Based on this product's specifications, here are some alternatives and similar models
Session Border Controller AUDIOCODES Mediant 800C ESBC for Voice-over-IP — SBC sessions support
Summary description:
AUDIOCODES Mediant 800C ESBC is a Session Border Controller designed for Voice-over-IP environments. It provides session border control for SBC sessions, enabling secure SIP trunking, interconnection between networks and protection of VoIP signaling and media. Suitable for service providers and enterprise edge deployments to manage SIP sessions, interoperability and connectivity.