Extra handset and recharge cradle with call-waiting caller id for use with models 21018, 21028 and 21098
Xplus100 digital extension
Infrontia isdn business communication system full extension
Nec infrontia isdn business communication system quick extension
Dual-in-handset extension telephone
Mobile extension
Hotel room extension for smart communication server
2-9120 series corded extension phone
Mobile extension