AudioCodes Mediant 1000B Pre-Configured VoIP Gateway – Fractional T1/E1, 15 VoIP Channels, 5 Expansion Bays (M1KB-D4)

The AudioCodes Mediant 1000B M1KB-D4 ships pre-configured with a fractional T1/E1 span, providing 15 simultaneous VoIP channels — the right starting capacity for smaller organizations that need the modular Mediant 1000B platform but aren't ready to commit to a full T1 span from day one. Five expansion bays remain open for future modules. The chassis, dual GE ports, and enterprise gateway software are all fully in place; only the span count is scaled to match a lower initial call volume.

The Telecom Spot Take

A fractional T1/E1 configuration makes economic sense when your actual concurrent call volume is well below 23 channels but you need the enterprise chassis, modular expandability, and professional management capabilities that the Mediant 1000B provides. Organizations with 15 or fewer simultaneous calls who plan to scale as their business grows — and want to avoid replacing hardware when that growth happens — will find the M1KB-D4 a smart entry point. The five open expansion bays mean adding a full T1 span module or analog ports later is a simple field upgrade, not a platform migration.

Key Features

• Fractional T1/E1 pre-installed: 15 simultaneous VoIP channels — right-sized capacity for smaller deployments using the Mediant 1000B platform.
• 5 open expansion bays: Scale to full T1/E1 spans, BRI, or analog modules as call volume grows, without replacing the chassis.
• 2 Gigabit Ethernet ports: Dual GE interfaces for SIP connectivity and optional network redundancy.
• SIP, H.323, and MGCP: Full multi-protocol support for compatibility with any VoIP platform.
• E-SBC capable via software license: Upgrade to session border controller functionality on the same hardware.
• 1U rack-mountable: Enterprise-grade chassis ready for rack deployment from day one.

Technical Specifications