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APC-41 Troubleshooting: No call control on Cisco 79xx with sidecar

Question

I’m not getting call control while using the APC-41 EHS cable with my wireless headset and a Cisco 79xx phone with a side car attached. I have extended the APC-41 with a standard modular connector to reach the AUX port on the Cisco phone. What could the problem be?

Answer

It is recommended to use only Plantronics part number 85638-01 (sold separately) for extending the APC-41 to the AUX port of phone using side cars. If the problems continue to occur please verify the connection to AUX port or it is possible the APC41 cable is not functioning correctly and should be replaced.