# VoIP telephone adapter Grandstream Networks HT881

**URL:** https://aio.lv/en/product--grandstream-ht881--10934415
**Data updated:** 2025-12-30 14:54 (EET)
**Category:** VoIP Gateways
**Manufacturer:** Grandstream
**Manufacturer code:** HT881
**EAN:** 6947273704782
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 178.49 €
**Prices and availability valid until:** 2026-07-21 23:59
**Price without VAT (21%):** 147.51 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--grandstream-ht881--10934415

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 09.07.2026 | free |
| Pickup points | 14.07.2026 | 1.89 EUR |
| Courier delivery to door | 14.07.2026 | 4.99 EUR |

## Summary description

The Grandstream Networks HT881 VoIP telephone adapter supports multiple voice codecs including G.711, G.723.1, G.726, G.729A, and G.729B. It is compatible with T.38 fax and features LED indicators for LAN, Power, and WAN. Security is ensured with AES, HTTPS, SIPS, and SSL/TLS protocols. Compact dimensions of 100 mm width, 28 mm depth, and 190 mm height make it suitable for various setups.

## Long description

The Grandstream Networks HT881 VoIP telephone adapter is an FXO/FXS gateway designed to connect traditional PSTN lines and analog phones to IP networks. It supports multiple voice codecs (G.711, G.723.1, G.726, G.729A, G.729B), T.38 fax, and offers LED indicators for LAN, Power, and WAN. Security features include AES encryption and secure protocols such as HTTPS, SIPS, and SSL/TLS. Its compact dimensions (100 mm × 28 mm × 190 mm) make the HT881 suitable for small offices and distributed deployments.
Advantages
The HT881 provides seamless integration between analog telephony and IP PBX or hosted VoIP services, combining FXO and FXS functionality in a single compact unit. It supports a wide range of codecs for voice quality optimization, T.38 for reliable fax transmission, and multiple security protocols to protect signaling and media. Easy automated provisioning and clear LED status indicators simplify installation and ongoing management.
Suitable for
Small offices and home offices requiring PSTN-to-VoIP connectivity
Branch locations that need integration with central IP PBX systems
Environments requiring reliable fax over IP (T.38)
Deployments where compact footprint and clear status indicators are needed
Key specifications
Model: Grandstream HT881
Ports: FXO and FXS (integrated gateway functionality)
Supported codecs: G.711, G.723.1, G.726, G.729A, G.729B
Fax: T.38 support
Security: AES, HTTPS, SIPS, SSL/TLS
LED indicators: LAN, Power, WAN
Dimensions: 100 mm (W) × 28 mm (D) × 190 mm (H)
How to use
Connect the HT881 to your network via the WAN/LAN port and attach analog phones or a PSTN line to the FXS/FXO ports as required. Access the web-based management interface to configure SIP account settings, codec priorities, fax settings (T.38), and security options. Use automated provisioning if available from your provider to simplify bulk configuration; otherwise, complete manual setup through the device GUI. Monitor LED indicators to verify power, network, and WAN status during and after installation.
Usage recommendations
For best voice quality, prioritize G.711 where bandwidth allows and enable G.729 only when bandwidth is constrained. Enable TLS/SRTP or HTTPS where supported to secure signaling and media. If fax is required, configure T.38 and test end-to-end fax transmission. Use automated provisioning for multiple devices to reduce configuration errors.

## Specifications

| Feature | Value |
|---|---|
| Dimensions (WxDxH) | 120 x 180 x 36 |
| Weight | 0.46 kg |
| Security algorithms | SSL/TLS, SIPS, HTTPS, AES |
| Operating relative humidity (H-H) | 10 - 90 |
| Storage temperature (T-T) | -10 - 60 |
| Operating temperature (T-T) | 0 - 40 |
| Height | 190 mm |
| LED indicators | WAN, Power, LAN |
| Width | 100 mm |
| Depth | 28 mm |
| Conference call | Yes |
| Voice codecs | G.729A, G.729B, 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 |
| Quality of Service (QoS) support | Yes |
| Reset button | Yes |

## FAQ

### How much does the VoIP telephone adapter HT881 cost, and is it available for purchase?

The price is 178.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 57 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 09.07.2026 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 HT881 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 HT881?

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/10934415/65784129_large.webp