Grandstream GSC3518HS Outdoor SIP Talk-Back Horn Speaker

Grandstream has expanded its GSC Series with the GSC3518HS Outdoor Horn Speaker, built for loud, clear paging in outdoor and high-noise environments. In their recent press release, Grandstream positions the GSC3518HS as a SIP-based option for wide-area notifications and talk-back communication across larger sites.

The GSC3518HS combines SIP + multicast paging with talk-back audio, making it a practical fit for campuses, warehouses, public venues, and industrial facilities—anywhere announcements need to carry and stay intelligible in real-world conditions.

Key Features

• High-output outdoor paging: 50W horn speaker with up to 126 dBA max volume for wide-area announcements in noisy environments.
• Outdoor-rated durability: IP66 protection plus a stainless-steel mounting bracket for permanent installs exposed to dust, rain, and spray.
• Two-way talk-back audio: Built-in 3-mic array with AI noise reduction to help the person speaking be heard more clearly during live talk-back.
• SIP + multicast paging options: Supports SIP paging, multicast paging, group paging, and priority override so urgent messages can cut through.
• Simplified power + deployment: PoE/PoE+/PoE++ input with PoE/PoE+ output and dual 10/100 ports—useful for cleaner cabling and streamlined installs.
• Integration-friendly audio: Line in/out connections and support for common streaming/playback methods (useful when tying into broader AV/security workflows).

Use Cases

The GSC3518HS is a strong choice for wide-area outdoor announcements in busy environments—like school grounds, yards and loading areas, industrial sites, and public spaces. It also fits well at gates, entrances, and perimeter locations where you want both paging and talk-back communication as part of a SIP/multicast system.

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Ready to add outdoor paging to your next deployment? View the Grandstream GSC3518HS at Streakwave.