SIP / Multicast · Outdoor Paging
Grandstream GSC3518HS
A SIP/multicast talk-back horn speaker with crystal-clear HD audio, a high-fidelity 50-Watt speaker, and IP66-rated water and dust protection — ideal for outdoor campuses, public spaces, schools, hospitals, parks, and warehouses. Supplied and supported in Zimbabwe by Vectraops.
- High-powered 50W speaker with maximum volume of 126 dBA for expansive outdoor coverage
- 3 microphones, AI-based background noise reduction, and intelligent text-to-speech for clear talk-back
- Full-band and wide-band audio codec support, including Opus & G.722
- Differential LINE IN and LINE OUT connections
- Supports AirPlay, ONVIF, RTSP/HTTP streaming, local audio files, and mobile app playback
- SIP paging, multicast paging, call waiting with priority override, and more
- One 10/100Mbps port with PoE/PoE+/PoE++ input and one 10/100Mbps port with PoE/PoE+ output
- IP66-rated waterproof and dustproof with durable stainless steel bracket for harsh outdoor environments
High-Powered 50-Watt Speaker
A 50W speaker with a maximum volume of 126 dBA lets the GSC3518HS cover large indoor and outdoor spaces — school playgrounds, warehouses, campuses, and public areas across Zimbabwe.
3 Built-In Microphones
Three built-in microphones, AI-based background noise reduction, and intelligent text-to-speech ensure every word is heard clearly in talk-back and intercom scenarios.
Hear Everything Clearly
AI noise reduction blocks out background noise so the microphones capture important voices and sounds — critical for security paging and two-way communication in busy sites.
Protection from the Elements
IP66-rated waterproof and dustproof protection plus durable materials and a stainless steel bracket keep the GSC3518HS performing in harsh outdoor environments.
Ideal for Large Venues
Designed for public spaces, schools, warehouses, parks, hospitals, factories, ports, markets, and other large indoor and outdoor venues that need clear SIP or multicast paging.
Grandstream Device Management System
GDMS provides a free centralised interface to provision, manage, monitor, and troubleshoot Grandstream products — including GSC paging speakers, device and account management, configuration, firmware upgrades, alarms, and site-level analytics. Security features include TLS encryption, two-factor login, and two-way certificate verification. Sign up at gdms.cloud. Vectraops can help you size PoE++ capacity and deploy outdoor paging with UCM or CloudUCM in Zimbabwe.
GSC3518HS & Related Paging Speakers
Get Free Consultancy, or request a GSC3518HS quote. Related indoor/outdoor GSC paging models appear below when synced.
Frequently Asked Questions
What is the Grandstream GSC3518HS?
The GSC3518HS is a SIP/multicast talk-back horn speaker with a high-fidelity 50W speaker (up to 126 dBA), three microphones with AI noise reduction, and IP66 outdoor protection. Vectraops supplies and supports it in Zimbabwe.
Where is the GSC3518HS typically used?
It is ideal for outdoor campuses, school playgrounds, warehouses, parks, hospitals, factories, ports, markets, and other large indoor or outdoor venues that need clear public address and talk-back.
Does the GSC3518HS need special PoE?
It has one 10/100Mbps port with PoE/PoE+/PoE++ input and a second port with PoE/PoE+ output for daisy-chaining another device. Contact Vectraops to size switch PoE budgets correctly.
Can it work with UCM or CloudUCM?
Yes. The GSC3518HS supports SIP paging and multicast paging and can be provisioned via GDMS alongside Grandstream PBX platforms. Talk to our Harare team for a BOM matched to your site.
Where can I get the official datasheet?
Download the English GSC3518HS datasheet from this page. Vectraops hosts the PDF on our site so you do not need to leave for product specs.
Deploy GSC3518HS with Vectraops
We help Zimbabwean schools, campuses, warehouses, and public sites design SIP/multicast paging coverage, size PoE++ switch ports, and integrate horn speakers with UCM or CloudUCM.