Panasonic KX-TD500 System Reference Manual page 743

3.08 Off-Hook Call Announcement
(OHCA)
Description
When called extension is busy (busy tone is
returned), OHCA allows the attendant to inform
the busy party that another call is waiting through
built-in speaker of the called user's PITS
telephone.
OHCA works under the following conditions:
• OHCA key (Programmable key) is assigned the
Attendant Console.
• The called extension's telephone is PITS
KX-T7235, KX-T123230D, KX-T123235 or
KX-T7130 and OHCA button is assigned on it.
• The called extension is off-hook or OHCA
button is idle.
• The called extension is not headset mode.
APITS and DPITS
• Basic shelf, expansion shelf 1, 2 have
fifteen OHCA path which are connected
each other.
APITS
• To activate this function by PLC or HLC
card, OHCA card (KX-T96136) is needed.
DPITS
• A DPITS OHCA card is required on the
TSW card.
In the system programming, assign "Extension-
Station (1/4)", OHCA Circuit to "Yes" at the called
extension.
Programming
System Programming
"Configuration-System Assignment"
"Extension-Station (1/4)",
OHCA circuit
Attendant Management
OHCA key
Reference
VT Dumb
10-C-1.00 11-C-1.00
10-G-1.01 11-C-24.00
Reference
6-C-10.00
6-D-15
Conditions
OHCA does not work if "System-Class of Service
(1/3)", BSS/OHCA Deny is set to "Yes" at called
extension.
Operation
1. Dial the extension number.
• Busy tone sounds.
2. Press the OHCA key (program-
OHCA
mable key).
• Confirmation tone sounds.
Start talking.
In case OHCA is available for
the extension, the OHCA
indicator on the called
extension lights in green, and
confirmation tone of two beeps
sounds.
(Supplement)
When a call is transferred to the extension in
OHCA conversation status, the transferred call
will be placed on a PDN as soon as any PDN
becomes idle by pressing the RELEASE key.
<Example>
When answering an incoming CO call and
transferring it to the extension, if the extension is
busy, talk to the extension that you will transfer
the CO call by pressing the OHCA key. Then
press the RELEASE key.
As soon as any PDN becomes idle, the CO call is
placed on the PDN on the called extension.