The microphone on a Cisco TelePresence System 3000 is switching incorrectly to a camera that does not have an active speaker. What is the first step that an engineer should take to troubleshoot this…

If the microphone were not properly plugged in, it would produce no audio signal and trigger no camera switching at all; an incorrect switch implies the microphone is connected but to the wrong port.

On the CTS 3000, each microphone input receptor on the codec is mapped to a specific camera zone. If the microphone cable is connected to the wrong receptor, the system detects audio from that microphone but switches to the camera associated with the incorrect port, causing the wrong camera to activate regardless of where the active speaker is located.

Microphone calibration adjusts sensitivity and positional accuracy but does not correct a fundamental port-to-camera mapping error.

Plugging all microphones into the primary codec does not resolve incorrect camera activation when the root cause is a microphone connected to the wrong receptor.