Tracking drop calls

[zulma]

Hello all,

Mitel 3300 V 9.0.0.41
Our internet vendor had problems yesterday, therefore we had miscelaneous calls dropped. Boss wants me to track them. Is there a maintenance command that will show me what calls were dropped and times? I run traffic status, congestion commands but not enough info, especially since this happened yesterday. any other suggestions? please. Thanks you.


TRAFFIC CONGESTION REPORT FROM 09 : 02 TO 12 : 30
No faults to report

TRAFFIC STATUS
There are no active sessions programmed.

 

[slapin]

Look in software logs. Quality of service stats will give some information as well. Are you using SIP trunking over Internet. I would recommend to stay away of this option as far as possible for enterprise applications. Internet provides no QoS, no SLA and you cannot penalise your provider for any sort of outages (see your contract). Besides that you can do about nothing even if you would be able to track dropped calls down. You get what you've paid for. Correct me if I'm wrong and made unreasonable assumption.

 

[zulma]

Thank you for your slapin. There were some errors in software log, but nothing that will point to specific extension. We use SIP trunking only to do tranfer to vm [exchange]. We have a full T1 for the phones

The vendor had a major problem and affected many customers. And you are right, there was nothing, I could off done but boss said 'i need a report on drop calls' so that is what i was looking to get.

Thanks again and happy holidays.

Zulma

 

[IrwinMFletcher]

The problem with dropped calls is that the user on your end will eventually just hang up. To the pbx, it 'sees' nothing wrong, to it, your user just hung up. The pbx would then send a Disconnect to the CO, but if it never replies, then so be it, not all do even when they are working.

The only thing I can think of to do in the future is to enable SMDR and if you detect a true failure you should see a period where all of your calls end at roughly the same time.

 

[zulma]

Great advice for the future! I will enable SMDR.

Many thanks

 

[slapin]

Ok, with T1 (PRI) there should be no major issues.
If it was a problem somwhere in the telco network, then you will find exactly nothing. If your link went down, you should be able to see L2/L3 link up/down messages.

It is a network, you cannot see what's going on inside. In case of failure of established voice circuit on one of the switches at least one layer further then your access link, the network will generate disconnect message and terminate this call. There is a chance that just few calls will be affected which by chance were crossing the same switch. As it was said above, the pbx will not report anything since it's a valid disconnect message. If your boss wants to get compensation from telco, you will have to provide full log of the problem including diagnostic codes from Q.931 disconnect messages different then "normal-call-clearing".