About Grandstream GSC3506V2 In Ceiling Flush Mount One Way SIP Intercom Speaker/ No MIC 30 Watt Speaker

The Grandstream GSC3506 V2 is a one-way SIP intercom and multicast paging speaker built for in-ceiling flush mount installation. Packing a powerful 30W high-fidelity speaker into a clean, modern design, it's well suited to offices, schools, hospitals, aged care facilities, and apartment buildings that need reliable, clear public address across multiple zones. It connects over your existing network via PoE, so there's no need for a separate power source.

Key Features

• 30W High-Fidelity Speaker — Delivers loud, clear audio up to 99dB SPL thanks to a specially designed HD acoustic chamber built for intelligible, room-filling sound.
• SIP & Multicast Paging — Supports SIP paging, multicast paging, group paging, push-to-talk (PTT), and call waiting with priority override for flexible PA setups.
• HD Audio Codecs — Full-band and wide-band codec support, including Opus and G.722, for crisp, clear announcements every time.
• PoE++ Powered — Supports 802.3bt Class 6 PoE++, so a single network cable handles both data and power — keeping your install tidy and cost-effective.
• Call Security Controls — Built-in whitelists, blacklists, and greylists make it easy to block unwanted calls and keep your PA system under control.
• Flexible I/O Ports — Includes a 3-pin line out, 2-pin switch-in input, alarm-in input, DC24V, USB, and network port for broad integration with existing security and communication systems.

Why Choose This Product?

If you're building out a PA or intercom system and need a ceiling speaker that works hard without creating headaches, the GSC3506 V2 is a top-notch choice. It's straightforward to deploy, plays nicely with most SIP-based phone systems, and is managed centrally through Grandstream's free GDMS platform. Our Telrexperts are happy to help you design the right paging solution for your space.

What's in the Box

• Grandstream GSC3506 V2 Ceiling Speaker
• Mounting Screws (M4 x 8)
• Mounting Hole Cut-Out Template
• Quick Installation Guide