AudioCodes Mediant 500L - VoIP-gateway - ISDN, 100Mb LAN

Handle up to 60 concurrent calls with carrier-grade echo cancellation and T.38 fax relay in a compact desktop form factor. The AudioCodes Mediant 500L is an enterprise session border controller and media gateway built for SMEs and branch offices that need to bridge ISDN PRI lines with modern SIP trunks.

Overview

The Mediant 500L combines a VoIP gateway and SBC in one unit, offering flexible connectivity for legacy telephony and cloud PBX environments. It supports up to 2 E1/T1/J1 ISDN interfaces, 2 Gigabit Ethernet ports, and a wide range of voice codecs including Opus for HD voice. With integrated security features like SRTP, TLS, and a SIP firewall, it ensures safe and reliable voice communications.

What stands out

• Up to 60 concurrent gateway calls or 100 SBC sessions
• Dual E1/T1/J1 ISDN ports with PRI, R2, and optional SS7 signaling
• Comprehensive security: SRTP, TLS, DoS/DDoS protection, access control
• G.168-2004 echo cancellation and T.38 fax support for clear voice and reliable fax
• Flexible management via web GUI, CLI, SNMP, and Syslog

Technical details

• VoIP protocols: SIP, H.323, MGCP
• Voice codecs: G.711, G.729A/B, G.723.1, G.722, Opus (optional)
• Ethernet: 2 x 10/100/1000Base-T Gigabit Ethernet
• Concurrent calls: up to 60 (gateway) / 100 (SBC)
• Transcoding channels: up to 60
• Management: Web GUI, CLI, SNMP, Syslog
• Power: internal AC 100-240V
• Operating temperature: 0°C to 40°C
• Form factor: desktop, 1U rackmount with optional kit

Our verdict

A robust and secure gateway that seamlessly connects legacy ISDN infrastructure to modern VoIP networks, ideal for businesses transitioning to cloud communications.