Satel SATELLINE-1AS User Manual page 21

APPENDIX 1.
The timing diagram of RS-232 interface of SATELINE-1AS and SATELLINE-2AS
radio modems.
RTS/CTS handshaking must be used in data speeds 2400 bit/s and 4800 bit/s. The timing
of the data transfer is the
following:
RECEPTION
DTR / pin 1
(pwr on)
RD / pin 9
CD/ pin 2
In data speeds 300 bit/s - 1200 bit/s no handshaking is needed. The timing of the data
transfer is as follows:
SENDING
DTR / pin 1
(pwr on)
RTS / pin 13
CTS / pin 6
TD / pin 11
RECEPTION
DTR / pin 1
(pwr on)
RD / pin 9
CD/ pin 2
SENDING
DTR / pin 1
(pwr on)
RTS / pin 13
CTS / pin 6
TD / pin 11
30 ms
(wake-up time)
30 ms
30 ms
30 ms
SATELLINE-1AS and SATELLINE-2AS
DATA
8 ms
DATA
DATA
DATA
21