Locution is planned to be implemented systemwide from what I gather for the Metro P25 AKA the base for the future Central TN RTRS, which then will become an big TACN cell. Even for smaller agencies, it is beneficial. Especially if there are future plans for consolidation of dispatch centers, which is the trend nationwide. Expect implementation in Sumner County once they get the new ECC online, and go over to TACN.
Locution has been used in Central NC for many years...both Wake & Durham Counties use it for FD & EMS alerting.....I now actually prefer it as it is the same voice everytime with little chance for confusion.