Hand Held Products 7900 Series - Manual (Page 209)

Dolphin® 7900 Series Mobile Computer User’s Guide 12 - 9
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.
RS-232 Pin Configuration
Note: The HomeBase cannot be daisy-chained.
Setting up the Terminal for ActiveSync Communications
1. On the terminal, tap Start > ActiveSync > Tools > Options. Activesync opens displaying the PC tab.
2. In the Use this PC drop-down list, select the name of the host PC.
3. Select Sync with this PC during manual sync to indicate that the terminal syncs with the selected host PC when
synchronization is run from the terminal.
4. Tap OK.
Communicating with the Dolphin 7900 Terminal
To initiate communications between the Dolphin and its peripheral, complete these steps:
1. Insert the Dolphin terminal into the terminal well of the HomeBase.
• The DOCK LED lights green. If the DOCK LED does not illuminate, make sure that the terminal is properly seated. You may
need to remove and re-insert the terminal.
• The Dolphin terminal activates; if the power is off, the terminal automatically powers on. If the terminal does not power on,
verify that the Hand Held Products power supply is properly connected to the cradle and plugged into a functioning outlet.
• The Dolphin terminal automatically opens ActiveSync to establish a connection.
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