Supports 12 Expansion Modules providing a combination of up to 360 analog, digital, and IP telephones, with capacity for 8 analog trunks or 4 digital trunks (96 T1/PRI channels or 120 E1 channels). Optionally, SIP trunks are also supported. Additional analog trunks can be provisioned using the IP400 Analog Trunk 16 module. Features include 2 independently switched LAN ports and optional support for up to 60 voice compression channels.