---
title: Grandstream SIP/Multicast Intercom Speaker/Microphone
date: 2025-09-25T11:08:27Z
modified: 2026-05-05T16:50:00Z
permalink: "https://tech.co.za/product/grandstream-sip-multicast-intercom-speaker-microphone-gsc3516/"
type: product
status: publish
excerpt: SIP/Multicast Talk-Back Speaker, 3 directional mics, 1 omnidirectional mic, 15W HD speaker, 1x Ethernet 10/100 PoE, Wi-Fi, no PSU
wpid: 552325
product_brand:
  - Grandstream
product_type:
  - simple
product_visibility:
  - featured
  - outofstock
product_cat:
  - Accessories
  - Speakers
featured_image: "https://tech.co.za/wp-content/uploads/2025/09/17920.webp"
---

The Grandstream GSC3516 is a two-way SIP and multicast intercom speaker and microphone designed for clear public address and intercom communication. It features a high-fidelity 15W speaker and three directional microphones with Multichannel Microphone Array Design (MMAD), offering a pickup distance of up to 4.2 metres. The device supports both SIP and multicast paging, allowing flexible deployment options. Connectivity includes integrated dual-band 2.4/5GHz Wi-Fi, Bluetooth support, and a 10/100Mbps network port with PoE/PoE+. The GSC3516 is ideal for security and communication solutions in schools, offices, hospitals, and retail centres.
Key features

Two-way SIP and a multicast intercom speaker and microphone
15W high-fidelity speaker and three directional microphones with MMAD
Microphone pickup distance up to 4.2 metres
Supports SIP and multicast paging
Dual-band 2.4/5GHz Wi-Fi and Bluetooth connectivity
10/100Mbps network port with PoE/PoE+ support
Suitable for schools, offices, hospitals, and retail centres