 db
SNR Up: 7 db

Unsurprisingly, this lasted only a short time and dropped to the following which was typical until the Coms switch.

DownStream: 16176 kbps
UpStream: 1015 kbps
Line att. Down: 19db
Line att. Up: 4db
SNR Down: 6db
SNR Up: 6db

So, with Xilo, it's almost identical to the pre-Coms switch ADSL24.

Watching this with interest as I'm suffering under Coms too. Quick question, does TTB stand for Talk Talk Business? I thought TalkTalk was one of the absolute worst providers to end up on?

Yeah TTB is the business/wholesale arm of TT. TT's poor reputation is purely based on the residential division's phone support. The actual network is very good, it comes down to which provider you go with. If you want the dogs-you-know-what TTB connection then go with AAISP. If you want a decent TTB connection without breaking the bank then go with Xilo, Goscomb or TalkTalk Business direct.

Yes, but see baby_frogmella's post. There doesn't really seem anything to worry about with TalkTalk Business, except the full LLU (MPF) issue if and when you want to migrate out.

I had a similar drop after the move from ADSL24 to Coms. Nothing had changed (my wiring, router, whatever) except moving to Coms.

Since then they switched my SNR from 9db (which I had with ADSL24) to 6db, and I *still* sync at around 1,000Kbps less than when I was with ADSL24!

Looks like a fibre cabinet is *finally* in the process of being installed near my house - as soon as that bad-boy is commissioned I'll be leaving this shower behind!

In reply to a post by Molehusband:

if connection speeds between providers using TTB can vary, I think it's useful to know.

It does sound unlikely though, doesn't it? Or is Coms doing something more underhand, limiting speeds at their end?!

In reply to a post by ColinA3:

In reply to a post by Molehusband:

if connection speeds between providers using TTB can vary, I think it's useful to know.

It does sound unlikely though, doesn't it? Or is Coms doing something more underhand, limiting speeds at their end?!

I find that with TTB SMPF sync speeds vary depending upon when one resyncs the router. Even though one may have a 6dB downstream SNRM it probably depends upon the SNR at sync time.

On a 37db attenuation, 6dB SNRM, interleaved uno/TTB connection my sync speeds can vary anywhere between 12500Kbps and 13000Kbps. On a lower sync speed, usually after a resync at night, the SNRM will usually creep up to 7dB during the day and hence a comparative reduction in speed to when a resync is done during the day when the SNRM holds at 6dB due to a lower SNR at sync time.

It's possible that output power could be controlled by an ISP and hence sync speeds could vary between differing ISP's on a line with the same interleaving depth, SNR and SNRM at sync time?

Edited by 4M2 (Mon 12-May-14 14:09:10)

In reply to a post by 4M2:

I find that with TTB SMPF sync speeds vary depending upon when one resyncs the router. Even though one may have a 6dB downstream SNRM it probably depends upon the SNR at sync time.

On a 37db attenuation, 6dB SNRM, interleaved uno/TTB connection my sync speeds can vary anywhere between 12500Kbps and 13000Kbps. On a lower sync speed, usually after a resync at night, the SNRM will usually creep up to 7dB during the day and hence a comparative reduction in speed to when a resync is done during the day when the SNRM holds at 6dB due to a lower SNR at sync time.

It's possible that output power could be controlled by an ISP and hence sync speeds could vary between differing ISP's on a line with the same interleaving depth, SNR and SNRM at sync time?

My SNR is steady at 5.9dB. Downstream attenuation is 28. And yet I only sync at 13,416Kbps, compares to 14,047Kbps when I was with ADSL24.

Now, that maybe doesn't sound that bad - but consider that originally after the move to Coms it was syncing at only 12,274Kbps down. In order to get it back up to 13,416Kbps my SNR had to be changed from 9dB to 6dB and I removed the ring wire from my master socket. If I'd done both of those while with ADSL24 I'm sure I would have synced at faster than 14,047Kbps.