Asterisk compatible handsets and guides to configuration:
Cisco 79XX, SPA 504*, 525*
Mitel 5055, 5215, 5220
Shoretel 210
Siemens LP5100, Optipoint 100/300
Snom 300, 320, 360, 370, 710, 720, 760, 820, 870
* = Guide currently unavailable
* = Guide currently unavailable