7 Switch Positions - A to G
A - Most Standard Telephones: Sangoma, NEC, Polycom, Panasonic, 3Com, Aastra, Escene, Fanvil
B - Cisco IP Telephones
C - Ascom and Phillips Telephones
D - Yealink, Avaya, HuaWei, Snom, Akuvox, Grandstream IP Telephones
E - Yealink, Avaya, HuaWei, Snom, Akuvox, Grandstream IP Telephones
F - Most Standard Telephones: Sangoma, NEC, Polycom, Panasonic, 3Com, Aastra, Escene, Fanvil
G - Avaya Callmaster V and VI, Cisco IP Phones