Emulex DCP_link - Manual (Page 30)

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.
J1
SW2 SW1
J3
SW3 SW4
J2
Figure 2-16 Switch Locations on the 8-Port RS-232 Daughterboard
Each switch configures two ports, as detailed in the following table: