1.2.1 Station Connectivity

The key functionality of the modular station interface (MSI) software is station connectivity, which includes the following features:

• detecting when a station goes on-hook, off-hook, or hookflash
• ringing phones with standard or distinctive rings
• ringing phones and sending frequency shift keyed (FSK) data (DM3 boards only)
• providing zip tone (MSI boards only)

Note: The MSI software is not capable of taking a station on-hook or off-hook. Instead, the MSI software reports what has happened on the channel or rings the phone.

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