IP Small Office Edition
IP Small Office supports up to 28 extensions, 4 Analog, 8 Digital and 16 IP.
IP Office IP412 Release 3.2
IP412 Office supports up to 180 extensions, 208 analog trunks and 96 digital trunks.
IP Office IP500 Base Station (700417207)
IP500 has a greater VCM channel capacity and better performance, the IP Office 500 is the most suitable of the IP Office range for IP Telephony.
IP406 Office 3.2 ( Version 2 )
IP406 Office supports up to 180 extensions, 104 analog trunks and 48 digital trunks.