• If you do not answer within a specified time period, this feature will be cancelled.
• Availability of this feature depends on the ISDN service of your telephone company.
Sending a Call Waiting Notification (Call Waiting)
You can inform the called party that your call is waiting.
This feature is also known as Busy Station Signalling
(BSS).
• Depending
on the type of the other party’s telephone, you may be able to talk to the other
party using the speaker and the microphone (Off-hook Call Announcement [OHCA]), or you
can send a call announcement through the handset (Whisper OHCA), if they are having
another conversation using the handset.
Refer to "1.9.3 Receiving Call Waiting (Call Waiting/Off-hook Call Announcement [OHCA]/
Whisper OHCA)".
• Depending on system programming and the called extension’s setting, a call waiting tone
may be sent automatically without performing the operation above.
User Manual 43
1.2.4 When the Dialled Line is Busy or There is No Answer