Skip to product information
1 of 3


Grandstream HT813 2 Port VoIP Analogue Telephone Adaptor

Grandstream HT813 2 Port VoIP Analogue Telephone Adaptor

Regular price £90.30 GBP
Regular price Sale price £90.30 GBP
Sale Sold out
Tax included. Shipping calculated at checkout.
The HT813 is a powerful analog telephone adapter designed for users looking to connect their analog devices to a VoIP network in either a home or office. It features 1 analog telephone FXS port and 1 PSTN line FXO port in order to offer backup lifeline support using a PSTN line. The FXS port extends VoIP service to one analog device thanks to the HT813's compact size, HD voice quality and multi auto provisioning options.

The HT813 is an easy-to-use analog telephone adapter (ATA) with 1 FXS port and 1 FXO port. Built upon Grandstream’s market-leading SIP ATA/gateway technology with millions of units successfully deployed worldwide, this powerful ATA features exceptional voice quality in various application environments, strong encryption with unique security certificate per unit, automated provisioning for volume deployment and device management, and outstanding network performance for home and office use. The HT813 delivers outstanding VoIP technology with 3-way voice conferencing per port to home and office environments and allows users to successfully connect their analog devices to a manageable and powerful VoIP network.

Key Highlights

  • 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
  • Supports 3-way voice conferencing
  • Automated & secure provisioning options
  • Supports T.38 Fax for creating Fax-over-IP
  • Failover SIP server automatically switches to secondary server if main server loses connection
  • Use with Grandstream’s UCM series of IP PBXs for Zero Configuration provisioning
  • Strong AES encryption with security certificate per unit

What's in the box

HT813 Telephone Adapter UK Power Adapter Ethernet Cable Quick Installation Guide GPL Statement

Shipping & Returns

Next business day shipping available.

Returns accepted on this product. Please read our Returns Policy for details.

View full details
  • Next day shipping as standard*

    *On orders placed before 12pm

  • Returns accepted*

    *Please read our returns policy for details.