"The Mediant 800 connects IP-PBXs to any SIP trunking service provider, scaling to 250 concurrent sessions. It offers superior performance in connecting any SIP to SIP environment, legacy TDM-based PBX systems to IP networks, and IP-PBXs to the PSTN."
Item Description:Mediant 800C MSBR with 2 E1/T1, 4 FXS an - M800C-2ET4S
Supports dual power supply (optional AC/DC power adapter must be ordered separately). Software upgradable to 4 E1/T1. - M800C-2ET4S
Image, Data Sheet & Marketing Description may differ from the actual product of part# M800C-2ET4S