Intercom · Two-Way

Grandstream GSC3516

Name: Grandstream GSC3516
Brand: Grandstream
Availability: InStock

15W Two-Way Talk-Back Intercom Speaker with 4 Microphones

The Grandstream GSC3516 is a SIP and multicast talk-back speaker that lets offices, schools, hospitals and apartments build powerful voice intercom solutions. This robust device offers two-way voice with a high-fidelity 15W HD speaker, three directional microphones using Multichannel Microphone Array Design plus one omnidirectional auxiliary microphone for a 4.2-metre pickup distance, built-in allowlist and blocklist call filtering, integrated dual-band Wi-Fi, Bluetooth peripheral support and advanced acoustic echo cancellation.

15W HD Speaker

Two-way talk-back

4 Microphones Total

3 directional + 1 omni

Allowlist & Blocklist

Block unwanted calls

4.2m Pickup Range

Room-wide coverage

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Technical Features

The Flagship Indoor Intercom Speaker

The GSC3516 is the most capable indoor GSC speaker, combining serious output with a four-microphone pickup array and call filtering.

High-Fidelity 15W HD Speaker

A 15W speaker delivers announcements and intercom audio clearly across larger indoor spaces

3 Directional + 1 Omni Microphone

Three directional microphones with MMAD plus one omnidirectional auxiliary microphone give a 4.2-metre pickup distance

Advanced Echo Cancellation

Full-duplex operation with advanced acoustic echo cancellation keeps two-way conversation natural

Allowlist and Blocklist

A built-in allowlist and blocklist make it easy to block unwanted calls to the device

Integrated Dual-Band Wi-Fi

Wireless connectivity supports installation where structured cabling is not available

Bluetooth Peripheral Support

Supports a wide range of Bluetooth devices for flexible deployment

PoE and PoE+ Powered

A single Ethernet run provides both network connection and power to each unit

SIP and Multicast Talk-Back

Pair with other Grandstream endpoints to build a complete facility intercom and paging system

Free GDMS Management

Centralised provisioning, monitoring and firmware management at no additional cost

Frequently Asked Questions

Grandstream GSC3516 — Common Questions

Everything you need to know about the Grandstream GSC3516 before you buy.

What is the Grandstream GSC3516?

The GSC3516 is a SIP and multicast talk-back speaker that offers two-way voice functionality. It allows offices, schools, hospitals, apartments and similar facilities to build powerful voice intercom solutions that expand security and communication.

How many microphones does the GSC3516 have?

It has four in total: three directional microphones using Multichannel Microphone Array Design with a beamforming array, plus one omnidirectional auxiliary microphone. Together they provide a 4.2-metre pickup distance.

How does the GSC3516 compare with the GSC3510?

Both offer two-way intercom. The GSC3516 has a more powerful 15W speaker versus the GSC3510's 8W, adds an omnidirectional auxiliary microphone, and includes allowlist and blocklist call filtering.

Can I block unwanted calls to the GSC3516?

Yes. The device includes a built-in allowlist and blocklist, so you can control which extensions or numbers are permitted to call the speaker.

What environments is the GSC3516 designed for?

It is designed for offices, schools, hospitals, apartments, retail centres, warehouses and similar indoor environments where both intercom and paging are needed.

How do I buy the Grandstream GSC3516 in India?

Cohesive Technologies is an authorised Grandstream distributor for India, Sri Lanka, Nepal and the Maldives. Contact our team for GSC3516 pricing, stock availability, demo units and pre-sales design support, and we will connect you with your nearest authorised partner.