ConneXions CONX8/1 Single Port, Mains USA Version
CONX8/1MAN 10/00
Issue 4
16
Appendix A
Comp 2 or People Finder Protocol
The system must be programmed with valid pager types or ranges. The system can be
configured as Numeric, Alphanumeric or mixed. In the case of mixed systems the ranges must be
defined at the time of ordering within the overall range 1 through 9,999. E.g. this could be ID 1 to
1000 reserved for numeric and 1001 to 9,999 for Alphanumeric. Remember that the range
selected must allow for Group Calls as well as individual pager ID’s. The reason for the range
requirement is due to the change in the transmitted data word format under the POCSAG
standard, coupled with the fact that the serial data provided by the host under this format does
not allow the transcoder to differentiate between numeric and alphanumeric data formats.
Example Numeric serial message string transmitted from the host to the transceiver:-
1234A<CR>1234567890U[-]
<CR>
The data starts with a one to four digit number followed by a beep type, (A,B,C or D) and then a
‘carriage return’ <CR>. This is then followed by the message (20 digits max) and another
‘carriage return’ <CR>.
On sending a message to the unit in the correct format the transcoder will immediately
recompose the string into the POCSAG format and transmit the same at the pre-programmed
baud rate. The time taken to transmit the message is dependent upon the pager baud rate and
the length of the message string.
Example Alphanumeric serial message string:-
1234A<CR> This is a message <CR>
The sequence is exactly the same as for Numeric data except that the information transmitted
can include the ISO 646 character set (full alphabet including both upper and lower case).
Comp 2 can also provide message prioritization on certain Scope systems equipped with
message buffering. This utilizes the A,B,C,D beep type to set the level of priority. Certain Scope
products will also accept this format without the beep type included in the message string. This
will invoke a default beep type being inserted by the transcoder.
Comp 1 Protocol
This is a simplistic interface which accepts a serial data string from the host and adds a single
cap ID or address to the string enabling it to be transmitted to pagers globally.
Example Alphanumeric serial message string:-
This is a message <CR>
On receiving a valid message string the transcoder will immediately add the pre-programmed ID
and beep type, recompose it into the POCSAG format and transmit the same at the pre-
programmed baud rate. The time taken to transmit the message is dependent upon the pager
baud rate and the length of the message string.
