NewswireTODAY - /newswire/ - Boston, MA, United States, 2026/02/04 - The new GSC3518HS provides an outdoor intercom and announcement solution that expands security and communication - Grandstream.com.

Grandstream, connecting the world with award-winning unified communications and networking solutions since 2002, today released an outdoor horn speaker. The new GSC3518HS is a SIP/multicast talk-back horn speaker that provides crystal clear HD audio, a high-fidelity 50-Watt speaker, and IP66-rated water and dust protection. Ideal for outdoor campuses, public spaces, large offices, school playgrounds, hospitals, parks, warehouses, and more, the GSC3518HS provides a powerful outdoor announcement solution that expands security and communication.

The GSC3518HS is built with a high-powered 50W speaker with maximum volume of 126dBA, ideal for coverage of expansive outdoor areas. It includes 3 microphones, AI-based background noise reduction, and intelligent text-to-speech to ensure every word is heard clearly in talk-back scenarios. The GSC3518HS supports SIP paging, multicast paging, call-waiting with priority override, and more. Other notable features of the GSC3518HS include:

• Full-band and wide-band audio codec support including Opus & G.722;
• One 10/100Mbps network port with PoE/ PoE+/PoE++ input, and one 10/100Mbps network port with PoE/ PoE+ output;
• Supports differential LINE IN and LINE OUT connections;
• IP66-rated waterproof and dustproof; includes a durable stainless steel bracket suitable for harsh outdoor environments;
• Supports Airplay, ONVIF, RTSP/HTTP streaming, local audio files, and mobile app playback.

Availability
The GSC3518HS is available now for purchase through Grandstream’s worldwide network of channel partners.

About Grandstream

Grandstream (grandstream.com) has been connecting the world since 2002 with unified communications and networking solutions that make communicating more impactful than ever before. Our award-winning solutions provide everything needed to build a seamless, easy-to-manage communication platform, offering a one-stop-shop for all networking, unified communications, collaboration and physical security solutions. Headquartered in Boston, MA, USA, Grandstream solutions are used in over 150 countries and trusted by global enterprises and small business alike for their quality, reliability, and innovation.

Agency / Source: Grandstream Networks, Inc.

Availability: All Regions (Including Int'l)

Traffic Booster: [/] Quick NewswireToday Visibility Checker

Distribution / Indexing: [+]  / [Company listed above is a registered member of our network. Content made possible by PRZOOM / PRTODAY indexing services]