Cisco Headset 561/562 not properly working with Cisco 8811 phones when registered on CME

[gfolens]

I tried to use the Cisco headsets 561/562 on Cisco IP phone type 8811 with the Y-cable. But they fail to work properly. Initial you get dial tone when activating the headset on the phone or audio when answering a call ut after about 10 seconds audio drops.

Seems you need to enable "Wireless HeadsetHookswitchControl" field but I cannot find this on the phone user/admin settings neither on the CME parameters...

Any hints to mae this working?

The latest phone firmware is being used: cmterm-88xx.12-5-1SR1-4.

[Jonathan Schulenberg]

There is a known defect with EHS in that phone firmware version.
https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvo24499/

[gfolens · Accepted solution]

Cisco Tac provided the solution:

You need to add "service phone ehookEnable 1" under the "telephony-service" to enable headsets on the CME reigstered phones.