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What Protocols does Avaya VOIP use? (For traffic Shaping purposes)

I have a setup running running an Avaya IP Office setup, and 4 remote VOIP [5602SW+ IP] telehones. These work fine, however when teh ADSL line that carries the traffic into the main site get busy we start to get drop out on the audio. I am therefore thinking of defining a traffic Shaping (Packet shaping) Policy for our Gnatbox 250 firewall, in order to ringfence 40-60kbs for VOIP. However beyond (possibly) SIP (UDP 5060/1) I am not sure what protocols this setup might utilise? Although the IP Office system can utilse H323 we dont have a gateway defined and therefore I dont think that we make use of it, I am not sure as to whether this setup uses IMS. I think that the system may also use RTP/RTCP when making calls too but I am not sure about this. The supplier of our telephone exchaneg doesnt seem to have any idea about this, and so far the internet has not been too helpful.

Any thoughts and suggestions would be very helpful.

Thanks
Paul

If anyone can suggest

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denisdsr20

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bmtech

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Hello Denis,
This is excellant. I had figured out some of this yesterday. However the information on how RTP works has enabled me to complete the setup. I have examined the setup in the IP Office system now I know what to look for. It seems that by default the SIP Proxy/RTP range is from 49152 to 53246, this has enabled me to define System Objects in the GB250 to process that port range for the IP address of our PABX, and thereby force that into a packet shaping policy. I have started out with a band width of 80kbs, although we have 4 phones on this circuit they are not usuallly in use concurrently. Some information I found suggests 40kbs is sufficient per conversation, but I will see how it goes.

Best Regards, Paul