MIDIbox

A designation for a particular type of connector.

DB-25M Function Abbreviation
Pin #1 Chassis/Frame Ground GND
Pin #2 Transmitted Data TD
Pin #3 Receive Data RD
Pin #4 Request To Send RTS
Pin #5 Clear To Send CTS
Pin #6 Data Set Ready DSR
Pin #7 Signal Ground GND
Pin #8 Data Carrier Detect DCD or CD
Pin #9 Transmit + (Current Loop) TD+
Pin #11 Transmit - (Current Loop) TD-
Pin #18 Receive + (Current Loop) RD+
Pin #20 Data Terminal Ready DTR
Pin #22 Ring Indicator RI
Pin #25 Receive - (Current Loop) RD-
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