Tally Genicom MATRIX PRINTER 2250 - Manual (Page 186)

Serial interface
Type RS232C interface
Synchronization Asynchronous
Transmission rate 600 bauds to 19,200 bauds
Signal status OFF = Mark = log. 1 = -3 V to -15 V
ON = Space = log. 0 = +3 V to +15 V
Connection cable Length up to 15 m
Interface connections ITT Cannon connector, series DB-25 S
Transmission protocol XON/XOFF, ENQ/STX, READY/BUSY,
Robust XON/XOFF, ACK/NAK, ETX/ACK
Capacity of data buffer 64 KB max.
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Reference manual Specification
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