10 - 8
RS-232 Cables
Connect the HomeBase to the host workstation or other device by plugging an RS-232 serial cable into the
page 10-3) on the back panel. The wiring of your cable depends on whether the other device is set up as a Data Communication
Equipment (DCE) or Data Terminal Equipment (DTE) device.
The HomeBase is configured as a DCE device. To communicate with another DCE device, use either a null modem adapter in
line with a standard RS-232 cable, or a null-modem serial cable. To communicate with a DTE device such as a computer, use a
standard (or straight-through) RS-232 cable.
You can make your own cables by following the pin configuration in the chart below. To do so, you must determine if your host
RS-232 device is 9-pin or 25-pin, and whether it is configured as a DCE or DTE device.
RS-232 Pin Configuration
Note: The HomeBase
cannot
be daisy-chained.
HomeBase /Host Port (DCE)
IBM AT DB9 (DTE)
IBM XT DB25 (DTE)
Modem DB25 (DCE)
Pin / Input Signal
2 / (RD)
2
3
2
3 / (TD)
3
2
3
5 / (SG)
5
7
7
4 / (DTR)
4
20
6
6 / (DSR)
6
6
20
7 / (RTS)
7
4
5
8 / (CTS)
8
5
4
Summary of Contents for Dolphin 7850 Series
Page 1: ...User s Guide Preliminary Dolphin 7850 Series Microsoft WindowsMobile 5 0 ...
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