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VoIP & QoS Analysis

Analyze traffic used by VoIP related services
Voice over IP (VoIP) Analysis is assisted by Scrutinizer by verifying:

	How much voice traffic is historically on the connection
	What devices are involved with the most VoIP traffic
	The possible call volume that should be supported through the connection
	Group ranges of ports into one VoIP application
	All VoIP vendors supported: Asterisk, Cisco, Nortel, Avaya, etc.

How much of the traffic on the connection is VoIP:	Top devices involved with VoIP for the past 24 hrs:
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What hosts is the PBX communicating with the most:	What protocols is the PBX communicating with the most:
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Cisco's VoIP solution uses RTP and RTCP. RTP carries the actual conversation. The RTP protocol uses RTCP (Real Time Control Protocol) to control the delivery of RTP packets. While RTP ports use even numbers, RTCP ports use odd numbers in the range of 16384-32767. In Scrutinizer, visit Settings\Known Applications to define applications using a range of ports.

Guarantee data flow priority
Verify prioritized traffic through Scrutinizer's QoS Tab to ensure that network critical applications are not suffering from unnecessary congestion.

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"We set up the UDP port ranges to monitor for VoIP payload and control characters, based on the data from Avaya, but I couldn't locate any control traffic. That was when I realized that the PBX was using the H.323 protocol instead of the even UDP ports for control. The minute we get a ticket saying a particular site or application is down, Scrutinizer is the first place we go." Jose, American International Group, Inc.

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