Introduction
The GSC3518HS is a high definition multicast talk-back horn speaker that allows public spaces, large offices, school playgrounds, hospitals, parks and more verticals to build powerful outdoor announcement solutions that expand security and communication. This robust SIP speaker offers crystal clear HD audio functionality with a high-fidelity 50-Watt speaker and supports IP66 dust and water resistance. The stainless steel packaging is sturdy and durable and can be used in extreme weather conditions.The GSC3518HS supports POE++ input and POE+ output, catering to another device cascading scenarios. Users can easily sculpt a state-of-the-art security and PA announcement solution. Thanks to its modern industrial design and rich features, the GSC3518HS is an ideal SIP talk-back horn speaker for any setting.
Package Content
Label | Item | Quantity | Description |
a | GSC3518HS | 1 | Main GSC3518HS outdoor Smart Horn Speaker unit. |
b | Junction Box Cover | 1 | Protective housing for the rear cable connections. |
c | Expansion Bolts | 4 | Used for mounting the speaker bracket securely to a wall or ceiling. |
d | Cable Glands | 2 | Waterproof cable connectors to seal and protect input cables. |
e | Mounting Screws (PM 3 × 10 mm) | 3 | Screws for securing the junction box cover. |
f | Rubber Gaskets | 2 | Replaceable seals used to maintain waterproof performance. |
g | Backup Bolts (M4 × 10 mm) | 2 | Bolts for bracket adjustment and backup locking. |
h | Quick Installation Guide | 1 | Printed guide containing installation and setup instructions. |
i | Regulatory Paper | 1 | Document containing regulatory information. |
GSC3518HS Rear Panel Overview
The back panel of the GSC3518HS contains all primary wiring ports, grounding points, and mounting connections.
Proper wiring and grounding are essential to ensure safety, waterproof sealing, and reliable performance.
Port / Interface | Description |
PoE IN (LAN) | 10/100 Mbps Ethernet port with integrated PoE/PoE+/PoE++ power input for network connectivity and device power. |
PoE OUT | 10/100 Mbps Ethernet port with integrated PoE/PoE+ power output for providing network connectivity and power pass-through to another device, such as an additional IP speaker or camera. |
ALARM IN/OUT (IN1, IN2, GND, NO, COM) | Alarm interface consisting of two digital alarm inputs (IN1, IN2) and one relay alarm output (COM, NO), with a common ground connection (GND). |
LINE IN/OUT (IN+/–, OUT+/–, GND) | Differential audio input interface for connecting external audio sources, such as microphones, amplifiers, or powered speakers, to extend audio coverage. |
DC 24–48V (IN-, IN+) | DC power input terminal supporting a 24–48 V DC / 2 A power supply. |
Ground Wire Terminal | Screw used to connect the device chassis to the building’s earth grounding, providing surge protection and reducing electromagnetic interference (EMI). |
Security Eyebolt | Anchor point for attaching a safety cable or chain to secure the device against accidental falls. |
Anti-off Rope | Safety cable used to prevent accidental dropping or detachment of the device during installation or maintenance, ensuring physical safety and added mounting security. |
MIC | Built-in microphone port for audio capture, monitoring, or two-way communication functions. |
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Must Attach: Both the anti-off rope and ground wire must be installed before powering on the device.
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Use only the designated ground screw location. Do not attach the ground wire to any other internal screws.
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Ensure the rear cover is tightly sealed after wiring to maintain the device’s waterproof IP66 rating.
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Avoid pulling or twisting the Ethernet and alarm cables after connection to prevent damage to the internal board.
Mounting the GSC3518HS
Ceiling Mount
The GSC3518HS can be mounted on a ceiling or any flat overhead surface using the included expansion bolts.
This method ensures a stable, downward-facing audio projection, ideal for wide outdoor areas.
- Mark the Drill Points
- Use the bracket of the speaker (a) as a reference or follow the illustrated mounting pattern.
