NEC DS1000, Описание продукта

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Section 3: Features
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Section 3: Features DS1000/2000 Product Description
Tandem Trunking / Unsupervised Conference
Availability: All versions.
Tandem Trunking allows an extension user to join two outside
callers in a trunk-to-trunk conference. The extension user can
then drop out of the call, leaving the trunks in an Unsupervised
Conference. The extension user that established the Conference
is not part of the conversation. The Conference continues until either outside party hangs up.
Tandem Trunking uses a Conference circuit. The following table shows the system’s Conference
capacities:
Far End Disconnect Use this timer to set the loop disconnect interval for trunk calls.
If the system detects a loop current interruption longer than this
interval it assumes the telco has disconnected the trunk. It then
returns the trunk to idle.
Minimum Single Ring
Detection Timer
The system uses this timer to detect valid ringing signal from the
connected telco or PBX. Valid single ring must be longer than
this interval.
Minimum Double Ring
Detection Off Timer
The system uses this timer to detect valid double ring from the con-
nected PBX. Valid double ring must be longer than this interval.
Maximum Double Ring
Detection Off Timer
The system uses this timer to detect valid double ring from the
connected PBX. Valid double ring must be less than this interval.
Ringing Signal End
Detect Timer
If the ringing signal on a trunk call is interrupted for longer than
this interval, the system assumes ringing has stopped and termi-
nates the call.
P.F. Recovery Detect
Timer
When the ATRU PCB recovers from a power failure, it checks
the power failure trunk (trunk 1) for loop current for the P.F.
Recovery Detect interval. If loop current is detected, it assumes
the Power Failure Telephone is still connected and does not tear
down the call. If loop current is not detected, the ATRU PCB
switches the trunk out of the power failure mode.
Description Capacity
Conference circuits 32
Maximum simultaneous users in Conference
(total of all Conferences system-wide)
32
Maximum simultaneous conferences 8
Maximum parties in any one Conference
(trunks and/or extensions)
8
Table 8: Trunk Timers
(Continued)
Option Description
Join two callers in
Conference, leave the call
and let their conversation
continue.