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10 - 8 Dolphin® 9500/9550 Mobile Computer User’s Guide
Communications
Communications Types
RS-232
The HomeBase supports RS-232 communications via the RS-232 Communications Port located on the back of the device. This
port enables the Dolphin terminal to communicate to a personal computer, modem, or any RS-232 device using a standard serial
cable and communications software.
USB
The HomeBase also supports USB communications via the USB port located on the back. The HomeBase acts as a USB device
by interfacing the USB signals of the Dolphin 9500/9550 to the USB of the host computer. Using a standard USB cable, the
HomeBase’s USB interface allows the Dolphin terminal to communicate with a personal computer or to be networked through a
USB hub.
Note:
The HomeBase should have only one type of interface cable connected at a time, either USB or RS-232. You must be
using ActiveSync, version 3.7 or higher.
Equipment Requirements
To use the HomeBase for communications, you need the following equipment:
• A HomeBase powered by the HHP power cable and HHP power adapter cable
• For RS-232 communications, a Serial cable
• For USB communications, a USB cable
Setting up the HomeBase for RS-232 Communications
Connecting the Cables
Connect the HomeBase to the host computer or other device by plugging an RS-232 serial cable into the RS-232
Communications Port on the rear of the HomeBase. The wiring of your cable depends on whether the other device is set up as
a Data Communications Equipment (DCE) or Data Terminal Equipment (DTE) device.
The HomeBase Communication Port is configured as a DCE device. To communicate with a 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.
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