CallBack in CCM 4.0.2 not working

[godfreyma]

I've configured the Callback feature on the 7960G in CCM 4.02. I have following the instruction of the doc but when I press the callback softkey, "Callback is not active" is displayed on the screen.

What's other configuration or any checking I have to do?

[Steven Smith]

http://www.cisco.com/en/US/products/sw/voicesw/ps556/products_administration_guide_chapter09186a00801ed111.html#19815

This is the checklist for configuration.

Also, there is something important to note at the top of the Doc.

The Cisco Call Back feature allows you to receive call back notification on your Cisco IP Phone when a called party line becomes available. To receive call back notification, a user presses the CallBack softkey while receiving a busy or ringback tone. You can activate call back notification on a line on a Cisco IP Phone within the same Cisco CallManager cluster as your phone. You cannot activate call back notification if the called party has forwarded all calls to another extension.

This explains when you can actually press the key. Finally, make sure Cisco Extended Functions is running on the servers.