Grandstream HT813 Hybrid ATA with 1 FXS and 1 FXO Port

Grandstream HT813 – VoIP and Landline in One Device

The Grandstream HT813 is a hybrid ATA that combines an FXS port for an analog phone or fax and an FXO port for a PSTN landline, letting you integrate traditional calling with VoIP while keeping a backup path.

Key Features

• 1 FXS port for an analog phone or fax.
• 1 FXO port for a PSTN line.
• 2 SIP profiles across the FXS and FXO ports.
• LAN/WAN ports at 10/100Mbps.
• Built-in NAT router.
• Lifeline – connects the phone directly to the landline during power failure.
• 3-way voice conferencing per port.
• Fax over IP with T.38.
• Failover SIP server.
• AES, SRTP and TLS security with GDMS and TR-069 management.

Technical Specifications

• Model: HT813
• Type: Hybrid FXS/FXO ATA
• FXS ports: 1
• FXO ports: 1
• SIP profiles: 2
• Network: LAN + WAN 10/100Mbps
• Lifeline: supported
• Fax: T.38
• Operating temperature: 0–40°C

Ideal For

Homes and small offices that want to use an analog phone on VoIP while keeping a landline as a backup or extra line.

Frequently Asked Questions

Why is the HT813 called hybrid?
It has both an FXS port for a phone and an FXO port for a landline in one unit.

Can landline calls be routed to an IP PBX?
Yes, the FXO port lets you route landline calls to your PBX or SIP service.

What happens during a power outage?
With Lifeline the phone connects straight to the landline and keeps working.

Order the Grandstream HT813 from Modn Plus with warranty and fast shipping across Saudi Arabia.