Panasonic KX-TD500 System Reference Manual page 1029

When "***** Waiting" is displayed
"***** Waiting" may be displayed when saving the changed data of the following
items during On-line programming. These items can only be changed when all of the
trunks belonging to the trunk group are not in use. If any trunk is used, you have to
wait until all of the trunks are not in use or cancel the waiting mode by pressing the
CTRL + C keys simultaneously. Then try again during a slower period.
This restriction is only for On-line programming, not for Off-line programming.
When changing trunk group type
• If a trunk group changes "Group-Trunk Group", Type assigned to "PVL" (Private
Line) to another type and if any CO lines belonging to the trunk group are selected
to be "PRV-CO" (Private CO) in "Extension-Station, Type/Number, those CO lines
are canceled from "Extension-Station", Type/Number automatically.
• Changing "Type" to "PVL" (Private Line) from any other modes cancels "Single
CO" or "Group CO" assigned to a DN button of an extension belonging to this
trunk group in "Extension-Station", Type.
• It is impossible to change from "DID" or "TIE" to any other modes and vice versa if
any CO line in "Trunk-CO Line" belongs to the "Group-Trunk Group".
When changing the setting "Incoming Mode (Day)"
• If "Incoming Mode (Day)" is changed from "DIL 1:1" to another mode,
The trunk group changed to another mode in "Group-Trunk Group", Incoming
Mode (Day) is assigned in "Trunk-CO Line", Trunk Group. The "Trunk-CO Line",
Direct Termination setting is canceled.
• If "Incoming Mode (Day)" is changed from "DIL 1:N" to another mode,
"Group-Trunk Group", Destination (DIL 1: N only) setting is canceled.
Changing a tenant of Trunk Group and CO Line
1 Confirm the trunk group to be changed a tenant has no CO line.
2 Change a tenant number of the trunk group.
3 Set the trunk group number of a CO line which is pre-installed status.
4 By saving the CO line screen, the CO line's status is set to OUS.
5 Change the status of the CO line to INS.
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