Click Fraud Grandstream HT813 Analog Telephone Adapter
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Grandstream HT813 Analog Telephone Adapter

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01/11/2021 £65.00 exc. VAT
78.00 inc. VAT
Availability:In stock for next day delivery
Key Features
  • Supports 2 SIP profiles
  • Dual 100Mbps LAN and WAN ports
  • 3-way voice conferencing per port

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Grandstream HT813 Analog Telephone Adapter

The Grandstream HT813 Analog Telephone Adapter features 1 analog telephone FXS port and 1 PSTN line FXO port in order to offer backup lifeline support using a PSTN line. The integration of an FXO and FXS port enables this hybrid ATA to support remote calling to and from the PSTN line. For added flexibility, the FXS port extends VoIP service to one analog device.

Grandstream HT813 Analog Telephone Adapter Key Features

  • 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

For added flexibility, the FXS port extends VoIP service to one analog device. Users can convert their analog technology to VoIP thanks to the HT813’s 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.

snom d385 VoIP Phone Technical Specification


  • Telephone Interfaces: One (1) RJ11 FXS port, One (1) RJ11 FXO PSTN line port with lifeline support
  • Network Interface: Two (2) 10/100Mbps ports (RJ45) with integrated NAT router
  • LED Indicators: POWER, LAN, WAN, FXS, FXO
  • Factory Reset Button Yes

Voice, Fax, Modem

  • Telephony Features: Caller ID display or block, call waiting, flash, blind or attended transfer, forward, hold, do not disturb, 3-way conference
  • Voice Codecs: G.711 with Annex I (PLC) and Annex II (VAD/CNG), G.723.1, G.729A/B, G.726, iLBC, OPUS, dynamic jitter buffer, advanced line echo cancellation
  • Fax over IP: T.38 compliant Group 3 Fax Relay up to 14.4kpbs and auto-switch to G.711 for Fax Pass-through
  • Short/Long Haul Ring Load: 3 REN: Up to 1km on 24 AWG
  • Caller ID: Bellcore Type 1 & 2, ETSI, BT, NTT, and DTMF-based CID
  • Disconnect Methods: Busy Tone, Polarity Reversal/Wink, Loop Current


  • QoS: Layer 2 (802.1Q VLAN, SIP/RTP 802.1p) and Layer 3 (ToS, Diffserv, MPLS)
  • DTMF Method: In-audio, RFC2833 and/or SIP INFO
  • Provisioning and Control: HTTP, HTTPS, TFTP, SSH, TR-069, secure and automated provisioning using AES encryption, syslog


  • Media: SRTP
  • Control: TLS/SIPS/HTTPS
  • Management: Syslog support, telnet, SSH, remote management using web browser


  • Universal Power Supply: Input: 100-240VAC, 50-60Hz Output: 12V/0.5A
  • Environmental: Operational: 32º – 104ºF or 0º – 40ºC, Storage: 14º – 140ºF or -10º – 60ºC, Humidity: 10 – 90% Non-condensing
  • Dimension and Weight 130.5 x 90.5 x 29 mm (L x W x D)
  • Weight: 0.142Kg



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