Grandstream HT813 Hybrid ATA – FXS & FXO Ports VoIP Gateway with PSTN Backup & SIP Support

Description

The Grandstream HT813 Hybrid ATA (Analog Telephone Adapter) from Grandstream Networks is a powerful and compact telephony gateway designed to bridge traditional analog telephony with modern VoIP networks. It is widely used in SMBs, service provider deployments, and hybrid communication environments.

The device includes one FXS port and one FXO port, allowing it to connect both an analog telephone and a PSTN line simultaneously. This unique design enables bi-directional communication between VoIP and traditional telephone networks, making it a flexible solution for businesses transitioning to IP telephony.

With SIP support for up to 2 SIP profiles, the HT813 allows integration with most IP PBX systems, including cloud-based and on-premise solutions. It also supports lifeline functionality, ensuring that in case of power failure, the PSTN line is directly connected to maintain emergency calling capability.

The HT813 delivers reliable voice performance with support for multiple codecs including G.711, G.729, and OPUS, ensuring high-quality audio even in low-bandwidth conditions. It also supports T.38 fax over IP, making it suitable for businesses that still rely on fax communication.

Security is a strong focus, with support for TLS, SRTP encryption, secure provisioning, and AES-based configuration protection, ensuring safe communication across VoIP networks. It also includes failover SIP server support, automatically switching to a backup server if the primary connection fails.

The device features dual 10/100 Mbps network ports with integrated NAT router capabilities, allowing simple deployment in office networks without requiring additional routing hardware.

Advanced telephony features include 3-way conferencing, call forwarding, call waiting, caller ID, and flexible dial plans, making it suitable for both residential and enterprise environments.

The Grandstream HT813 ATA is an ideal solution for organizations that need to integrate legacy analog lines with modern VoIP systems while maintaining reliability, security, and flexibility in communication infrastructure.