8
Facilities available to the telephone user
A telephone subscriber using a DTMF telephone can access the following facilities provided by the 960 telephone
interconnect. These facilities are available after the 960 has answered the call and played its recorded instruction
messages. To make a call to a station on the HF network a channel must be selected and the Selcall number of the
station required must be entered, after which the 960 will send the selcall and if successful an audible reply will be
heard from the station being called. If this audible reply (revertive call) is not heard another channel should be
selected and the call repeated.
Selecting a channel
The 960 can store up to 50 channels. These are selected as follows:-
Press the two digits, representing the channel number required, on the DTMF key pad of the phone being
used. Valid channel numbers are from 01 to 50. Alternatively for channels 1 to 9 can be selected by pressing
a single digit followed by the '#' key. i.e. 1# selects channel one. Once the second number is pressed, the
request is processed and a stored voice will repeat back the channel number.
The second option is especially useful for telephone systems which have STD-bar limits placed upon them.
These telephones usually have a system fitted which prohibits the first digit pressed from being a zero.
Note:- channel numbers must be two digits in length. e.g. Enter 03 or 3# instead of 3.
Note:- once channel entry commences HF receiver noise will disappear until the DTMF function being entered is
complete. This lack of HF receiver noise identifies that you are still in the DTMF request sequence.
Sending a Beacon Request
A beacon request is used to test to see if a channel is "open" to a HF station you may wish to call later with a
Selcall. A beacon request does not alert the HF station being called. After the beacon request is sent a confirmation
tone (revertive call) will be heard from the HF station, the strength of this confirmation tone (revertive call) indicates
the quality of the channel for communication. If no confirmation tone (revertive call) is heard try another channel.
A beacon request can be sent to any HF station that has an access level that allows it to receive Selcalls (access
levels are set in the 960 by the system supervisor and are described in the setup section within this manual).
To send a beacon request, press the '*'(star) key on the telephone key pad.
If the '*' key is recognised the receiver noise will disappear. Some DTMF telephones do not send the '*' and '#'
tones. This should be tested before the system is first used.
Then enter the 4 digit selcall ID of the transceiver you wish to contact using the telephone key pad. Press the '*'
button to send the beacon request. The tones of the beacon request selcall being sent will now be heard.
To re-send the last sent beacon request, press ‘**’(star twice) on the telephone key pad.
Sending a Selcall
A selcall is used to call a HF station and alert the operator that you wish to commence communication with that
station. After the selcall is sent a confirmation tone (revertive call) will be heard from the HF station indicating the
station has received the call. If no confirmation tone (revertive call) is heard try another channel.
A selcall can be sent to any HF station that has an access level that allows it to receive Selcalls (access levels are
set in the 960 by the system supervisor and are described in the setup section within this manual).
To send a Selcall, press the '*' key on the telephone key pad.
