Panasonic KX-TD500, Features Manual

Page: 174 / 398

General Features
174 Features Guide
Off-Hook Call Announcement (OHCA)
Description
OHCA allows the extension user to inform a busy extension (engaged in a call using the
handset) that another call is waiting by talking through the built-in speaker of the busy
extension's PT. If the existing call is performed over the handset, the second conversation is
made with the speakerphone so that the called extension can talk to two parties independently.
OHCA is performed the same way as Busy Station Signaling (BSS). It depends on the
telephone type of the called party whether BSS or OHCA is activated by the operation. If the
called extension is KX-T7130, KX-T7235 or KX-T7436, OHCA becomes active.
Conditions
• Call Waiting
OHCA is only effective when the called extension has set Call Waiting. If not, the caller
will hear a reorder tone after dialing the extension number.
• BSS / OHCA / Whisper OHCA
If an extension user dials "1" while hearing a busy tone, BSS or OHCA or Whisper OHCA
will be activated at the called extension.
This is determined by the following conditions.
• BSS, OHCA and Whisper OHCA do not function, if the other extension is a DN type PT.
Hardware Requirements
• DPT
Basic shelf, expansion shelf 1, 2 have 16 OHCA paths which are connected each other.
• APT
To utilize this feature, the OHCA card should be installed on a PLC card or HLC card
beforehand.
• DPT
To utilize this feature, the DOHCA card should be installed on the TSW card beforehand.
Calling extension Called extension
COS-OHCA
assignment
Call Waiting setting
OFF ON
0 1 2 3
Disable —— BSS BSS BSS
Enable —— BSS OHCA
*1
BSS
*1
OHCA (Off-Hook Call Announcement) is activated when the called extension is KX-T7130, KX-T7235 or
KX-T7436.
W-OHCA
*2
OHCA
BSS
*2
Whisper OHCA is activated when both calling and called extensions are using one of the KX-T7400 series PTs.