DataPage MK2 (USA) Desktop UHF Radio Paging System
DPUSA 02/00
21
Issue 2
Appendix A
Example of typical Command-Acknowledge Sequence:
CALLER RECEIVING
STATION
<CR> every 1 second unit…..
ID=
<ESC>PG1<CR>
<ESC>[p<CR>
<STX>1<CR>TEST<CR><ETX>190<CR>
(“TEST” is the message)
Processing-Please Wait<CR><ACK><CR>
(“190” is the Checksum)
+++,,,,,,,,,,ATHO<CR>
Carrier Drop
Example Checksum:
The following table shows an example of a complete block containing a correct checksum which is :
<STX>123<CR>ABC<CR><ETX>17;<CR>
Checksum = 17
DataPage II 9-Pin Serial Port
1-N/C
2
Receive Data (RX IN)
3
Transmit Data (TX OUT)
4
Data Terminal Ready (DTR OUT)
5 GROUND
(GND)
6-N/C
7 Request to Send (RTS OUT)
8
Clear to Send (CTS IN)
9- N/C
000 *
011 *
011 *
011
000 *
100
100 *
100 *
000 *
000 *
0010 *
0001
0010 *
0011 *
1101 *
0001 *
0010 *
0011 *
1101 *
0011 *
STX *
1
2
3 *
CR *
A *
B *
C *
CR
ETX *
*
*
*
1 0111
1 7
1011
; *