Grandstream HT818 8-Port FXS Gateway Router
- 8 FXS ports for analog phones
- 2 SIP profiles
- Gigabit NAT router built in
- 3-way voice conferencing per port
- Fax-over-IP with T.38
- AES encryption, certificate per unit, TR069 provisioning
Last refreshed Sep 23, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
An analog to VoIP gateway that connects a bank of office phones or fax lines to a SIP service. It is a wired voice device with no Wi-Fi, not a home internet router.
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ASIN: B07B6TL7N6Model: HT818Category: Network Routers
Overview
An office manager moving analog desk phones and fax machines to a SIP phone service gets one box that serves a row of handsets. The gateway connects to the network over Ethernet, adds its own NAT router and provisions itself automatically.
Small offices keep their existing analog phones and fax machines while switching to internet calling. It does nothing for Wi-Fi and needs a SIP provider and some network know-how to configure.
Who it's for
Offices, hotels and shops with several analog extensions benefit most. People who need wireless internet or only one phone line should choose something simpler.
Pros and cons
- Serves many analog phones from one box
- Fax over IP support
- Conferencing on each port
- Encryption with a unique certificate
- Needs a SIP service account
- Configuration aimed at technical users
Performance notes
Call quality depends on the network path to the SIP provider, so a congested uplink causes choppy audio. The built-in router handles NAT for the voice traffic, and fax relies on the fax relay support of the provider.
Specifications
| Brand | Grandstream |
|---|---|
| Model | HT818 |
| Dimensions & fit | |
| Item weight | 500 g |
| LAN Port Bandwidth | 1000 Mbps |
| Item Dimensions L x W x H | 5.14 x 3.56 x 1.14 in |
| Power & efficiency | |
| Voltage | 110 volts, 220 voltshigher than 75% of 33 network routers |
| Compatibility & installation | |
| Connectivity Protocol | SIP, T.38, IP |
| Compatible Devices | Analog telephones |
| Warranty & support | |
| Warranty Description | 1 year |
| Other details | |
| Router Network Type | Wired |
| Security Protocol | AES |
| Number of Ports | 8 FXS |
| Sip profiles | 2 |
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Frequently asked questions
How is the Grandstream HT818 set up for many units?
It supports automated and secure provisioning using TR069, aimed at volume deployment and device management.
Does the Grandstream HT818 support fax machines?
Yes, it supports fax-over-IP with the T.38 protocol.
Is the Grandstream HT818 a Wi-Fi router?
No. It is a wired VoIP gateway with FXS ports and a Gigabit NAT router.
How many phone accounts can the HT818 register?
It supports 2 SIP profiles across its 8 FXS ports.