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4.6.
VoIP Networks
Total Recall VR uses a software based VoIP packet collector which is capable of
detecting, extracting and then processing SIP, H.323 and RTP packets when connected
to an Ethernet link.
The packet collector does not interact with the packets on the Ethernet link. It does not
add, remove or modify packets. It simply detects and takes a copy of each packet for
further processing.
Each Total Recall VR is equipped with single VoIP packet collector capable of
collecting VoIP packets from a single Ethernet link.
Use the LAN 2 interface for capturing VoIP packets. This leaves the
LAN 1 interface to all other network communication.
Ethernet switch SPAN port (or port mirroring as it is otherwise known) is by far the
cheapest and easiest way to connect a Total Recall VR to a VoIP network for the
purpose of recording. Even if your current Ethernet switch does not support it, myriad
other switches, which cost not more than few hundred dollars, do support it.
Figure 1: SPAN Port for VoIP Call Recording
SPAN ports may be the cheapest and easiest way to start recording VoIP calls and RTP
streams; however in some cases it may be necessary to use other methods in order to
record all VoIP calls and RTP streams on the network. The Total Recall VR
Deployment Guide [3] explains all techniques in detail.
Total Recall VR LinX Edge
Page 13 of 31
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