GRANDSTREAM HT812 Analog Telephone Adapter User Guide
Learn how to operate and manage the Grandstream HT812/HT814 Analog Telephone Adapter with this user guide. A flexible and affordable VoIP solution for both residential and office environments, the HT812/HT814 offers advanced functionality, voice quality, and security protection. Ideal for small and medium businesses looking to create integrated IP and PSTN telephony systems.