AudioCodes Mediant 1000B Pre-Configured VoIP Gateway – 4-Span T1/E1, 60 FT1 Channels, Modular Expansion (M1KB-D6)

The AudioCodes Mediant 1000B M1KB-D6 ships pre-configured with four T1/E1 spans providing 60 fractional T1 (FT1) channels — a high-density configuration that delivers enterprise-grade SIP trunking capacity in a single 1U chassis. Open expansion bays provide room for additional modules. The M1KB-D6 is designed for organizations that need 60-channel concurrent capacity pre-configured and ready to deploy, without the additional bays of the M1KB-D3 that come at the cost of span-count efficiency.

The Telecom Spot Take

The 60 FT1 channel configuration occupies a specific niche: organizations that need high concurrent call volume but are deploying within a fractional T1 framework — common in environments where billing or contractual constraints define a sub-full-T1 channel count. Four spans give you the hardware infrastructure for up to full T1 density; the 60-channel FT1 configuration defines the licensed capacity at deployment. Expansion bays allow this chassis to grow if requirements change. IT teams looking for a Mediant 1000B that ships with four spans pre-installed and doesn't require post-delivery module installation will find the M1KB-D6 delivers exactly that.

Key Features

• 4-span T1/E1 pre-installed, 60 FT1 channels: High-density concurrent call capacity ready at deployment — no additional module installation required.
• Modular expansion: Remaining open bays accept additional T1/E1, BRI, or analog voice modules.
• 2 Gigabit Ethernet ports: Dual GE interfaces for SIP connectivity and optional network redundancy.
• SIP, H.323, and MGCP: Full multi-protocol gateway support.
• E-SBC via software license: Session border controller capability on the same hardware.
• T.38 fax relay: Fax over IP across all active channels.
• 1U rack-mountable: Standard 19-inch rack form factor.

Technical Specifications