Grandstream Releases New SIP Multicast Talk-Back Speaker

The new GSC3516 provides the ideal intercom speaker/microphone for offices, schools, hospitals, apartments and more

Boston, MA, USA - November 22, 2022 – Grandstream, connecting the world with award-winning unified communications and networking solutions, today announced a new intercom speaker/microphone. The new GSC3516 is a SIP multicast talk-back speaker that offers 2-way voice functionality through a 15-watt HD speaker, 3 directional microphones and 1 omnidirectional auxiliary microphone with a 4.2 meter voice pickup distance. Thanks to its' modern design, cleanable exterior surface and powerful features, the GSC3516 is the ideal intercom speaker/microphone for any setting. 


The GSC3516 supports a wide-range of peripherals including Bluetooth devices, built-in whitelists, blacklists and greylists to easily block unwanted calls, integrated dual-band Wi-Fi and advanced acoustic echo cancellation. By pairing the GSC3516 with other Grandstream devices, including desktop and cordless IP phones as well as the GDS series of Facility Access products, users can easily sculpt a state-of-the-art security and voice intercom solution. Additional features of the GSC3516 include:

  • Full-duplex speakerphone with HD acoustic chamber and advanced echo cancellation
  • 15-watt high-fidelity HD speaker
  • 3 directional mics with MMAD & microphone beamforming array and 1 omnidirectional auxiliary microphone to achieve a 4.2 meter voice pickup distance
  • Full-band and wide-band audio codec support including Opus and G.722
  • Integrated dual-band 802.11a/b/g/n/ac Wi-Fi
  • Built-in bluetooth to pair with Bluetooth devices
  • One 10/100Mbps network port with PoE/PoE+
  • 2-pin multi-purpose input to support peripherals including call buttons, motion sensors and more

Product Resources
Click here to visit the GSC3516 product page, which includes datasheets, technical resources and more.

Pricing and Availability
The GSC3516 is generally available now for purchase through Grandstream’s worldwide distribution channels.

About Grandstream
Grandstream Networks, Inc. has been connecting the world since 2002 with unified communications and networking solutions that allow businesses to be more productive than ever before. Our award-winning solutions serve the small-to-medium business and enterprises markets and have been recognized throughout the world for their quality, reliability, and innovation. Grandstream solutions lower communication costs, increase security protection and enhance productivity. Connect with us on FacebookLinkedIn and Twitter.

Grandstream Contact

Phil Bowers