- Mark three holes on the ceiling in the exact layout:
- Horizontal spacing: 101 mm (3.98”)
- Vertical spacing: 33 mm (1.30”)
- Drill and Prepare the Mounting Surface
- Drill holes at the marked positions.
- Insert the expansion bolts (c) into each hole to secure the mounting base.
- Attach the Speaker Bracket
- Hold the speaker unit (a) with its bracket aligned to the drilled holes.
- Fasten the bracket using the installed expansion bolts (c).
- Ensure the bracket is fully tightened and the speaker hangs securely.
- Adjust Orientation
- After mounting, slightly adjust the angle of the speaker to direct sound output as desired.
- Make sure all bolts are firmly secured to prevent vibration or misalignment.
Pole Mount
The GSC3518HS can also be mounted onto a vertical or horizontal pole using metal straps (not included in the package).
This installation method is ideal for outdoor environments such as parking lots, campuses, or street areas where wall mounting is not suitable.
- Prepare the Speaker Assembly
- Use the speaker unit (a) with its attached mounting bracket.
- Position the speaker bracket against the mounting pole.
- Attach the Metal Straps
- Insert two metal hose clamps or stainless steel straps (not included in the package) through the mounting slots on the bracket.
- Wrap each strap tightly around the pole and fasten securely using a screwdriver or wrench.
- Ensure both straps are parallel and firmly tightened to prevent movement.
- Adjust the Speaker Orientation
- Once attached, adjust the tilt or rotation of the speaker (a) for optimal sound direction.
- Confirm that all fasteners are tight and the bracket does not slide along the pole.
- Check Cable Routing
- Guide all cables neatly through the mounting bracket to the back of the speaker.
- Make sure cables are not twisted or pinched between the pole and the bracket.
Installing The Speaker Support
This step involves connecting the cable glands and securing the junction box cover before final tightening of the speaker’s bracket position.
Proper sealing and bolt alignment ensure both waterproof integrity and stable speaker support.
- Connect the Cables
- Insert all power, network, and audio cables through the cable glands (d).
- Tighten the glands firmly to create a waterproof seal.
- Connect the cables to their respective ports inside the back cover (refer to the connection layout in Section 2).
- Attach the Junction Box Cover
- Place the junction box cover (b) onto the back housing, aligning the screw holes.
- Fasten it using the PM 3 × 10 mm screws (e) to secure the cover in place.
- Make sure the cover sits evenly and that all cable glands are facing downward.
- Replace Rubber Gaskets (if required)
- If the rubber gaskets (f) are worn, replace them with the included spares.
- Ensure the gasket surfaces are clean and fully pressed to maintain the waterproof seal.
- Secure the Speaker Bracket Angle
- Adjust the speaker’s tilt angle to the desired direction.
- Use the M4 × 10 mm bolts (g) to tighten the side pivot points on both sides of the bracket.
- Confirm both bolts are symmetrically tightened and the angle is locked.
- Final Check
- Verify that the junction box cover (b) and cable glands (d) are fully tightened.
- Ensure the speaker is stable, firmly mounted, and properly grounded.
- The bracket must not be over-tilted, refer to the illustration for correct alignment.
Accessing the Configuration Interface
Once the GSC3518HS is installed, access its configuration interface using either the device MAC address or the GS Search App. The MAC address can be found on the label attached to the device or on the product packaging.
Accessing the Web UI Using the MAC Address
- On a computer connected to the same network as the GSC3518HS, open a web browser.
- Enter the device URL using the following format:
http://gsc_<mac>.local - Press Enter to access the Web UI.
Example:
If the MAC address is C0:74:AD:11:22:33, enter: http://gsc_c074ad112233.local
Accessing the Web UI Using GS Search
- Download and install the GS Search application on a computer connected to the same network as the GSC3518HS.
- Launch GS Search, locate the GSC3518HS using its MAC address, and copy the IP address discovered by the application.
- Open a web browser and enter the IP address using the following format:
http://<ip_address> - Press Enter to access the Web UI.
Example:
If the discovered IP address is 192.168.6.15, enter: http://192.168.6.15
