Mitel SX-200 Practices page 271

Features
Dial Tone Disable
Description
Conditions
Programming Enable COS Option 701 (No Dial Tone) for the device.
Operation
None.
Assignment of this feature to a dial-in trunk suppresses dial tone on an
incoming trunk call. If this feature is assigned to an extension, the exten-
sion does not receive dial tone whenever dialing is initiated.
When applied to DISA trunks, the option suppresses the initial dial tone
returned for dialing the DISA feature access code. The second dial tone,
after a successful code is dialed, is not affected by the option.
Dial Tone - Discriminating
Description An
extension having a feature enabled that prevents calls from ringing the
extension hears a distinct dial tone (350/440 Hz, 400 ms on, 100 ms off
for six cycles, then continuous tone) when going off-hook to make a call.
These features include Do Not Disturb, Call Forwarding - Follow Me, or
Call Forwarding - I Am Here.
Conditions
The following conditions apply to this feature:
l
The tone heard is the same one that is used for Transfer Dial Tone.
l
COS Option 701 (No Dial Tone) must be disabled.
Programming
Enable COS Option 219 (Discriminating Dial Tone) for the extension,
Operation None.
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