"The modular Mediant 1000 connects IP-PBXs to any SIP trunking service provider, scaling to 150 concurrent sessions. It offers superior performance in connecting any SIP to SIP environments, legacy TDM-based PBX systems to IP networks, and IP-PBXs to the PSTN."
Item Description:Mediant 1000B with a single E1/T1 interf - M1KB-D1-2AC
Mediant 1000B with a single E1/T1 interface and dual AC power supplies - M1KB-D1-2AC
Image, Data Sheet & Marketing Description may differ from the actual product of part# M1KB-D1-2AC