We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Small rectangular white VoIP gateway with five status LEDs and four ports on the front

Grandstream

Grandstream HT813 VoIP gateway 1 FXS 1 FXO 2 RJ-45

SKU CH-CY1D-3VKN6 MPN HT813

Connects one analogue phone and one PSTN line to VoIP with dual 100 Mbps ports and lifeline failover

  • Port countTelephone Interfaces: 1 x RJ11 FXS port, One (1) RJ11 FXO PS
  • Supported protocolsTCP / IP / UDP, RTP / RTCP, HTTP / HTTPS, ARP / RARP, ICMP,
  • Security featuresMedia: SRTP Control: TLS / SIPS / HTTPS Management: Syslog s
  • Indicator lightsPOWER, LAN, WAN, FXS, FXO
  • Power detailsInput: 100-240 V AC, 50-60 Hz Output: 12 V / 0.5A
  • Temperature rangeOperating Temperature: 0 to 40 degree Celsius (32 to 104 deg
  • Hybrid FXS and FXO ports enable PSTN backup calling
  • Dual 10/100 Mbps RJ45 ports with integrated NAT router
  • Lifeline support keeps FXS linked to FXO during power loss
  • 3-way voice conferencing on each port for group calls
  • Compact 1.14 x 5.14 x 3.56 inch design fits tight spaces

What it is and who it is for

The Grandstream HT813 is a compact VoIP gateway that connects one analogue telephone and one PSTN line to an IP network. It suits small offices or home users who want to keep existing handsets while moving calls onto a SIP trunk. Buyers needing more than one analogue extension or multiple PSTN lines should look elsewhere.

Port count and lifeline

The unit provides a single RJ11 FXS port for a telephone and one RJ11 FXO port for the PSTN line, with lifeline relay that hard-wires the FXS port to the FXO port during a power outage. This combination decides whether the gateway matches the line and handset count you have.

Installation and common issues

Two 10/100 Mbps RJ45 ports with a built-in NAT router let the device sit between the LAN and the WAN without extra hardware. Configuration is done through a web browser, telnet, SSH or TR-069 auto-provisioning. The most frequent problem is mismatched SIP credentials or firewall rules blocking the required signalling ports.

How it compares

Measured against everything we stock in IP Phones & VoIP Handsets, at today’s prices. Recalculated every night.

Price $73.99
Cheaper than about 73% of the 495 comparable items (median $138.99).

Specifications

Product
Brand nameGrandstream
Model nameHT813
Product typeAccessories
Connectivity
Supported protocolsTCP / IP / UDP, RTP / RTCP, HTTP / HTTPS, ARP / RARP, ICMP, DNS, DHCP, NTP,
TFTP, TELNET, STUN, SIP (RFC3261), SIP over TCP / TLS, SRTP, TR-069
Ports & slots
Port countTelephone Interfaces: 1 x RJ11 FXS port, One (1) RJ11 FXO PSTN line port with lifeline support
Network Interface: 2 × 10/100 Mbit/s ports (RJ45) with integrated NAT router
Power
Power detailsInput: 100-240 V AC, 50-60 Hz
Output: 12 V / 0.5A
Size & build
Product dimensions1.14 in × 5.14 in × 3.56 in
Product weight0.31 lb (0.14 kg)
Shipping weight0.91 kg
Package size305 × 229 × 110 mm
Environment & compliance
Temperature rangeOperating Temperature: 0 to 40 degree Celsius (32 to 104 degree Fahrenheit)
Storage Temperature: -10 to -60 degree Celsius (14 to 140 degree Fahrenheit)
Humidity range10% to 90%, Non-Condensing
More details
Security featuresMedia: SRTP
Control: TLS / SIPS / HTTPS
Management: Syslog support, telnet, SSH, remote management using web browser
Indicator lightsPOWER, LAN, WAN, FXS, FXO

Questions about this item

What does the single FXS port actually let me connect?

It connects one analogue telephone or fax machine so it can place and receive calls over the VoIP service configured on the gateway.

The box lists two 10/100 Mbps RJ-45 ports — what does that cap at in practice?

Each port negotiates at 10 or 100 Mbps full-duplex, so the wired link to your router or switch will not exceed 100 Mbps throughput.

How much space does the 1.14 x 5.14 x 3.56 inch chassis need on a shelf or wall?

It occupies a footprint of roughly 5.14 by 3.56 inches and stands 1.14 inches tall, weighing 0.31 lb, so it fits on a narrow shelf or can be mounted with standard brackets.

More in IP Phones & VoIP Handsets

Similar items