HP iPAQ h5400 Series Reference Manual page 171

4. Make sure Internet Settings is selected.
5. Tap Modify, and then New.
6. Enter a name for the connection, select the modem type, and
then select the correct baud rate for that modem.
7. If you need to enter the TCP/IP settings, tap Advanced, and
then tap TCP/IP.
8. Select "Use specific IP address."
9. Enter your IP address.
10. Tap OK, and then Next.
11. Enter the phone number for your Internet Service Provider,
and then tap Next.
Reference Guide
Connecting
6–9