Running The Local Channel Loopback Test; Figure 4-5: Local Video/Audio Loopback Test - PictureTel Concorde 4500 Servicing Manual

Loopback Tests
Network
Codec
Electronics module

Figure 4-5: Local Video/Audio Loopback Test

Running the Local Channel Loopback Test

When you run the local channel loopback test, the audio, video and
data signals are passed through the codec, and up to the network
interface board and then looped back through the system to your
speakers, monitor and data devices. This test veriÞes the operation
of the near-end components and cables, and the codec.
If you receive errors when you run this test, but not when you run
the local audio/video loopback test, you may have a problem with
the VCS and Communications board.
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