# To create a GNSS contact for a base dial‑in data link

1. Tap and select Settings / Connections. Select the GNSS contacts tab.
2. Tap New. The Edit GNSS contact screen appears.
3. Enter the GNSS contact name.
4. Set the Contact type to Dial‑in base.
5. If the modem at the base requires a PIN, enter the Modem PIN.

6. If required, in the Init string field enter the command to start communication and set up the modem options.

   The command must leave the base modem in auto‑answer mode. Alternatively, set the auto‑answer mode separately, using a Terminal program.

7. If required, edit the command for ending communication shown in the Hang up field. By default, this is set to ATH0.
8. Tap Store.