Grandstream HT813 Hybrid ATA – 1 FXS Port, 1 FXO Port

A Hybrid Gateway Combining VoIP and a PSTN Line in One Device — Grandstream HT813

The Grandstream HT813 combines an FXS port for connecting an analog phone or fax with an FXO port for connecting a PSTN line, letting you merge traditional telephony with VoIP while keeping a backup calling path.

Why Choose the HT813?

The HT813 is a flexible solution for small offices and homes that want to run an analog phone on SIP while keeping a landline, with Lifeline, a NAT router and a failover SIP server.

What Does It Offer?

• One FXS port: for an analog phone or fax.


• One FXO port: for a PSTN line.


• 2 SIP profiles: across the FXS and FXO ports.


• Two 10/100Mbps LAN/WAN ports.


• Built-in NAT router.


• Lifeline: connects the analog phone directly to the PSTN line during a power outage.


• 3-way voice conferencing per port.


• Fax over IP: supports T.38.


• Failover SIP Server: automatically switches to the backup server.


• AES, SRTP and TLS security.


• GDMS management and provisioning via TR-069.

Key Technical Specifications

• Model: HT813


• Type: Hybrid ATA


• FXS: 1


• FXO: 1


• SIP profiles: 2


• Network: LAN + WAN at 10/100Mbps


• Lifeline: supported


• Fax over IP: T.38


• Voice conferencing: 3 parties per port


• Operating temperature: 0°C to 40°C

Best Suited For

Homes and small offices that want to use an analog phone with VoIP and a PSTN line at the same time, or keep the landline as a backup path.

Combine VoIP and your landline in one gateway — order the Grandstream HT813 from Catcher.