Call Waiting.....

Feature Description

This feature notifies an extension user, currently engaged on an established call, that another call is waiting to be answered. On a digital set notification is by a flashing lamp associated with the Call Waiting key and a buzz tone through the loudspeaker of the set. On analogue sets notification is by two bursts of tone through the ear-piece of the handset.

The user can put the first call on hold, answer the second call, and return to the first call when desired. The analogue set use a Flexible Feature Code to activate and deactivate this feature and the digital extensions must have a dedicated key.

There is an option to notify that internal calls and/or external calls are waiting.
Feature Implementation
In order for call waiting to work, an extension must be forward busy denied (FBD) and hunting denied (HTD).
For analogue sets, allow the Class of Service Call Waiting (CWA), Internal Call Waiting (SWA) and Warning Tone (WTA).
For digital sets, allow the Class of Service Internal Call Waiting (SWA) and Warning Tone (WTA). The Call Waiting feature must be allocated to a key.



Example
In this example Call Waiting has been assigned to an analogue TN
===========================================

LD 10
Load Program 10.

REQ   CHG  
TYPE   500  
TN   x x x x = Terminal Number
ECHG   YES  Easy Change
ITEM   CLS CWA SWA WTA  Call Waiting, Internal Call Waiting and Warning Tone allowed. 
ITEM     Carriage return back to the REQ prompt

In this example Call Waiting has been assigned to key z on a digital TN.

===========================================
LD 11
Load Program 11.

REQ   CHG  
TYPE   xxxx xxxx = Telephone Type 2616, 2008 etc
TN   y y y y = Terminal number
ECHG   YES  Easy Change
ITEM   CLS SWA WTA  Internal Call Waiting and Warning Tone allowed. 
ITEM   KEY z CWT  Call Waiting allocated to key z
KEY   Carriage return back to the REQ prompt
===========================================
to change  ffc

LD 57
req     chg
type      ffc
cust    0
...
code    CWGA    <enter>
CWGA    *9