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Making integrated IP solutions easy and manageable, our HT series of Analog Telephone Adapters are trusted and deployed by some of the largest service providers in the world. Integrate individual analog phones to a home or office environment with these simple to deploy solutions.


  • Supports 3 SIP profiles through 1 FXS port and 4/8 FXO ports
  • High-performance NAT router
  • Lifeline support (FXS port will be hard-relayed to FXO port) in case of a power outage
  • 3-way voice conferencing per port
  • Automated & secure provisioning options using TR069
  • Supports T.38 Fax for reliable Fax-over-IP
  • Failover SIP server automatically switches to secondary server if the main server loses connection
  • Strong AES encryption with security certificate per unit

  • Supports 2 SIP profiles and 8 FXS ports
  • Strong AES encryption with security certificate per unit
  • Automated & secure provisioning options using TR069
  • 3-way voice conferencing per port
  • Exceptional voice quality with wide-band HD codec
  • Supports T.38 Fax for reliable Fax-over-IP
  • Supports dual Gigabit network ports
  • High performance NAT router

  • Supports 2 SIP profiles through 4 FXS ports and dual Gigabit ports
  • Includes a built-in NAT router which can handle routing speeds up to 100MBps
  • TLS and SRTP security encryption technology to protect calls and accounts
  • Automated provisioning options include TR-069 and XML config files
  • Supports 3-way voice conferencing
  • Failover SIP server automatically switches to secondary server if main server loses connection
  • Supports T.38 Fax for creating Fax-over-IP
  • Supports a wide range of caller ID formats
  • Use with Grandstream’s UCM series of IP PBXs for Zero Configuration provisioning

  • Supports 2 SIP profiles through 1 FXS port and 1 FXO port
  • Dual 100Mbps LAN and WAN ports
  • Lifeline support (FXS port will be hard-relayed to FXO port) in case of power outage
  • 3-way voice conferencing per port
  • Automated & secure provisioning options using TR069
  • Supports T.38 Fax for reliable Fax-over-IP
  • Failover SIP server automatically switches to secondary server if main server loses connection
  • Strong AES encryption with security certificate per unit

  • Supports 2 SIP profiles through 2 FXS ports and dual Gigabit ports
  • Includes a built-in NAT router which can handle routing speeds up to 100MBps
  • TLS and SRTP security encryption technology to protect calls and accounts
  • Automated provisioning options include TR-069 and XML config files
  • Supports 3-way voice conferencing
  • Failover SIP server automatically switches to secondary server if main server loses connection
  • Supports T.38 Fax for creating Fax-over-IP
  • Supports a wide range of caller ID formats
  • Use with Grandstream’s UCM series of IP PBXs for Zero Configuration provisioning

  • Supports 2 SIP profiles through 2 FXS ports and a single 10/100Mbps port
  • TLS and SRTP security encryption technology to protect calls and accounts
  • Automated provisioning options include TR-069 and XML config files
  • Supports 3-way voice conferencing
  • Failover SIP server automatically switches to secondary server if main server loses connection
  • Supports T.38 Fax for creating Fax-over-IP
  • Supports a wide range of caller ID formats
  • Use with Grandstream’s UCM series of IP PBXs for Zero Configuration provisioning

  • Supports 1 SIP profile through a single FXS port and a single 10/100Mbps port
  • TLS and SRTP security encryption technology to protect calls and accounts
  • Automated provisioning options include TR-069 and XML config files
  • Supports 3-way voice conferencing
  • Failover SIP server automatically switches to secondary server if main server loses connection
  • Supports T.38 Fax for creating Fax-over-IP
  • Supports a wide range of caller ID formats
  • Use with Grandstream’s UCM series of IP PBXs for Zero Configuration provisioning
  • Supports advanced telephony features, including call transfer, call forward, call-waiting, do not disturb, message waiting indication, multilanguage prompts, flexible dial plan and more