Emulex DCP_link DCP386i/486e Daughterboard Settings, Port RS-232 Daughterboard, DTE/DCE Selection

2-16 Chapter 2

DCP386i/486e Daughterboard Settings

This section provides configuration and installation instructions for the 8- port RS-232 full duplex DMA daughterboard (I.D.=BC) and the 8-port RS- 422/X.21 daughterboard. Both daughterboards are fully compatible with the DCP386i and DCP486e adapters.

8-Port RS-232 Daughterboard

The 8-port RS-232 daughterboard adds the following features to the Emulex DCP386i and DCP486e:

•All 8 serial ports may be individually configured as either DTE or DCE mode.

•RS232 voltage option.

•Backwards-compatible with the RS-232C 4-port daughterboard

DTE/DCE Selection

Switches SW1 through SW4 are used to select DCE or DTE operation. These switches are placed along the board edge as shown in Figure 2-14.

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

SW1

J3

SW3 SW4

SW2J1

J2

Figure 2-16 Switch Locations on the 8-Port RS-232 Daughterboard

Each switch configures two ports, as detailed in the following table: