G/01141C
Edition 1
27/04/2012
MD-4931CFA Handbook
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Operator Handbook for CFA Door Phone G/01141C Issue 1 Page
10
3.14 Busy Tone Detect Selection
Brief
IP based telephone switches and VoIP analogue terminal adaptors can provide either North American busy
tone or Australian busy tone. All MD-4900 Series Door Phones can be set to detect either “US” or “AUS”
(default) busy tones for automatic disconnect.
Instructions
Remove the MD-4900 hideaway unit cover:
Locate LK2 - the three pin “US_AUS” jumper link circled below in red:
Position the shunt in either the US or AUS position.
Test for reliable busy tone disconnect and replace cover.
