originally i had 39db 992.5 annex a from old isp using adsl2+, then got 40db from current supplier then changed router and change linecard now 42db....strange how from 39db now have 42db.

Difficult to say what might have affected attenuation. Could just be the router as different routers can calculate it differently.

It does look like in an ideal world you would get more. Have you been able to run the router from the test socket to rule out any internal cabling issues?

It might just be the cable between you and the exchange is not top notch - and with it running within reasonable parameters BT won't do anything to change it unless you have significant issues. If they found a problem on the line causing your instability then you might get a bonus speed improvement but with the cost of replacing cable BT will only do it as a last resort.

sorry what i meant was if it sync higher i can get what i originally from my old isp i had was around 7mb download speed

Different providers configure their exchange hardware and DLM systems slightly differently

C&W is often not the fastest LLU provider to go with, so asking for 11 Mbps outright is probably not going to help them understand you.

it is a case of now sit and wait for their DLM to be happy with your line, and then gently coax them to do one thing at a time, e.g. sort out the upstream.

Possibly attenuation has increased due to work done on your line and/or you are in a stabilization period. If you were getting 7Mbps throughput previously on ADSL2+ then sync speed would have probably been more than 8000Kbps.

Or your line was performing really well on an ADSL2+ 42db attenuation with a 9dB SNRM to achieve 7Mbps throughput speeds.

Edit: Sorry just noticed that you were on an ADSL2+ 39dB downstream attenuation sometime ago

Edited by 4M2 (Sun 18-Aug-13 16:43:41)

Uptime: 0 days, 0:00:49

DSL Type: G.992.5 annex A

Maximum Bandwidth (Up/Down) [kbps/kbps]: 1,209 / 9,384

Bandwidth (Up/Down) [kbps/kbps]: 1,213 / 7,838

Data Transferred (Sent/Received) [kB/kB]: 0.00 / 0.00

Output Power (Up/Down) [dBm]: 12.0 / 19.0

Line Attenuation (Up/Down) [dB]: 22.5 / 38.5

SN Margin (Up/Down) [dB]: 7.0 / 6.5

my old isp stats

Looks pretty good for the attenuation then. Are you looking to try and squeeze more?

Yep, attenuation has gone from 38.5dB to 42dB so that may account for your reduced sync speed with the same SNRM of 6dB.

to be honest im trying to get what i had with my previous isp i.e 7mb current isp is only offering 5.5-5.7mb which they say its due to different technology. if the only way they want to increase it by tweaking snr then thats not good enough....i still think they are capping people and messing with my line to get attenuation higher.

Edited by deleted (Sun 18-Aug-13 16:56:35)

In reply to a post by candy123:

to be honest im trying to get what i had with my previous isp i.e 7mb current isp is only offering 5.5-5.7mb which they say its due to different technology. if the only way they want to increase it by tweaking snr then thats not good enough....i still think they are capping people and messing with my line to get attenuation higher.

Different technology? Guess there may be some differences between 21CN and LLU though, if relevant in your case. However the older router stats, when you were with a previous ISP, indicate that you were on ADSL2+ then also.

Unlikely that an ISP would mess with your line to get the attenuation higher...