The new Mediant 1000B chassis based on the incumbent Mediant 1000 chassis is designed to support the Advanced Mezzanine Card (AMC) or AdvancedMC form-factor modules. It provides eight AMC slots (for housing single and mid-sized AMC modules) on its rear panel.

The Mediant 1000B supports both VoIP Gateway and MSBG data routing functionalities by hosting either the CMX or CRMX module respectively. The Mediant 1000B also provides support for the regular Mediant 1000 telephony modules (i.e. FXS FXO and digital PSTN).

The Mediant 1000B chassis supports (optional) the latest OSN server platform - OSN3. The OSN3 provides AMC-based modules offering high performance CPUs targeted for applications requiring high performance processors. The OSN3 can also be provided with dual SATA hard-disk drives (HDD).