If by “mass notification” you mean “voice evacuation”, yes: the MS-9200UDLS does not have built-in voice capability, meaning you’d have to connect a separate voice panel (such as Fire-Lite’s current ECC-50/100) to it to enable such (you’d also probably have to connect several relay modules to the 9200 to allow it to trip each tone &/or message on the voice panel since I don’t think it has enough relays by default to do so).