Category:Slow ADSL: Difference between revisions

A slow connection could be caused by a number of things. We'll go through some quick checks first and then move on to some more detailed investigations. (Do feel free to call support for help!)

#Take a look at our [http://clueless.aa.net.uk/congestion.cgi Congestion Report] - see if it's a wider issue that AAISP are already aware of

#Go through the [[ADSL Checks]]

#Check the CQM Graphs, to see if it is slow due to lots of traffic

#If it is traffic related, then you can use the [[Traffic_Capture]] feature on the Control Pages to see what the traffic is

#Contact Support

==Testing the Speed of the Line==

There are various speed test sites on the internet that can be used to see what speed your line provides. We'd suggest using a few different ones so as to be sure a slow report isn't due to a slow speed test server.

There are official speed tesr sites provided by BT and TalkTalk, these have the advantage of being logged at the supplier side which will help in fault reporting.

We also run a speed test site.

*[http://speedtest2.aa.net.uk] AAISP Speed tester

*[http://www.supportal-test.co.uk/] TalkTalk Speed tester

*[http://speedtest.btwholesale.com/] BT Wholesales Speed tester

==What speed should you have?==

The availability checker on the bottom left of [http://aa.net.uk] will give an estimate as to what your line should be capable of.

==Finding your current Sync rate==

You can check the linerate of your line - this is the speed of the line as reported to us by the back-haul provider.

Example:

[[File:Linerate-slow.png|none|frame|This one has a rate of 228k - something is wrong!]]

=Causes of slow lines=

There can be many reasons why a line is slow, maybe the scenarios below can help:

==Lots of other traffic on the line==

Here is an example of a CQM Graph with lots of upload traffic,

[[File:CQM1.png|none|frame|Lots of upload at the end of the day]]

The example above show a line with occasional short uploads causing spikes in peak latency, and then a sustained upload starting at around 6pm and causing high latency (queue in the router). At 8pm there was more upload filling the link causing higher latency still and some loss (normal when the link is full). This is normal.It may cause the line to be slow. If you don't know what the traffic is, then you can do a [[Traffic Capture]] or ask Support to Help.

==Sync rate has been capped or lowered==

You can check the linerate of your line - this is the speed of the line as reported to us by the back-haul provider.

Examples:

[[File:Linerate.png|none|frame|Line rate as shown on the control pages, ie 39.8M - Good!]]

[[File:Linerate-slow.png|none|frame|This one has a rate of 228k - something is wrong!]]

#Log in to the Control Pages

#The line rate is usually shown on the front page, as per the image above

==Packet loss on the line==