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DataPage MK2 (USA) Desktop UHF Radio Paging System
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.
DPUSA 02/00
Appendix A
19
Issue 2
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