AudioCodes Mediant 500 E-SBC - VoIP-gateway - GigE

Handle up to 250 concurrent SIP sessions with hardware-accelerated transcoding and a hardened security stack—all in a compact desktop or half-rack chassis. The Mediant 500 E-SBC combines enterprise session border control with a VoIP gateway, delivering carrier-grade voice quality and protection for unified communications deployments.

Overview

The AudioCodes Mediant 500 E-SBC is a versatile enterprise session border controller and VoIP gateway engineered for small to medium businesses and branch offices. It provides secure SIP trunking, NAT traversal, and interoperability between disparate VoIP networks. With dual Gigabit Ethernet ports, it ensures high availability and flexible network topologies. The device supports a broad range of voice codecs, including Opus and SILK, and offers transcoding to bridge codec mismatches. Its stateful firewall, DoS/DDoS protection, and TLS/SRTP encryption safeguard voice traffic. Management is simplified via web GUI, CLI, or SNMP, and an external AC adapter keeps the unit cool and quiet.

What stands out

• Supports up to 250 concurrent SBC sessions or VoIP gateway calls
• Dual 10/100/1000Base-T Gigabit Ethernet ports for redundancy and segmentation
• Comprehensive security: SIP TLS, SRTP, stateful firewall, DoS/DDoS protection, NAT traversal
• Wide codec support including G.711, G.729, G.723.1, G.722, Opus, and SILK with transcoding
• Fax support via T.38 and G.711 pass-through
• High availability with active/standby software-based failover
• Desktop or half-width 1U rackmount form factor (rack kit optional)
• G.168 echo cancellation and advanced voice quality features (jitter buffer, PLC, VAD, CNG)

Technical details

• Product Type: Enterprise Session Border Controller (E-SBC) / VoIP Gateway
• Concurrent Sessions (E-SBC): Up to 250
• Concurrent Calls (VoIP Gateway): Up to 250
• Network Interfaces: 2 x 10/100/1000Base-T Gigabit Ethernet
• Signaling Protocols: SIP, SIP over TLS
• Media Protocols: RTP, SRTP
• Voice Codecs: G.711, G.729, G.723.1, G.722, OPUS, SILK
• Fax Support: T.38, G.711 pass-through
• Security: Stateful Firewall, DoS/DDoS Protection, NAT Traversal, SIP TLS, SRTP
• Management: Web GUI, CLI, SNMP
• Transcoding: Yes (G.711, G.729, G.723.1, G.722, OPUS, SILK)
• High Availability: Active/Standby (software-based)
• Power Supply: External AC/DC Adapter
• Operating Temperature: 0°C to 40°C (32°F to 104°F)
• Echo Cancellation: G.168
• Voice Quality: Jitter Buffer, Packet Loss Concealment, VAD, CNG

Our verdict

The Mediant 500 E-SBC delivers enterprise-grade security and voice quality in a compact, cost-effective package. Its robust codec support and transcoding make it ideal for mixed environments, while the dual Gigabit ports and high availability ensure reliable connectivity. A solid choice for SMBs and branch offices seeking a secure VoIP edge.