Mitel SX-200 Documentation page 255

SECTION MITL9105/9110-096-105-NA
NO DIAL TONE
Page 200
Description
Assignment of this feature to a Dial-In tie trunk suppresses dial tone
on an incoming trunk call. If this feature is assigned to an extension,
the extension will not receive dial tone when going off-hook
Conditions
None
Programming
The COS assigned to a tie trunk or an extension must contain
l
Option Number 61 (No Dial Tone).
Operation
None