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1.2 Making Calls
32 User Manual
To answer a callback ring set for a busy outside (CO) line
To cancel the callback ring (Automatic Callback Busy Cancel)
Sending a Call Waiting Tone to a Busy Extension (Busy Station
Signalling [BSS])
If the extension that you want to call is busy, you can send a call waiting tone, to inform the extension user
that your call is waiting. When the extension user hears this tone, he or she can choose to put the current
party on hold, and talk to you.
• If you do not answer the callback ring within 10 seconds (4 rings), this feature will be
cancelled.
• If you hear a reorder tone after dialling an extension number, this feature is not
available for the other party's phone. This feature is only available if the called extension
has set Call Waiting. To set Call Waiting, refer to "1.7.3 Receiving Call Waiting". To answer
a waiting call, refer to "1.4.4 Answering Call Waiting".
Off-hook.
PT/SLT
Talk.
Dial outside phone
number.
outside
phone no.
While hearing a callback ring
D.Tone
Off-hook.
PT/SLT
PT/SLT
Enter 2.
While hearing a busy tone after dialling an extension number
2