# Configure Programmable RS-232 MWI

The programmable RS-232 message waiting indicators interface is configured entirely offline, through the RS-232 Only Application Menu. This procedure assumes that the appropriate server hardware and software have been installed.

Note: Perform the following steps to configure the programmable RS-232 message waiting indicators interface in a server:

1. Complete an RS-232 Message Waiting Indicators Interface Worksheet.

2. To enable the RS-232 Message Waiting Indicators Interface application and allow for RS-232 cabling, define an RS-232 serial port. See Defining an RS-232 Serial Port.

3. Create the interface string. See Creating a Programmable RS-232 Interface String.

4. Set delay times to allow for PBX processing of RS-232 message waiting indicators requests. See Setting Delay Times for RS-232 Message Waiting Requests.

5. Enable or disable indicator-on requests for successive messages. See Enabling/Disabling Light-on Requests for Successive Messages.

6. If desired, have the number of unplayed messages sent after the directory number when the server issues a request to turn indicators on. See Sending the Number of Unplayed Messages through the Programmable RS-232 Interface.

7. Compensate for different directory number and mailbox numbers, if necessary. See Compensate for Different Directory and Mailbox Numbers.

   - Set the Dept Code As DN parameter in the RS-232 Programmable Menu to Yes.

   - Enter the directory number in the Department Code parameter of the mailbox.

8. Verify that the configuration is correct.

9. Activate the configuration.

10. Assign message waiting type 7 (programmable interface) through the first or second message waiting type prompt in mailboxes that are to receive message waiting indicator requests. See Assigning Message Waiting Indicators to a Mailbox.

11. Test the RS-232 Message Waiting Indicators Interface application.