Outcome
This companion comparison post compares Grandstream VOIP HT801 Analog Telephone Adapter to the top live alternatives found on April 10, 2026, including current Amazon and Alibaba checks.
Source Device
The Grandstream HT801 is a compact analog telephone adapter (ATA) designed to connect a traditional analog phone handset into a SIP-based Voice over IP (VoIP) environment. It features one FXS port and supports SIP registration over Ethernet, along with TLS and SRTP for security. It's particularly useful for integrating old-school phone hardware into Home Assistant for voice, intercom, or telephony experiments, enabling features like call waiting, forwarding, and 3-way conferencing. While it offers a path to connect analog voice endpoints to Home Assistant Assist, it's considered more infrastructure-heavy than a native smart speaker solution.
Top Alternatives
- Grandstream HT802 Analog Telephone Adapter: The Grandstream HT802 is the 2-port version of the HT801, offering similar core functionality but with the ability to connect two analog devices. It is explicitly mentioned as an alternative for Home Assistant's VoIP integration, although Home Assistant currently supports using only one of its two phone ports. It shares the same manufacturer's ecosystem, security features (TLS/SRTP), and auto-provisioning options as the HT801.
- Obihai OBi200 1-Port VoIP Phone Adapter: The Obihai OBi200 is a highly popular single-port ATA, directly comparable to the Grandstream HT801 in its function of connecting analog phones to VoIP services. It gained significant traction for its integration with Google Voice, offering a cost-effective home phone solution. While not natively integrated with Home Assistant's VoIP integration like Grandstream, it can be used with a SIP service or PBX that Home Assistant can connect to.
- Cisco SPA112 2-Port Phone Adapter: The Cisco SPA112 is a 2-port ATA that was widely deployed for connecting analog phones and fax machines to VoIP services, making it a direct functional alternative to the Grandstream HT801. It supports standard VoIP features and SIP. However, it has reached its end-of-sale and end-of-life dates, which significantly impacts its current buyer relevance and support.
Comparison Matrix
| Category | Grandstream VOIP HT801 Analog Telephone Adapter | Grandstream HT802 Analog Telephone Adapter | Obihai OBi200 1-Port VoIP Phone Adapter | Cisco SPA112 2-Port Phone Adapter |
|---|---|---|---|---|
| Features | Source device | ★★★★★ | ★★★★★ | ★★★★★ |
| Interoperability | Source device | ★★★★★ | ★★★★★ | ★★★★★ |
| Setup Ease | Source device | ★★★★★ | ★★★★★ | ★★★★★ |
| Cloud Dependency | Source device | ★★☆☆☆ | ★★★★★ | ★☆☆☆☆ |
| Vendor Trust | Source device | ★★★★★ | ★★★★★ | ★★★☆☆ |
| Overall | Source device | ★★★★★ | ★★★★★ | ★★★★☆ |
Pricing And Availability
| Device | Amazon Price | Alibaba Price |
|---|---|---|
| Grandstream HT802 Analog Telephone Adapter | $49.20 | US $12 – US $38 (various sellers) |
| Obihai OBi200 1-Port VoIP Phone Adapter | Currently unavailable | Not readily available (mostly bulk/used listings) |
| Cisco SPA112 2-Port Phone Adapter | Currently unavailable | Not readily available (mostly used/refurbished listings) |
Operator Notes
- The primary device category is Analog Telephone Adapter (ATA). These devices convert analog telephone signals into digital packets for transmission over an IP network (VoIP).
- Home Assistant's VoIP integration currently works with Grandstream HT801 and HT802 (using one port). Other ATAs can be integrated by configuring them as generic SIP clients to connect to a SIP service or PBX that Home Assistant can interact with.
- Scoring for 'Cloud Dependency' reflects whether the device requires a vendor-specific cloud service for core functionality or configuration. Lower scores indicate less cloud dependency.
- Scoring for 'Vendor Trust' considers factors like active support, product lifecycle, and brand reputation.
- Prices and availability are as of April 10, 2026, based on live web searches. 'Unavailable' means new units were not found readily for purchase from major retailers like Amazon or Alibaba.
Source URLs
Grandstream HT802 Analog Telephone Adapter | Official: https://www.grandstream.com/products/gateways-and-atas/analog-telephone-adapters/product/ht802
Grandstream HT802 Analog Telephone Adapter | Home Assistant: https://www.home-assistant.io/integrations/voip/
Grandstream HT802 Analog Telephone Adapter | Amazon: https://www.amazon.com/Grandstream-HT802-2-FXS-Analog-Telephone/dp/B075PN193C
Grandstream HT802 Analog Telephone Adapter | Alibaba: https://www.aliexpress.com/w/wholesale-grandstream-ht802.html
Obihai OBi200 1-Port VoIP Phone Adapter | Official: https://www.poly.com/us/en/products/phones/obi-adapters/obi200
Obihai OBi200 1-Port VoIP Phone Adapter | Home Assistant: https://community.home-assistant.io/t/voip-calls-from-ha-to-analog-phone-with-grandstream-device/579975
Obihai OBi200 1-Port VoIP Phone Adapter | Amazon: https://www.amazon.com/Obihai-OBi200-1-Port-Adapter-Support/dp/B00BUV7C9A
Obihai OBi200 1-Port VoIP Phone Adapter | Alibaba: https://www.alibaba.com/trade/search?fsb=y&IndexArea=product_en&keywords=Obihai+OBi200
Cisco SPA112 2-Port Phone Adapter | Official: https://www.cisco.com/c/en/us/products/collateral/unified-communications/small-business-voice-gateways-ata/data_sheet_c78-693452.html
Cisco SPA112 2-Port Phone Adapter | Home Assistant: https://community.home-assistant.io/t/voip-calls-from-ha-to-analog-phone-with-grandstream-device/579975
Cisco SPA112 2-Port Phone Adapter | Amazon: https://www.amazon.com/Cisco-SPA112-2-Port-Phone-Adapter/dp/B00684PN54
Cisco SPA112 2-Port Phone Adapter | Alibaba: https://www.alibaba.com/trade/search?fsb=y&IndexArea=product_en&keywords=Cisco+SPA112