Sun Microsystems Interface Adapter manual To RS-449 Converter, Figure B-3X.21 to RS-449 Converter

X.21 to RS-449 Converter

FIGURE B-3illustrates the pin connections required for an X.21 to RS-449 converter.

T(2,9)

S (6,13)

C (3,10)

R(4,11) I (5,12) G (8)

X.21 interface

(15-pin connector)

FIGURE B-3X.21 to RS-449 Converter

TxD (4,22)

RxC (8,26)

TxCI (5,23) RTS (7,25)

CTS (9,27)

RxD (6,24)

DCD (13,31)

SG (19)

RS-449 interface workstation

(37-pin connector)

When using an X.21 conversion you must perform the following hsip_init operation:

#hsip_init hihp0 9600 txc=txc rxc=rxc

Note – Both receive and transmit clock inputs (RxC and TxCI) need a clock signal if txc is set to txc and rxc is set to rxc.

34 Sun PCI High Speed Quad Port Serial Interface Adapter User’s Guide • December 2005