AudioCodes Mediant 1000B Quad-Span T1/E1 Voice Module – 4-Span Digital Gateway Expansion Card for Mediant 1000B (M1KB-VM-4SPAN)

The AudioCodes M1KB-VM-4SPAN is the highest-density T1/E1 voice module for the Mediant 1000B modular VoIP gateway. It delivers four independent T1 or E1 interfaces in a single module bay — up to 96 simultaneous voice channels on T1 or 120 on E1 — making it the right choice for large enterprise, contact center, or carrier-grade deployments with high TDM trunk capacity requirements.

The Telecom Spot Take

Four T1 or E1 spans in a single module slot is maximum density for Mediant 1000B TDM capacity. For large contact centers bridging multiple PRI circuits to SIP, enterprise campuses with high PSTN traffic, or service providers running TDM-SIP interconnect at scale, the M1KB-VM-4SPAN minimizes module bay consumption while delivering 96 (T1) or 120 (E1) simultaneous voice paths. When a deployment needs more span capacity than two modules provide, filling bays with quad-span cards is the most efficient approach. This is the workhorse module for Mediant 1000B deployments where TDM capacity is the primary design driver.

Key Features

• Quad T1/E1 spans — maximum TDM density: 96 DS0 channels (T1) or 120 DS0 channels (E1)
• Four interfaces in one module bay — most efficient use of Mediant 1000B expansion slots
• Large-scale TDM-to-SIP bridging — ideal for high-volume contact centers and enterprise PSTN gateways
• Supports concurrent multi-trunk configurations — connects multiple active PRI or T1/E1 circuits simultaneously
• OEM Mediant 1000B module — factory-validated for the Mediant 1000B voice module bay

Technical Specifications