Sun-microsystems Sun PCI High Speed Quad Port Serial Interface Adap Manual do Utilizador descarregar pdf (Página 53)

Appendix B Null Modem Cable Requirements 33

FIGURE B-2 illustrates a synchronous null modem cable that allows you to another

system, Sun or non-Sun, using the RS-449 interface. The Sun supplies both the

transmit and receive clocks for the other system. Note that this null modem cable is

not symmetrical.

FIGURE B-2 Null modem Cable (Sun System Supplies Clocking for Both Sides)

TxD (4,22)

RxD (6,24)

RTS (7,25)

CTS (9,27)

DSR (11,29)

SG (19)

DCD (13,31)

RxC (8,26)

DTR (12,30)

TxC (17,35)

Sun workstation

TxD (4,22)

RxD (6,24)

RTS (7,25)

CTS (9,27)

DSR (11,29)

SG (19)

DCD (13,31)

TxCI (5,23)

RxC (8,26)

DTR (12,30)

Sun or foreign

device

that supplies clocking

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