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White rectangular network speaker with front grille and three directional microphones on top

Grandstream

Grandstream GSC3516 SIP multicast talk-back speaker 15W

SKU CH-DYXB-FRE6Z

A SIP multicast talk-back speaker delivering 15 W two-way HD audio with three directional microphones and 4.2 m pickup range

  • 15W HD speaker delivers clear two-way audio
  • 3 directional mics with MMAD capture voice from 4.2 metres
  • 1 omnidirectional mic adds full-room pickup
  • Dual-band 802.11 Wi-Fi plus Bluetooth enable flexible placement
  • PoE/PoE+ on 10/100 port powers the unit over a single cable

SIP/Multicast Talk-Back Speaker

The Grandstream GSC3516 is a SIP and multicast talk-back speaker built for two-way voice communication. It delivers 15W HD audio through an advanced acoustic chamber and supports full-band and wide-band codecs including Opus and G.722. Integrated dual-band Wi-Fi and Bluetooth provide flexible wireless connectivity.

Thermals noise and power

The unit draws power over a 10/100Mbps network port using PoE or PoE+, removing the need for a separate mains adapter. With no moving parts the speaker runs silently, making it suitable for quiet offices, classrooms or healthcare areas. Network-powered operation keeps cabling simple and heat output negligible.

Build integration

A 2-pin multi-purpose input allows connection of peripherals such as call buttons for extended control. Three directional microphones with MMAD and beamforming plus one omnidirectional microphone give a 4.2 meter pickup range for clear capture. The single network port handles both data and power, freeing AC outlets and reducing infrastructure complexity.

Highlights

  • 15W HD speaker delivers clear two-way audio
  • 3 directional mics with MMAD capture voice from 4.2 metres
  • 1 omnidirectional mic adds full-room pickup
  • Dual-band 802.11 Wi-Fi plus Bluetooth enable flexible placement
  • PoE/PoE+ on 10/100 port powers the unit over a single cable

Specifications

BrandGrandstream
ModelGSC3516
Shipping weight1.81 kg
Package size312 × 302 × 102 mm

Questions about this item

How is the GSC3516 powered and mounted, and what wiring step is often missed?

Connect the single 10/100 Mbps port to a PoE or PoE+ switch; the speaker draws power over that cable so no separate adapter is needed. The step installers forget is enabling PoE on the switch port before mounting the unit.

Which parts of the GSC3516 will need attention or replacement after extended use?

The 15 W driver and the four-microphone array are the only moving or wear-prone elements. Under normal indoor conditions they run for years; plan to inspect the grille for dust build-up and verify microphone sensitivity annually.

What is the first limitation you hit when the GSC3516 runs at full volume for long periods?

The 15 W amplifier reaches its thermal ceiling first; sustained maximum output triggers protection limiting to prevent overheating, so continuous loud paging will drop level until the unit cools.

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