Codan 8525B Series Handbook page 150

Notes If you do not answer the call immediately, once the call is stored in
cont. memory your Radiophone will continue to give out 'pips' every four
seconds to indicate that a call has been received. If you wish to silence
these 'pips', yet still retain the display, press the Selective Channel button.
If you only wish to receive selective calls, ensure the S'Call Mute button
is operated and the indicator lit.
If the microphone PTT button is not pressed before the end of the tones:
•
the called display will remain on to indicate that a call was received
•
a 'pip' will be heard every four seconds
•
the external alarm relay contacts will close for approximately two
minutes (refer to section 5, Using the external alarm feature).
Outback HF Radiophone
RFDS and Telstra services
q
10-13