Specifications

Enter in the desired order, numbers for the fixed digits, # symbols for the ident variable digits
and * symbols for the status variable digits. The order they are entered represents where in the
incoming string the DRC1 will extract ident and status information, and the sequence must
match that set in the mobile radio sets.
Emergency Call
Sets the code DRC1 expects from a mobile resource signalling for urgent attention.
RX Ack to TX call
This parameter determines what the DRC1expects to receive in response to a TX call to a
mobile resource. If a code is set here, then the DRC1 will display “calling” and “connected”
as the call goes out and the Ack comes back. If the Ack is not received, then the DRC1 will
display “No Answer”. If a code is not set into this parameter, then the DRC1 will
automatically display “Connected” when the call goes out even if the mobile called is not
responding.
RX Ack To Close
In systems where it is desired to re-mute the mobile after a conversation with control, the TX
code “TX-Close” is programmed with a suitable code. If an Ack to the close message is
required, it is programmed into this parameter.
RX Ack To Interrogate
In some systems the mobile may be interrogated for a currently set status. This interrogation
normally doe’s not require any intervention from the mobile operative, and the interrogation
call goes un-noticed by the mobile crew. The response to the interrogation call is set in this
parameter, and must contain one or more * symbols if the status is required.
RX Ack To Locate
It is possible to interrogate a mobile for its position. The position can be set as part of the
status field in simple systems, or be a GPS data string in more modern systems. The
parameter set here is the sell call response to the locate call. If status information is intended
to carry the location, then the parameter set here must contain one or more * symbols to send
status information. If the location fix is a GPS data burst, then the mobile should have a
suitable protocol embedded to provide the correct sequence.
TX Call
This parameter sets the normal call emanating from control under operator control. Like the
RX code fields, it is possible to mix identity digits with an outgoing status instruction. The #
and * symbols represent the position within the string of ident and status digits respectively.
Where fixed digits are also required, the correct values will be entered into the desired string
location. For example, 12##** would send the numbers 12 with every call, and the operator
entered digits in the ##** positions. It should be noted that the pattern of digits must
correspond with the field sizes set up in the string length sections of memory programming
listed above.