Kantronics MT1200, Руководство пользователя, Страница: 134 / 157

CTS - CLEAR TO SEND: The MT1200 uses this line to signal your computer when it
can no longer accept data from the computer, or to signal that it is again ready to accept
data. This pin is used for hardware flow control.
DSR - DATA SET READY: This line is set high to indicate that the modem is ON.
DCD - DATA CARRIER DETECT: The MT1200 uses this pin to signal the packet
“connect” status through the radio port of the MT1200. If you are connected to another
packet station, this output line to the terminal will be in active state. Some terminal
programs will indicate “ON-LINE” when DCD is active. If you are disconnected, this line
will be in inactive state.
DTR - DATA TERMINAL READY: Although interconnected via a buffer IC to the
processor, this line is currently ignored.
Software settings
When using a standard terminal program to communicate with the MT1200, you must
set the serial port configuration in your program for 8 data bits, no parity, and one stop
bit. The baud supported by the MT1200 are 1200, 2400, 4800, 9600, and 19200. In
general you should use the fastest baud your terminal program and hardware supports.
The MT1200 defaults with ECHO ON, so you should set your terminal program for “full-
duplex” operation.
Connecting to your Radios
The 1200-baud radio connector on the MT1200 rear panel is a 9-pin DB style
connector, with pin layout as shown below:
Radio port pin numbers and functions
The purposes of each pin are as follows:
1 TXA Transmit audio (AFSK out)
2 XCD External carrier detect
3 PTT Push-to-Talk
4 CTLB Control line B
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