Emulex DCP_link manual Port RS-422/X.21 Daughterboard, Setting DTE or DCE Operation

2-18 Chapter 2

8-Port RS-422/X.21 Daughterboard

This section provides configuration and installation instructions for the eight port RS-422/X.21 Each serial port may be individually configured as either DTE or DCE with the aid of null-modem cables. All ports support RS-422A.

Setting DTE or DCE Operation

NOTE: Throughout this document, DCE refers to internal clocking and DTE refers to external clocking.

SW1 SW2 J1

J3

SW3 SW4 J2

Figure 2-17 Switch Locations on the 8-Port RS-422/X.21 Daughterboard