Phoenix class (advanced escort)

The Phoenix-class was a type of Federation advanced escort starship in Starfleet service in the early 25th century, a subclass of the design. These vessels were usually commanded by an officer holding the rank of one-star rear admiral or higher. An enhanced version, the fleet advanced escort, was available for vice admirals. 

History and specifications
The Phoenix-class was an escort, i.e. a Starfleet warship. Phaser cannons were standard equipment on these ships. The saucer, nacelles, pylons and hull were interchangeable with -, - and starships. Compared to its mother class, the Phoenix looked stubbier than the Prometheus, and its nacelles were shorter. 

Known vessels

 * USS Phoenix (NX-95560) (NX-95560)