The serial cable shipped with the Challenge S server can be used to connect a printer or character (ASCII) terminal. You can also use a 3-wired standard Macintosh® (Plus, SE, or II computer) to Imagewriter^[tm] I cable. (Note that the Imagewriter II cable does not work). The cable connector pin assignments for this cable are shown in Table B-1.

Use a full-handshake serial cable, which includes request-to-send (RTS) and clear-to-send (CTS) connections, for a modem with RTS/CTS flow control. You can use this cable for all serial devices except terminals and serial printers (any application that doesn't need RTS flow control). For example, you can use this cable for a 3-wire application. This cable can be used with a null modem adapter for serial printers and dumb terminals. You can purchase the full-handshake serial cable from Silicon Graphics or your local service provider.

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Note: You cannot use a standard Macintosh serial cable. The Macintosh cable does not have the correct pinout for full flow control.

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The cable connector pin assignments for this cable are shown in
Table B-2.

To use the devices below, you'll need a serial adapter cable supplied by Silicon Graphics.

The Silicon Graphics adapter cable is used to convert the serial cable that came with the device to a Silicon Graphics DIN-8 serial cable connector. This cable then connects to the serial connector on the back of the Indy chassis. The cable connector pinout assignments are shown in Table B-3.

To use a serial device designed for personal computers using a DB-9 connector, you'll need a PC adapter cable. To obtain the cable, contact your local service provider. This adapter cable is used to convert from the PC's DB-9 pinout to the Indy workstation's DIN-8 pinout.

The cable connector pinout assignments for the PC adapter cable are shown in Table B-4.