Grandstream GSC3516 SIP/Multicast Talk-Back Speaker

The Grandstream GSC3516 is a premium SIP/Multicast talk-back speaker designed for seamless indoor intercom and paging applications across offices, schools, hospitals, and apartment complexes. This device delivers 2-way voice communication powered by a 15W high-fidelity HD speaker paired with a sophisticated microphone array consisting of three directional microphones utilizing Multichannel Microphone Array Design (MMAD) and one omnidirectional auxiliary microphone, offering clear voice pickup up to 4.2 meters.

Key Features:

• Full-duplex speakerphone operation with an HD acoustic chamber and advanced acoustic echo cancellation for crystal-clear communication.
• Supports wideband and fullband audio codecs, including Opus and G.722, ensuring superior audio quality.
• Integrated dual-band Wi-Fi (802.11 a/b/g/n/ac) combined with Bluetooth for versatile wireless connectivity and easy pairing with Bluetooth devices.
• Reliable network port: One 10/100 Mbps Ethernet port with PoE/PoE+ (802.3af/802.3at) support eliminates the need for separate power sources.
• Flexible peripherals support via a 2-pin multi-purpose input for call buttons, motion sensors, and other devices.
• Extensive paging features including SIP paging, multicast paging, group paging, Push-To-Talk (PTT), and call-waiting with priority override.
• Robust telephony and security protocols with SIP (RFC3261), TLS, SRTP, and comprehensive provisioning options via GDMS, TR-069, and firmware upgrades over TFTP/HTTP/HTTPS.

Design and Installation

For integrators and system builders, pairing the GSC3516 with Grandstream’s IP phones, PBXs, Wi-Fi access points, and facility access systems enables crafting tailor-made security and communication solutions.

For more information, datasheets, and support, visit the [Grandstream product page](https://www.grandstream.com/products/facility-management/intercoms-paging/product/gsc3516).