Transform ordinary analog phones and fax machines into powerful VoIP endpoints. Award‑winning, compact, and easy to manage — the HT Series is the simplest way to bring existing landline devices into a modern IP‑based phone system, without replacing a single handset.
| Series Models | HT801 (1 FXS), HT802 (2 FXS), HT812 (2 FXS + Gigabit), HT814 (4 FXS), HT818 (8 FXS) |
| Type | Analog Telephone Adapter (ATA) / VoIP Gateway |
| FXS Ports | 1 to 8 – connect analog phones, fax machines, or modems |
| Network | 10/100 Mbps (HT801/802); Dual 10/100/1000 Mbps Gigabit (HT812/814/818) |
| PoE | Built‑in on HT814/818 (IEEE 802.3af); optional on others |
| Voice Codecs | G.711 (A/µ), G.722, G.723.1, G.726, G.729A/B, iLBC, Opus |
| HD Voice | Yes – advanced echo cancellation, jitter buffer |
| Fax | T.38 Fax Relay; G.711 pass‑through; auto‑fallback |
| Protocols | SIP (RFC3261), IPv4/IPv6, TCP/UDP, HTTP/HTTPS, TR‑069 |
| Call Features | Hold, transfer, forward, 3‑way conference, DND, call waiting, caller ID, redial |
| Security | TLS/SRTP encryption, HTTPS, secure authentication, fail2ban |
| Provisioning | Web GUI, auto‑provision (TR‑069, XML), zero‑touch with UCM |
| Mounting | Compact desktop/wall‑mount design; all units under 1 kg |
| Power | DC 5V/12V adapter (included); PoE on HT814/818 |
| Warranty | 1 Year Manufacturer Warranty |
Renowned globally for reliability, sound clarity, and ease of use. HT adapters have earned multiple industry awards for their performance and value.
An intuitive web interface lets you set up each analog port in minutes. No training needed — all settings are logically organised and clearly labelled.
Choose from a compact single‑port adapter to an 8‑FXS rack‑ready unit. Connect ordinary corded phones, cordless DECT sets, fax machines, or credit card terminals.
Advanced telephony functions (transfer, forward, conference, DND, caller ID) are fully supported, so your analog devices behave like powerful IP phones with your IP‑PBX.
Enterprise‑grade security ensures every call is encrypted from end to end. TLS secures signalling; SRTP encrypts voice. No eavesdropping, no tampering.
State‑of‑the‑art acoustic echo cancellation, voice activity detection, and wideband codecs (G.722, Opus) deliver crystal‑clear conversations even on legacy telephones.
Simply plug your existing landline phone into the HT adapter and it becomes a full SIP endpoint on your VoIP network. No rewiring, no phone swap.
Small footprint, silent operation, and low power consumption make HT adapters perfect for home offices, small business back rooms, and hospitality deployments.
Grandstream HT Series is the most popular range of Analog Telephone Adapters (ATAs) on the market. These compact devices connect traditional analog telephones, fax machines, and even modems to an IP network. They are the perfect bridge for businesses and homes that want the benefits of VoIP without abandoning trusted equipment.
Choose Your Size: The HT801 provides a single FXS port — ideal for connecting a single phone or fax. The HT802 offers two ports, perfect for a home office or a small store. The HT812 adds gigabit routing capability, while the HT814 supports up to 4 analog devices. For larger setups, the HT818 accommodates up to 8 analog ports. All models share the same advanced features and secure provisioning.
Plug, Configure, Call: Setting up is straightforward. Connect the HT to your router, plug an analog phone into the FXS port, and configure the SIP account via the built‑in web interface. With Grandstream UCM auto‑provisioning, even that step is automated — just plug in and the device self‑configures.
Full Telephony Support: Unlike basic adapters, the HT series handles advanced call features seamlessly. Transfer calls, set up 3‑way conferences, or use Do‑Not‑Disturb — all from a simple analog phone. The built‑in HD audio enhancement makes the call sound better than the phone’s original hardware ever could.
Security & Reliability: TLS and SRTP encryption protect your calls. HTTPS management and configurable failback features keep the adapter secure and resilient. The devices are backed by regular firmware updates and Grandstream’s global support network.
Why Choose HT Series? Because it’s the quickest, most cost‑effective way to integrate analog gear into a modern communication platform. With a 1‑year warranty and local support from Electro Creators, it’s a worry‑free investment. We deliver across Maharashtra, Madhya Pradesh, and Chhattisgarh.
For bulk orders, dealer pricing, or a demonstration, contact our team today.