, . ; ; ..
, , . , . , , TCP/IP IPX/SPX . FTP (File Transfer Protocol), . Xmodem, Ymodem, Zmodem . , .
(COMx , LPTx ), .
, . , . , .
IBM- - RS-232.
RS-232C (I - , O - )
. DB-9 | . DB-25 | . | ||
DTR | O | |||
DSR | I | |||
RTS | O | |||
CTS | I | |||
RxD | I | |||
TxD | O | |||
DCD | I | |||
GND | - | |||
RI | I |
5.1.
5.1 RS-232C |
1 1 DTR. 2 DSR, ;
2 2 DTR;
3 1 RTS ( ). 2 CTS, , , RTS;
4 1, , , , ; RTS ;
|
|
5 2 , RTS, ;
6 1: , , RTS;
7 2 , , DSR CTS. , .
8 1 RTS DSR.
9 2 DSR CTS. , DTR.