Grandstream HT813 2-Port FXS/FXO with NAT Router Analog Telephone Adapter (ATA)

: In stock

: Grandstream

Regular price $64.99


The Grandstream HT813 is an advanced 2-port analog telephone adapter (ATA) with 1 FXS port and 1 PSTN FXO port and an integrated Gigabit NAT router. It offers a backup lifeline support using a PSTN line. Users can convert their analog devices to VoIP networks in residential or office environments. The HT813 features an ultra-compact size, HD voice quality, advanced VoIP functionality, high-end security protection and multiple auto provisioning options. These advanced features also allow service providers to offer high quality IP service to customers looking to upgrade to VoIP.



·       Supports 2 SIP profiles through 1 FXS port and 1 FXO port

·       Dual 10/100 Ethernet ports

·       LED Indicators (Power, LAN, WAN, FXS, FXO)

·       Integrated high-performance NAT router

·       Lifeline support (FXS port will be hard-relayed to FXO port) in case of power outage

·       Strong AES encryption with security certificate per unit

·       Automated provisioning options include TR-069 and XML config files

·       Supports 3-way voice conferencing

·       Exceptional voice quality with wideband HD codec

·       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

·       HTTP, HTTPS, SSH, TFTP, TR-069, secure and automated provisioning using AES encryption, syslog



·       Can be used with a variety of SIP compatible hosted service providers and SIP compatible IP PBX systems

·       Check with your hosted provider or IP PBX documentation to confirm system compatibility


Package Contents

·       HT813 ATA

·       12V power supply




We provide FREE UPS Ground shipping on any online order over $99.  For online orders totaling less than $99, UPS Ground shipping is only $9.95.  The offer is valid in the continental United States.

The vast majority of our orders are shipped the same day as placed.  If there is any significant delay in your order leaving our warehouse, you will be contacted promptly by our customer service department.

We offer UPS Ground, UPS 3 Day Select, UPS 2 Day Air, UPS Next Day Air Saver, and UPS Next Day Air.


·           UPS Ground - 1-5 days depending on delivery distance (see Ground services map below)

·           UPS 3 Day Select – by 4:30 p.m. third business day to most US addresses

·           UPS 2 Day Air - by 4:30 p.m. second business day to most US addresses

·           UPS Next Day Air Saver - by 4:30 p.m. next business day to most US addresses

·           UPS Next Day Air - by 10:00 a.m. next business day to most US addresses



UPS Ground Services Map