Raymarine Ray54E - Manual (Page 51)

Chapter 5: Digital Selective Calling (DSC) 41
➤
To accept the Group Call:
Push the
CH knob. The alert tone is muted (if you have not already pressed
another key). The LCD indicates that the channel has been changed to the one
designated by the caller.
If the caller requests that you change to an unsupported working channel the
message
INVALID CHANNEL appears on the LCD. The radio is unable to
comply with the channel change request but the call is registered in the Call
Log.
No acknowledgement is sent to the caller. You can establish voice
communications on the channel shown in the LCD by pressing the
PTT key.
Notes: (1) DSC Call data is stored in the first available slot in the Call
Log.
(2) Pressing the 16/PLUS key cancels the channel change request
and tunes the radio to channel 16.
(3) If 5 minutes elapse before the Group Call is accepted or
rejected, the radio automatically declines the call and the radio
reverts to the original channel.
(4) To conform with regulations of the Basel Agreement for
radiotelephone service on inland waterways, DSC functions
are disabled when ATIS is active. See ATIS Function on
page 79.