yahoo messenger QoS application type

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I am trying to set a QoS rule for yahoo messenger video/voice call. However I don't know what type of service they are. Are they IGMP, SIP, H323 ,RSTP, ....? Or what port range they use?

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as far i knw almost all messenger services like skype, msn and gmail uses SIP or RTSP in general and with Audio codec as iBLC.