VoIP Testing with IxChariot
Short summary:
Create additional 20 IPv4 VoIP pairs with QoS support. Create appropriate number of VoIP pairs to theoretically fill WAN link to full capacity. ...
Long summary:
1. VoIP Testing with IxChariot 1.2. Key Facts The default values in a IxChariot VoIP test emulate a unidirectional voice stream. If you are emulating a full-duplex bi-directionalvoice stream like G711, you need to setup two pairs using the same codec for each voice channel that you are emulating. The number of pairs that you can run depends on the platform you are using. Enabling silence suppression changes your voice activity rate, thus leading to lower performance measurements.
2. Determine Voice Quality Deterioration with Increasing Application Traffic Load 2.1. Objective and Setup The move to packetized voice (VoIP) is driven by the desire to use the existing data network for both application traffic and voice.This means that effective VoIP performance testing cannot be done in isolation since few networks will exclusively run VoIP.Figure 1 shows the performance of a pure VoIP network. Figure 1 2 Copyright © Ixia, 2005 VoIP Testing with IxChariot Figure 2 shows the impact general application traffic will have on the same VoIP network. Figure 2 2.2. Test methodology Setup series of VoIP pairs (e.g. 50 pairs). Run test and check VoIP metrics such as Jitter. Add mixture of high performance test script to emulate other applications. Run test and determine new VoIP metrics. VoIP Testing with IxChariot Copyright © Ixia, 2005 3
3. Measure Impact of Voice Traffic on Constant Application Traffic Load 3.1. Objective and Setup As a reverse option to test 1, this test assumes an existing data network to which VoIP is now being added. The key question is thenumber of channels (pairs) that can be added while maintaining adequate response times and throughput for the existing businessapplications. At the same time, the MOS estimates for the VoIP pairs should also demonstrate the quality of the calls. Figure 3 ...
Source: www.ixiacom.com
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