# VoIP telephone adapter Grandstream HT818

**URL:** https://aio.lv/en/product--grandstream-ht818--1037949
**Data updated:** 2025-12-29 05:32 (EET)
**Category:** VoIP Gateways
**Manufacturer:** Grandstream
**Manufacturer code:** HT818
**EAN:** 6947273702412
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 129.49 €
**Prices and availability valid until:** 2026-07-18 23:59
**Price without VAT (21%):** 107.02 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--grandstream-ht818--1037949

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 08.07.2026 | free |
| Pickup points | 13.07.2026 | 1.99 EUR |
| Courier delivery to door | 13.07.2026 | 4.99 EUR |

## Summary description

The Grandstream HT818 VoIP telephone adapter supports multiple voice codecs including G.711, G.723.1, G.726, G.729A, G.729B, OPUS, and iLBC. It features fax compatibility with T.38 and offers LED indicators for LAN, Power, and WAN. With ADSL xDSL connection type, it supports various network protocols such as TCP/IP/UDP, RTP/RTCP, and more. Security is ensured with AES, HTTPS, SIPS, and SSL/TLS. Compact dimensions of 120 x 180 x 36 mm and a weight of 356 g make it a versatile choice for VoIP solutions.

## Long description

The Grandstream HT818 VoIP telephone adapter is an 8-port analog-to-VoIP gateway with 8 FXS ports and an integrated Gigabit NAT router. Designed for deployments that require reliable analog phone integration with SIP-based services, the HT818 supports multiple codecs (including G.711, G.723.1, G.726, G.729A/B, OPUS, iLBC), T.38 fax over IP, and provides LED indicators for LAN, Power and WAN. Its compact form factor and support for dual Gigabit network ports make it suitable for small offices and branch locations that need secure, high-quality voice services.
Advantages
The HT818 delivers wide-band HD voice quality, support for 3-way conferencing per port, and robust security including AES encryption and a unique security certificate per unit. It offers automated and secure provisioning (TR-069) and dual Gigabit ports for concurrent WAN/LAN connections, while its integrated NAT router improves network performance for enterprise deployments.
Suitable for
 Small offices and branch sites integrating analog phones with VoIP networks
 Service providers deploying multiple units with automated provisioning
 Locations requiring reliable Fax-over-IP (T.38) support
 Environments needing secure voice connections with AES and TLS/SIPS
Key specifications
 Model: Grandstream HT818 (MPN: HT818, EAN: 6947273702412)
 Ports: 8 FXS ports
 Network: Dual Gigabit Ethernet ports, integrated NAT router
 Codecs: G.711, G.723.1, G.726, G.729A/B, OPUS, iLBC
 Fax: T.38 Fax support
 Security: AES encryption, HTTPS, SIPS, SSL/TLS, unique device certificate
 Provisioning: TR-069 automated secure provisioning
 Other: 3-way conferencing per port, LED indicators for LAN/Power/WAN
 Dimensions & weight: 120 x 180 x 36 mm, 356 g
How to use
Physically connect analog telephones to the HT818’s FXS ports and link the device to your network using the Gigabit Ethernet ports. Configure SIP account credentials and network settings via the web management interface or use TR-069/auto-provisioning for centralized deployment. Ensure codecs and fax (T.38) settings match the requirements of your PBX or service provider, and verify LED indicators to confirm LAN, WAN and power status.
Usage recommendations
For optimal voice quality and reliability, place the HT818 behind a properly configured firewall and enable hardware NAT. Use secure provisioning and TLS/SIPS for SIP signaling and AES for media encryption. When deploying multiple units, employ TR-069 provisioning and unique certificates to maintain centralized management and device-level security.

## Specifications

| Feature | Value |
|---|---|
| Dimensions (WxDxH) | 120 x 180 x 36 |
| Weight | 0.356 kg |
| Certification | FCC/CE/RCM |
| Security algorithms | SSL/TLS, SIPS, HTTPS, AES |
| Supported network protocols | TCP/IP/UDP, RTP/RTCP, HTTP/HTTPS, ARP/RARP, ICMP, DNS, DHCP, NTP, TFTP, TELNET, STUN, SIP (RFC3261), SIP TCP/TLS, SRTP, TR-069 |
| Operating relative humidity (H-H) | 10 - 90 |
| Storage temperature (T-T) | -10 - 60 |
| Operating temperature (T-T) | 0 - 40 |
| LED indicators | WAN, Power, LAN |
| Conference call | Yes |
| Voice codecs | iLBC, OPUS, G.729B, G.729A, G.726, G.723.1, G.711 |
| Fax compatibility | T.38 |
| Modem (RJ-11) ports | 8 |
| Ethernet LAN (RJ-45) ports | 2 |
| Caller ID | Yes |
| Call waiting | Yes |
| xDSL connection type | ADSL |
| Quality of Service (QoS) support | Yes |
| Reset button | Yes |
| Harmonized System (HS) code | 85177900 |

## FAQ

### How much does the VoIP telephone adapter Grandstream HT818 cost, and is it available for purchase?

The price is 129.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 168 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 08.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay, Installment. All transactions are 100% secure and encrypted.

### Can VoIP telephone adapter Grandstream HT818 be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Grandstream products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Grandstream service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

### Where can I download the instructions for VoIP telephone adapter Grandstream HT818?

You can download the instructions in PDF format from the “Instructions” section on the product description page. The file contains complete information about installation, setup, and usage.

## Image

https://aio.lv/img/cache/product/1037949/65783846_large.webp