Answer
Sep 14, 2026 - 02:07 PM
The Grandstream HT812 and HT813 are both analog telephone adapters, but they have a key difference in their functionality. The HT812 is a 2-port FXS gateway, meaning it can connect two analog phones or fax machines to a VoIP network. In contrast, the HT813 includes one FXS port and one FXO port, allowing it to connect an analog phone as well as interface with a traditional phone line, providing additional flexibility for integrating VoIP with existing telephony infrastructure.
