LTRT-31902 AudioCodes Mediant 1000 MSBG with Microsoft Lync and Verizon SIP Trunk Configuration Note

4.1.3

Lync Server 2010 and Verizon SIP Trunk

Wireshark Network Sniffer

Wireshark is a freeware packet sniffer application that allows you to view the traffic that is being passed over the network. Wireshark can be used to analyze any network packets. Wireshark can also be u sed to analyze RTP data streams and extract the audio from the data packets (only for G.711). The audio can be saved as a *.pcm file.



To record traffic that is sent to / from the device:

1.

Install Wireshark on your PC. (You can download it from the following Web site: http://www.wireshark.org/

2.

Connect the PC and the device to the same hub.

3.

If you are using a switch, use a switch with port mirroring for the port to which the

Wireshark is connected.

4.

Start Wireshark.

5.

Select the network interface that is currently being used by the PC - on the toolbar,click Interfaces, and then in the 'Capture Interfaces' dialog box, click the

Options

button corresponding to the network interface:

Figure 4-3: Selecting Interface Currently used by the PC

Configuration Note 92 Document #: LTRT-31902

Configuration Note 4. Troubleshooting

6.

In the 'Capture Options' dialog box, select the desired display options:

Figure 4-4: Configuring Wireshark Display Options

Version 6.2 93 April 2012

7.

Click Start.

Lync Server 2010 and Verizon SIP Trunk

Figure 4-5: Captures Packets

8.

To view VoIP call flows, from the Statistics menu, choose VoIP Calls. You can view the statistics in graph format by clicking Graph.

Figure 4-6: Viewing VoIP Call Flows

Configuration Note 94 Document #: LTRT-31902

Configuration Note

9.

To play G.711 RTP streams, click the Player button.

Figure 4-7: Playing G.711 RTP Streams

4. Troubleshooting

10.

To analyze the RTP data stream and extract the audio (which can be played using programs such as CoolEdit) from the data packets (only for G.711), from the Statistics menu, point to RTP, and then choose Stream Analysis.

Figure 4-8: Analyzing the RTP Data

Version 6.2

a.

Save the audio payload of the RTP stream to a file.

b.

Save the Payload as a *.pcm file.

c.

Select the ‘forward’ option.

95 April 2012