HP rp4440 HP DTC Cabling and Racking Guide - Page 56
DB25 Direct connection to HP Vectra PC's 9-pin connector, RS-232 DB25 Direct connection to HP
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7 RS-232 connection DB25 Direct connection to HP Vectra PC's (9-pin connector) This cabling scheme is recommended for connecting to the following HP Vectra interfaces: HP Vectra with 9-pin connector: HP Vectra interfaces: 386/XX,486/XX 24540B port A, 24541B port A 25-pin male connector to DTC 1 - PGND - 2 - RD INPUT 3 - TD 7 - SGND OUTPUT - 8 - RTS 22 - CTS OUTPUT INPUT 9-pin female connector to Vectra 3 - TD 2 - RD OUTPUT INPUT 7 - RTS 8 - CTS 6 - DSR 5 - SGND OUTPUT INPUT INPUT - 1 - DCD 4 - DTR INPUT OUTPUT 9 - RI INPUT RS-232 DB25 Direct connection to HP printer with hardware handshake This cabling scheme is recommended for connecting the following devices when a hardware handshake is necessary: HP Laserjet HP Ruggedwriter HP648A/P, 86A/D, HP33440A/F, 47A/F, 49A, 59A, 41063A, C1200A, C1202A Hp 2235 Note 25-pin male connector to DTC 1 - PGND - 2 - RD INPUT 3 - TD 7 - SGND OUTPUT - 8 - RTS 22 - CTS OUTPUT INPUT 9-pin female connector to Vectra 1 - PGND - 2 - RD OUTPUT 3 - TD INPUT 7 - SGND - 4 - RTS OUTPUT 20 - DTR OUTPUT HP Laser printers provide hardware flow control of host ports using DTR on pin 20. The HP DTC family provide hardware flow control of devices using RTS/CTS on pins 8 and 22. 50