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1.3 System Features
Trunk Busy-out
Description
Allows the Manager and an Operator to busy out a CO line to prevent extension users from
accessing it.
[The details of Trunk Busy-out feature]
There are the following two types of trunk port relay status which is set to Trunk Busy-out.
a)
Busy (Loop Relay On) : making the line busy by hardware
b)
Idle (Loop Relay Off) : making the line busy by software
The Central Office recognises a trunk line as shown in the table "The Specification of Trunk
Busy-out On."
The actual behaviour of the PBX is as follows:
1.
Idle status
a)
When the PBX user makes a call:
The trunk line is recognised as busy and making a CO call is disabled.
b)
When the outside caller makes a call and then the Central Office gives the incoming call
to PBX:
The Central Office recognises the PBX as idle and the call is processed. (The outside
caller hears ringback tone.) However, even though the PBX receives the bell signal from
the Central Office, the PBX ignores it.
2.
Busy status (the status of grabbing a CO line) / during a conversation
a)
When the PBX user makes a call:
The trunk line is recognised as busy and making a CO call is disabled.
b)
When the outside caller makes a call and then the Central Office gives the incoming call
to PBX:
The Central Office recognises the PBX as busy and the caller hears busy tone.
Note
• The default of each card is "Idle." If it were "busy," there is a possibility that the Central
Office will mistakenly believe that there is something wrong with the trunk line.
Card Type
The state of Trunk Busy-out set to "On"
ELCOT
Idle status
(Default)
Loop OFF
100
The Specification of Trunk Busy-out On
Busy status (the status of
grabbing a CO line)
Loop ON
Note
Features Guide
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