The Grandstream GSC3506 is a powerful SIP speaker for public address announcements, ideal for a variety of settings, such as offices, schools, hospitals, and apartments. With crystal clear HD audio and a high-fidelity 30-Watt HD speaker, it offers exceptional sound quality.

The GSC3506 also has built-in whitelists, blacklists, and greylists, making it easy to block unwanted calls, and supports SIP and multicast paging, group paging, and PTT. Its modern industrial design and rich features make it easy for users to create a state-of-the-art security and PA announcement solution.

HD acoustic chamber equipped speaker

Offers SIP paging, multicast paging, call-waiting with priority override features

Supports full-band and wide-band audio codecs such as Opus & G.722

Includes 1x 2-pin switch-in input port, 1x Alarm-in input port, vol+/- Key, reset, 1x network port, 1x USB port

Comes with one 10/100Mbps network port with PoE/PoE+ support