Not only do traditional telephones work with VoIP but you also have the option of using newer next-generation VoIP optimized telephone hardware we can provide you, or software based phones [called "soft phones"] installed onto your computer. VoIP Connect trunk line replacement fully supports most all industry-leading PBX phone systems from Toshiba, Avaya and Nortel - recommended next-generation hardware is available for lease [prevents obsolescence] and purchase.