I've recently had to replace my long-serving Linksys router as its progressive failure was manifesting itself as increasingly intrusive phone line noise. I'm now getting good service from a modem and separate router (both D-Link, new), but the speeds are somewhat lower than results I was getting a year or two ago. I'm wondering if the failing router has caused the DSLAM to rack the profile up to 15 dB (this assumes that my understanding of these things is correct), but before requesting a reset from my ISP (Talktalk Business), I've been running BQM to check for any other problems.
A typical result is available here
and the latency, at around 50ms, seems high to me. Is this within aceptable limits? For comparison, at a second property about 100m away, the latency is around 30ms, and both should be on the same cabinet.
The line stats are:
Downstream: Sync 3072 Kbps, Attn 47.0 dB, SNR 15.0 dB
Upstream: 704, 25.0, 15.0
Typical TBB speed check results are now consistently around 2.6 - 2.7 Mbps download, 0.6 - 0.68 Mpbs upstream (bits/s); as an example, Iplayer will usually function, but at times is so erratic as to be unusable. I used to get around 4 Mbps download.
(For comparison, the other property, notionally 100 m further from the cabinet, has a downstream sync of 10850 Kbps, attn of 38 dB, at 6 dB SNR.)
I'm sure I should be getting significantly better speeds, but do I just ask my ISP to reduce the SNR, or do you think I have grounds to ask them to get the line investigated, with the usual caveats about charges if 'nothing' is found? I'm concerned that just resetting the SNR will lead to the DSLAM racking it up again.
Further info: The exchange is WWPNZ, Cabinet 1 (Newlyn): straightline distance cab to exc is about 1700m, which at first sight does not fit with the downstream attenuation which is more in line with 3500m. I've been told in the past that the line distance is around 2000m, which seems a little optimistic, although by no means unlikely. However, it is quite possible that the line is actually routed via another cabinet, and I understand that there is some old aluminium cabling to be contended with. (I've used the OR checker which shows cab 1, but I do know that in these parts at least, it is not reliable in that respect.)
Thanks in advance for any comments and assistance you can provide.
Edited by Mygri (Tue 30-Dec-14 17:29:25)