Section 700 - Operation
Offhook Monitor is available on 44-Series phones only.
Offhook Monitor can be disabled system-wide.
CPC-96, CPC-288, and CPC-576 All Versions
Offhook Signaling sends a tone to a busy extension to indicate that another CO call has arrived or a
call is camped-on.
After receiving an offhook signal during a call:
1. Press the HOLD key.
2. Press the flashing FF key for the CO line of the incoming
Note: For details about handling multiple calls, see "Call Hold" on page 133.
FF3: CO Off-Hook Signal.
The CO call type may be multiple ring, direct, BLF Ring, or camp-on.
The System does not send the offhook signal under the following conditions:
• During a conference call
• During an OHVA or Busy override
• Data Privacy is enabled
• the receiving telephone is a 3rd party voice mail.
DBS 576 (USA), issued January 1999
Chapter 5. Key Telephone Features
First call on hold