[Serusers] SER RTP QoS Monitoring

[Aisling O'Driscoll]

Hi,

I want to be able to extract QoS parameters such as jitter, delay and
packet loss from VoIP calls made using my SER(both peer to peer for
my public clients and also for clients where the voice will be routed
with mediaproxy). I would like to develop something as opposed to
purchasing a software package. 

>From searching the Internet the last few days I have seen that the
following options seem to be available:

1) RTCP
RTCP stream will contain this information. The problem is that
sniffers cannot clearly distinguish RTCP packets from other UDP
packets unless something like an IP address or specific UDP port is
supplied. I had considered using TCPDUMP but then where do I position
this in the network when voice is going peer to peer between client
and I'm not sure how this can work to monitor all calls when I might
not be aware of the end user IP addresses.

2) SIP INFO extension
This also seem to be an option but most off the shelf phones don't
seem to support this and this would required modification of a SIP ua.

3) SNMP
I thought maybe SNMP might be an option but the SER snmp module no
longer exists...

Does anyone have any comments on the above? Are the statements that I
made correct or can anyone think of other ways to monitor the voice
QoS? I am trying to understand how commercial applications have
accomplished this.

Many thanks in advance for advice.
Aisling.

>---- Original Message ----
>From: clona at cyberhouse.no
>To: ashling.odriscoll at cit.ie
>Subject: Re: [Serusers] Status of SER SNMP module
>Date: Sun, 29 Jan 2006 20:30:02 +0100
>
>>
>>Hi Aisling,
>>
>>The SNMP module is dead as a killed turtle :( 
>>
>>-Atle
>>* Aisling O'Driscoll <ashling.odriscoll at cit.ie> [060129 20:26]:
>>> Hello,
>>> 
>>> I'm just wondering what the current status of the SER SNMP module
>is?
>>> Is it currently supported and is there somewhere I can find
>>> documentation on it?
>>> 
>>> Many thanks,
>>> Aisling.
>>> 
>>> 
>>> 
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The above electronic mail transmission is confidential and intended only for the person to whom it is addressed. Its contents may be protected by legal and/or professional privilege. Should it be received by you in error please contact the sender at the above quoted email address. Any unauthorised form of reproduction of this message is strictly prohibited. The Institute does not guarantee the security of any information electronically transmitted and is not liable if the information contained in this communication is not a proper and complete record of the message as transmitted by the sender nor for any delay in its receipt.