# Grandstream SIP/Multicast Intercom Talk-Back Horn Speaker | GSC3518HS

The Grandstream GSC3518HS is a powerful SIP-enabled horn speaker designed for clear, high-volume paging and intercom communication in large indoor and outdoor environments. Featuring a 50W speaker with output up to 126 dBA, it ensures announcements remain clear even in noisy or open spaces such as warehouses, campuses, and public areas. Equipped with three built-in microphones and advanced noise reduction, the GSC3518HS supports reliable two-way talk-back communication. It offers SIP and multicast paging, priority-based announcements, and text-to-speech functionality for automated messaging. Dual network ports with PoE support simplify installation and allow for flexible deployment, while additional line-in and line-out connections enable integration with external audio systems. The device also supports streaming protocols for added versatility. Built with a durable IP66-rated enclosure, the GSC3518HS is designed to withstand harsh weather conditions, making it ideal for demanding environments requiring dependable, high-quality audio communication.

## Details

- **Price:** 6790.0 ZAR
- **Vendor:** Grandstream
- **Type:** Doorphone (Intercom)
- **Tags:** Doorphone (Intercom), Grandstream, Miro

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 6790.00 ZAR | In stock |

## Images

- Grandstream SIP/Multicast Intercom Talk-Back Horn Speaker | GSC3518HS
- Grandstream SIP/Multicast Intercom Talk-Back Horn Speaker | GSC3518HS
- Grandstream SIP/Multicast Intercom Talk-Back Horn Speaker | GSC3518HS
- Grandstream SIP/Multicast Intercom Talk-Back Horn Speaker | GSC3518HS
- Grandstream SIP/Multicast Intercom Talk-Back Horn Speaker | GSC3518HS
- Grandstream SIP/Multicast Intercom Talk-Back Horn Speaker | GSC3518HS
- Grandstream SIP/Multicast Intercom Talk-Back Horn Speaker | GSC3518HS
- Grandstream SIP/Multicast Intercom Talk-Back Horn Speaker | GSC3518HS

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> Source: [Guards On Duty Shop & Security Guards ](https://guardsondutyshop.co.za/products/grandstream-sip-multicast-intercom-talk-back-horn-speaker-gsc3518hs)
> Updated: 2026-06-23