asterisk users - May 2008 - PBX deployment big problems: Voip traffic analysis

Hi,
hope not to be OT  :)
after more than 3 years of PBX installations we can adfirm Asterisk is 
stable enough to be considered a good product but still we encounter a 
lot of problems when deploying a new PBX. It seems that the biggest 
problems are all networking related: one way voice (also inside a LAN), 
calls drops, etc...
How do you face this kind of problems? Which diagnose tools/methods do 
you use?

Thank you.

Giorgio Incantalupo

hi,
Yes, there are many problem to implement and setup asterisk in a callcenter.
but , all these problem can be remove if you set up your hardware and
your LAN network
verywell.
Generaly, your server Configuration should be greater and your LAN also.
You have to use Proper Codecs for voice. Generaly , g729 is greater.

regards,
Bhrugu Mehta


On 5/16/08, gincantalupo <gincantalupo at fgasoftware.com>
wrote:
> Hi,
>  hope not to be OT  :)
>  after more than 3 years of PBX installations we can adfirm Asterisk is
>  stable enough to be considered a good product but still we encounter a
>  lot of problems when deploying a new PBX. It seems that the biggest
>  problems are all networking related: one way voice (also inside a LAN),
>  calls drops, etc...
>  How do you face this kind of problems? Which diagnose tools/methods do
>  you use?
>
>  Thank you.
>
>  Giorgio Incantalupo
>
>  _______________________________________________
>  -- Bandwidth and Colocation Provided by http://www.api-digital.com --
>
>  asterisk-users mailing list
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>

On Fri, 2008-05-16 at 11:37 +0200, gincantalupo wrote:
> How do you face this kind of problems? Which diagnose tools/methods do 
> you use?
If it were me, I'd start by using tcpdump, Wireshark, and or ngrep to
look at the network traffic and follow the signaling.  Yes, it takes a
little while to wrap your head around SIP and/or IAX2 conversations on
the wire and what they're supposed to look like, but any time you invest
will more than pay for itself later.  

Also, it's always a good idea to have a firm understand of your network.
Are you measuring throughput on your switches?  VoIP traffic tends to
highlight network problems much quicker than typical network traffic,
due to its high sensitivity to latency and jitter.  If your network is
poor, then you're really just implementing VoBN (Voice over Bad
Network).


-- 
Jared Smith
Training Manager
Digium, Inc.

look - you MUST have a minimum of the following
- a clear 24x7 graph of all you network segments show packet loss, 
packet delay for several weeks prior to 1st turn up.
-Unless you have a 100% totally dedicated IP network for you voice, you 
must have Qos
on every piece of hardware in the network, and you must test it to makes 
sure it works.
As you turn up the service, in controlled stages you MUST measure 
network and systems.
and fix any errors or bad trends in the data.
Or you can say the hell with, just turn it up, and see what happens :)

Bhrugu Mehta wrote:
> hi,
> Yes, there are many problem to implement and setup asterisk in a
callcenter.
> but , all these problem can be remove if you set up your hardware and
> your LAN network
> verywell.
> Generaly, your server Configuration should be greater and your LAN also.
> You have to use Proper Codecs for voice. Generaly , g729 is greater.
>
> regards,
> Bhrugu Mehta
>
>
> On 5/16/08, gincantalupo <gincantalupo at fgasoftware.com> wrote:
>   
>> Hi,
>>  hope not to be OT  :)
>>  after more than 3 years of PBX installations we can adfirm Asterisk is
>>  stable enough to be considered a good product but still we encounter a
>>  lot of problems when deploying a new PBX. It seems that the biggest
>>  problems are all networking related: one way voice (also inside a
LAN),
>>  calls drops, etc...
>>  How do you face this kind of problems? Which diagnose tools/methods do
>>  you use?
>>
>>  Thank you.
>>
>>  Giorgio Incantalupo
>>
>>  _______________________________________________
>>  -- Bandwidth and Colocation Provided by http://www.api-digital.com --
>>
>>  asterisk-users mailing list
>>  To UNSUBSCRIBE or update options visit:
>>    http://lists.digium.com/mailman/listinfo/asterisk-users
>>
>>     
>
> _______________________________________________
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>
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>
>