Connect any BST phones to their appropriate BST ports. These phones do not need to load additional firmware.
The IP500 DS16B and DS30B external expansion modules support either BST or DS ports. The port type for a whole module is configured using IP Office Manager. See DS16B/30B Port Mode Selection.
For system's with BST phone ports, when a phone is first connected to the port, the button programming of the associated user is overwritten with the default button programming appropriate for the phone model.