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DataPage MK2 (USA) Desktop UHF Radio Paging System
Appendix A
Industry Communications Protocols
This section deals with the serial data formats commonly used within the On-site Paging Industry. Scope has its
own proprietary protocol, but can for certain systems provide a number of other industry-recognized protocols.
Warning! Check the protocols available for any given unit before quoting for a specific application. Maximum
permissible message lengths will apply. Numeric will always limit to 20 digits. Alphanumeric will depend upon the
product in question or the software issue employed. Check before quoting or ordering.
Scope Protocol
Numeric Pagers
Example serial message string transmitted from the host to the transceiver:-
N0012300A1234567890<CR>
The 'N' informs the transcoder that this message is destined for a Numeric pager. Any data not preceded by this
will be ignored. The maximum message length within the characters allowed for the Numeric transmission
format is 20.
Next follows the 7digit pager identity number. All seven digits must be used.
The letter following the identity is the beep type of which there are four valid characters, A, B, C or D.
Next follows the message to be transmitted, which can include:
0-9, space, -(hyphen), 'U' (letter U for 'U'rgent), [,] open/close square brackets, (open square brackets can also
be used to identify the letter 'C' for 'C'ancel). The final character sent is 'carriage return' <CR>, which is not
transmitted but represents the end of message marker.
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.
Alphanumeric Pagers
Example serial message string:-
A0012300A This is a message <CR>
The data format is exactly as for numeric pagers, except that the recognition character at the front of the
message is changed from an 'N' to an 'A' and the data can include the ISO 646 character set (full alphabet
including both upper and lower case). The maximum message length will be from 512 to 2,000 characters
depending on the software issue installed.
Transmission baud rate: in the above example, the default baud rate is sent.
To change the transmission baud rate in a message string, placing a letter "N" after the "A" will alter it to 512
baud. Placing a letter "F" after the "A" will alter it to 1200 baud.
The default setting for transmission to pagers on Scope transmitters is 1200 baud.
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DPUSA 02/00
Issue 2
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