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This is the support site for Andrews & Arnold Ltd, a UK Internet provider. Information on these pages is generally for our customers but may be useful to others, enjoy!
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The FireBrick 6000 routers we use provide us with Continuous Quality Monitoring of every broadband circuit. This allows us to track the quality of each and every connection in great detail. The router itself produces the graphs in real time, and can also provide csv files with accurate data for each graph.
Customers and
{{CPbox|#Click on the line you want to view
==What information is on the graph?==
[[File:Cqm-screen-shot-notes.png|
Each column (pixel) represents 100 seconds of samples. The hour of day is shown at the bottom, and the day and date shown next to midnight in the graph. There is additional text superimposed on the graph such as a circuit ID.
===Pins===
Staff are able to add '
=ICMP Graphs=
Optionally,
[[File:Cqm-icmp.png|none|frame|An graph created from ICMP Pings to a WAN address]]
Customers
Sometimes a normal CQM graph may have a salmon background - this would usually be when the line is logged in to our test LNS.
[[File:CQM1.png|none|frame|Lots of upload at the end of the day]]
(Not an ADSL
Here is another, an FTTC line filling the up link whilst doing a backup (
[[File:CQM-FTTC-upload.png|none|frame|Lots of upload in the morning - a backup without any traffic shaping on the client end]]
This line is doing a large backup from just before 6am. The dark red horizontal line shows the traffic, during this time there is lots of packet loss (red) and the light blue at the bottom is showing high latency. So, whilst the backup is happening the line has about 50% packet loss and around
===Redcare===
[[File:Cqm-dropping2.png]]
This line does have a fault. It is dropping sync throughout the day. In this type of case, go through the usual checks, and AAISP will report a fault, which will probably need a BT SFI
===Only Dropping during the day===
[[File:CQM4.png]]
(Probably not an ADSL Fault.) If a line is dropping during the day, and maybe just Monday to Friday, then it's probably not going to be an upstream problem. This could be caused by interference
===Interleaving being applied===
For more info see: [[Interleaving]]
===Heavy
Also see [[Packet Loss]]
[[File:CQM-heavyloss.png|none|frame|This is showing more than 50% packet loss with no usage. A problem!]]
[[File:Cqm-packetloss-contactfault.png|none|frame|This line has loss due to a
[[File:Cqm-VPcongestionOrfault.png|none|frame|Packet loss when a downloading but not filling the line]]
This is a rather strange one. There is
===Phone line half connected - DIS in one leg===
[[File:CQM-FTTC-DIS-in-one-leg.png|none|frame|FTTC running on just a single leg/wire]]
Here we have a perfectly good FTTC, running at 80M. However, in the evening the line goes rather crazy! Here is what happened:
*18:20
**The line dropped a few times and reconnected, but the sync speed dropped to from
*The line continued working for a short while, up until:
*19:20 where a backup job was started which started uploading data
**As the sync speed was so low, the backup filled the link and high latency (blue) ensued.
**At
*Looking at the times on the graph gave a clue to the end user what had happened. They had accidentally disconnected one of the wires of the phone line and surprisingly the FTTC was actually still in sync, logged in and passing traffic - just at low speeds.
*20:00 The wiring was repaired and the FTTC came back in to sync at the usual high rates.
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