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Dial Tone Detection
Description
If a trunk has Dial Tone Detection enabled, the system monitors for dial tone from the Telco or PBX when
a user places a call on that trunk. If the user accesses the trunk directly (by pressing a line key or dialing
# 9 and the trunk number), the system drops the trunk if dial tone does not occur. If the user accesses
the trunk via a Trunk Group (by dialing a trunk group code or automatically using a feature like Last
Number Redial), the system can drop the trunk or optionally skip to the next trunk in the group. Refer to
the chart under Programming for more information.
Conditions
None
Default Settings
Disabled for manually dialed calls; enabled for automatically dialed calls.
System Availability
Terminals
All Terminals
Required Component(s)
None
Related Features
Automatic Route Selection (ARS)
Call Appearance (CAP) Keys
Central Office Calls, Placing
Last Number Redial
Save Number Dialed
Speed Dial – System/Group/Station
T1 Trunking (with ANI/DNIS Compatibility)
Trunk Groups
Trunk Group Routing
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