Handspring Treo 300 - Manual (Page 234)

Section 8
226 Advanced HotSync® Operations
Note: To perform a Network HotSync from another computer on your
network, you must select Network from the HotSync Manager menu on
both your primary computer and the computer you want to use.
3. From the HotSync Manager menu, choose Setup.
4. Click the Network tab and make sure your user name has a check
mark next to it. If the check mark is not there, click the check box
next to your user name.
5. Click OK .
6. Connect your phone to the cable and press the HotSync button.
The HotSync operation records network information about your
computer on your phone. With this information, your phone can
locate your computer when you perform a HotSync operation over
the network.