General
Number of FXS ports	2
SIP profiles	2
Ethernet port	10/100 Mbps
Security encryption	TLS, SRTP
Automated provisioning	TR-069, XML configuration files
Audio conferences	3-way
Fax transmission	T.38
Compatibility	Grandstream UCM series IP-PBX
Failover SIP server

The Grandstream SIP-ATA HandyTone HT802 is a network adapter for VoIP applications, connecting two analog telephone lines (FXS ports) to an IP network. The device enables the use of analog telephones in an IP-based communications environment, for example in combination with IP-PBX systems or VoIP services. It is designed for use in small to medium office environments as well as home applications, where a cost-effective migration from analog to IP telephone systems is required.

SIP Technology and Network Integration
The HT802 supports two SIP profiles, each of which can be activated via one of the two FXS ports. This allows simultaneous use of two analog endpoints in the IP network. Communication takes place via a single 10/100 Mbps Ethernet port, which establishes the connection to the local network. SIP technology ensures signaling and control of telephone connections over IP networks, enabling integration into existing VoIP infrastructures.

Security Features
The device integrates security protocols such as TLS (Transport Layer Security) and SRTP (Secure Real-time Transport Protocol) to encrypt call transmission and authentication data. These technologies protect communication against eavesdropping and unauthorized access, which is particularly important in business environments. Encryption occurs at the protocol and transport level to ensure comprehensive data security.

Automated Configuration and Management
The HT802 offers support for automated provisioning options, including TR-069 and XML configuration files. These features enable centralized and standardized configuration of the device, making setup and maintenance more efficient in larger networks. Especially when used with Grandstream UCM series IP-PBX systems, Zero Configuration Provisioning is possible, eliminating the need for manual device configuration.

Features and Specifications in Detail
The device supports 3-way audio conferencing, allowing multiple participants to be connected simultaneously in a telephone conference. This is useful for small meetings or internal communication. Additionally, T.38 fax transmission is supported, enabling fax transmission over IP networks (Fax-over-IP). Support for various caller ID formats ensures compatibility with different VoIP services and providers.

Failover Function and Reliability
An integrated failover system for SIP servers ensures that in the event of a primary SIP server failure, the device automatically switches to a secondary server. This increases call availability and minimizes operational interruptions. The function is particularly relevant for users requiring high operational reliability.

Compatibility and Accessories
The HT802 is specifically designed for use with Grandstream UCM series IP-PBX systems, enabling Zero Configuration Provisioning. Compatibility with these systems simplifies integration into existing infrastructures.

Mounting and Installation
Installation is performed via network port connectivity and the two FXS ports. Configuration can be done via supported protocols (TR-069, XML) or manually through a web interface. The exact procedure depends on the IP-PBX platform used and network settings.

Operational Advantages
The combination of two FXS ports, SIP support, automated configuration, and security features makes the HT802 a flexible solution for integrating analog telephones into IP networks. The failover function and support for Fax-over-IP enhance functionality and reliability. Use with Grandstream UCM systems enables seamless integration without manual settings.