Panasonic KX-NS700 Feature Manual page 73

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Callback Start Timer
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Warning Tone Start Timer
–
Disconnect Timer
These timers behave and operate according to the following chain of events:
1.
When the unattended conference is established, the Callback Start Timer will begin.
2.
When the Callback Start timer expires, the Unattended Conference originator's extension will start to
receive a callback ringing from the PBX and the Warning Tone Start Timer begins.
3.
When the Warning Tone Start Timer expires, the remaining parties of the conference will start to
hear a warning tone, the callback ringing will continue to be heard at the Unattended Conference
originator's extension, and the Disconnect Timer begins.
4.
When the disconnect Timer expires, the conference is disconnected.
If the Unattended Conference originator returns to the conference before the line is disconnected, all
timers are cleared.
•
If the originator of a conference with two CO lines leaves the conference, the call can become a CO-to-
CO line call, if enabled through system programming.
–
When a CO-to-CO line call is established, the call will end when the CO-to-CO Line Call Duration timer
has elapsed (→ 4.1.17 CO Line Call Limitation). The timer applied is that of the trunk group containing
the CO line being used for the call immediately preceding the conference. The timer cannot be
extended.
–
If both CO lines are analog CO lines, the end of the CO-to-CO line call may not be detected. For this
reason, if analog CO lines are used, it is not recommended to enable the establishment of CO-to-CO
line calls after a conference call through system programming.
•
When a KX-UT series SIP phone is used to originate a conference and one of the other parties leaves the
conference, the KX-UT series SIP phone user will still be able to talk to the remaining party but will not be
able to use the standard Hold feature.
•
When conference members are non-IP extensions (e.g., DPTs or SLTs) and when the conference call is
made on non-IP CO lines (e.g., analog, ISDN), a DSP card is not required.
•
It is possible to select which of the following devices to use when making a conference.
–
PBX MPR
–
Optional DSP card
Better sound quality can be achieved by selecting the optional DSP rather than the PBX MPR. However,
in this case DSP resources will be used.
•
DSP Resource Usage
A conference call requires a certain number of DSP resources. If all DSP resources are in use, this
operation cannot be performed. To ensure a minimum level of performance, DSP resources can be
reserved for conference calls. (→ 5.1.18 DSP Resource Usage)
PC Programming Manual References
9.33 PBX Configuration—[1-5] Configuration—DSP Resource
10.3 PBX Configuration—[2-3] System—Timers & Counters—DISA / Door / Reminder / U. Conf
→Unattended Conference—Recall Start Timer (x60s)
→Unattended Conference—Warning Tone Start Timer (s)
→Unattended Conference—Disconnect Timer (s)
10.7.1 PBX Configuration—[2-7-1] System—Class of Service—COS Settings—CO & SMDR—Transfer to
CO
10.9 PBX Configuration—[2-9] System—System Options—Option 2—CO - CO Call Limitation—After
Conference
10.9 PBX Configuration—[2-9] System—System Options—Option 3
Document Version 2017-06
4.1.18 Conference
Feature Manual 73