' TalkIP System Model Unit Price IP Phone 650 (1 Year Warranty)      6 up to 48 lines      up to 3 optional Expansion Sidecars      Description   Technical Specs $312.99   IP Phone 650 (3 Year Warranty) $337.98 IP Phone 650es - Expansion Sidecar (1 Year Warranty)      14 line Expansion Sidecar      Description   Technical Specs $165.99