# Connect to RTU using Phone Line and Modem

To connect to an RTU via a phone line, follow the steps as described below:

1. If you have not already, start the Alarmware™ application.
2. You will be presented with a Select RTU dialog box.
3. Choose an existing RTU from the list or add a new RTU via the Add button.
4. With the proper RTU highlighted, click on the Connect Phone button.
5. Alarmware™ will attempt to connect to the RTU. If the unit is ready to accept incoming calls you should be able to make the connection rather quickly.
6. Upon establishing connection with the RTU, if PINs have been configured for this RTU, you will be prompted to enter a valid PIN of at least "Program" privilege level. Exception: If you have previously entered a PIN in the special Retained Alarmware™ PIN dialog box and the "Save PIN for future use" box has been checked, the entry of that PIN will be done automatically by Alarmware™..
7. Alarmware™ then checks for agreement between the configuration in its database and the configuration of the RTU.
8. If there is any mismatch, you will be presented with a choice of either importing the Catalyst's current configuration into Alarmware™ or exporting the Alarmware™ configuration to the RTU. You must do one or the other before you will be able to proceed with the session.

Troubleshooting: If the unit does not make connection:

1. Verify that the basic RTU information is correct, especially the phone number with any necessary prefixes or delays (delays are invoked with a comma for every one second of delay desired).
2. Verify that your Modem Settings are correct.
3. Verify that the unit is not in use from the Front Panel, and is ready to accept incoming calls.