Here is a small mini key system digital telephone in use at the host stand at Emmets Brewery in Palatine, IL.
I attended a baptism lunch with my girlfriends family here and the beer and food was excellent!
This is a pretty small telephone but it comes with does some feature buttons. Basically it comes with two line buttons, two intercom buttons and two feature buttons. The display is quite small but it gets the point across.
The Partner system has since been replaced by the Avaya IP Office. The Partner phones will work on the IP Office but many people have instead switched to the various new Avaya IP phone models now available.