I think there is some type of headset setting even though customer has no headsets.
Phones are KX-T7436 with the jog dial button.

When receptionist at Ext.101 intercom calls either Ext. 104 or Ext. 106, those receiving phones 104, 106 receive a burst tone even though the HFAB button is toggled off. The receptionist phone shows the word TONE on the lower center soft dial button. If I then press center soft dial button Ext. 104 will then start getting intercom ringing.

When I intercom most other extensions e.g. 102, 103, 109 those extensions receive an intercom ring, and the lower right soft button on Ext. 101 shows the word VOICE

I cleared Ext.104 with Int. 790.
I think a few months ago I had same problem on Ext. 109. I think then I did some type of Int 000 that then I used the jog dial button to toggle off some type of behind the scenes headset situation??


Please help.
Thank you

Telesystems technician