ConneXions II V7 MAC US Multi Port, Mains, USA Version
CONV7MACUS 02/00
Issue
2
17
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
