4-52 System Programming
4.3.1 Trunk Group
Parameter
Value Range
(default)
Description/Function Reference
Specifies whether or not the system sends the pseudo
dial tone to the extension user who seizes a CO line.
[Note]
• This assignment is required if the Central Office does
not send a dial tone to the caller.
Used to disconnect the trunk line if the system detects a
cyclic signal during a CO-to-CO line call by DISA.
Used to disconnect the trunk line if the system detects a
continuous signal during a CO-to-CO line call by DISA.
Used to disconnect the trunk line if the system detects
no signal during a CO-to-CO line call by DISA.
1. Enable
2. Disable
(Disable)
1.
No check
[Disable]
2. Check
[Enable]
(Check)
1. No check
[Disable]
2. Check
[Enable]
(Check)
1. No check
[Disable]
2. Check
[Enable]
(Check)
PBX dial tone
Cyclic Signal
Detection
Continuous
Signal Detection
Silence
Detection
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