Mitel SX-200 Documentation page 292

SPEECH PATH BUSY-OUT
Description
This feature allows a particular speech path circuit to be busied-out, or
be put in service again.
Conditions
None
Programming
An access code must be assigned to Feature Number 19
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(Maintenance Function).
Operation
(Where 555 is the Maintenance Function Access code.)
From the console or test line:
To busy out a speech path:
Dial 555 + 33 + the speech path number (01-31) - speech path
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busied-out.
Press the RELEASE button.
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To debusy a speech path:
Dial 555 + 43 + speech path number (01-31) - speech path
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debusied.
Press the RELEASE button.
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