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The HS03 Payphone is an industrial-grade wall-mounted wireless payphone specifically engineered for high-security prison environments and K-12 school campuses, combining rugged durability with advanced remote management capabilities. Designed by Kaier Electric, a leading provider of specialized communication solutions, this payphone addresses the unique challenges faced by correctional facilities and educational institutions: secure and controlled communication access, minimal maintenance requirements, and long-term reliability in high-traffic areas. With facial recognition authentication, centralized remote management, and a vandal-resistant metal construction, the HS03 Payphone delivers a cost-effective communication solution that prioritizes safety and operational efficiency.
Constructed from heavy-duty die-cast aluminum with rubber ring sealing, the HS03 Payphone offers exceptional resistance to rust, water, dust, and corrosion. The explosion-proof PC/ABS plastic handset and 304 stainless steel handset line with built-in high-strength tensile steel cable are designed to withstand intentional vandalism and heavy daily use, ensuring years of reliable service with minimal replacement costs.
Administrators have complete control over communication access through dual calling modes (Standard Mode and Approved Numbers Only mode) and configurable permitted calling hours. Facial recognition and card swipe authentication options eliminate physical contact, reduce contraband risks in prisons, and simplify user verification for students.
The cloud-based network management platform enables real-time device status monitoring, remote parameter configuration, and automated family number distribution. Remote firmware upgrades eliminate the need for costly and time-consuming on-site maintenance visits, significantly reducing operational overhead for large-scale deployments.
Supports 4G VoLTE high-definition voice calling for superior audio quality even in areas with weak signal coverage. The hot-swappable SIM card design allows for quick network changes without device shutdown, minimizing downtime and ensuring continuous communication access.
Beyond basic calling capabilities, the HS03 doubles as an attendance tracking tool, providing schools with a cost-effective all-in-one communication and student management solution. This integrated functionality eliminates the need for separate attendance systems and streamlines administrative processes.
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Intelligent Management Platform
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  | Robust Physical Design
User-Friendly Interface
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The HS03 is specifically designed to meet the strict security requirements of correctional facilities. Facial recognition authentication eliminates the need for physical cards or tokens, significantly reducing the risk of contraband smuggling. Strict call restriction capabilities ensure that inmates can only contact pre-approved family members and legal representatives, enhancing facility security.
The centralized management platform allows prison staff to monitor all calls in real-time, set individual calling privileges, and track usage patterns. The vandal-resistant construction withstands the harsh conditions of correctional environments, while remote maintenance capabilities reduce the need for staff to enter high-security areas for routine upkeep.
For K-12 schools, the HS03 provides a safe and reliable way for students to contact parents and school staff. Installed in teaching areas, dormitory corridors, and common areas, these payphones ensure that students have access to communication when needed, without the distractions of personal cell phones.
Dual authentication options (facial recognition or student ID card swipe) make it easy for students to use the phones while maintaining security. The integrated attendance tracking functionality allows schools to monitor student presence and streamline administrative processes. Approved Numbers Only mode prevents unauthorized calls and reduces classroom distractions, creating a more focused learning environment.
Category | Specifications |
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Model | HS03 |
Network | 4G (TD-LTE: B38/B39/B40/B41 optional; LTE FDD: B1/B3/B5/B8 optional) |
Display | 2.7" LCD, 128 × 64 pixels, black font with green backlight |
Power Adapter | Input: 100~240V AC; Output: 12V/1A DC |
Body Material | Die-cast aluminum |
Handset Material | Special explosion-proof PC/ABS plastic |
Handset Line | 304 stainless steel with built-in high-strength tensile steel cable |
Handset Suspension | Reed Switch |
Overall Dimensions | 371 × 260 × 113 mm |
Card Slot Thickness (Thin) | 0.7mm-1.3mm |
Card Slot Thickness (Thick) | 6.2mm-6.5mm |
Weight | Approximately 3.5 kg |
Installation Type | Wall mounted |
Installation Environment | Indoor; Outdoor with optional rain cover |
Working Temperature | -20℃ to +60℃ |
Storage Temperature | -30℃ to +70℃ |
Working Humidity | 20% to 95% (no condensation) |
Working Pressure | 86 to 106 Kpa |
The HS03 features a simple wall-mounted design that can be installed quickly using standard mounting hardware. The hot-swappable SIM card design allows for easy network changes or replacements without powering down the device. Remote firmware upgrades and parameter configuration eliminate the need for on-site maintenance visits, significantly reducing operational costs.
With its heavy-duty construction and high-quality components, the HS03 requires minimal routine maintenance. All parts are designed for long-term durability, and replacement components are readily available. Kaier Electric provides comprehensive user manuals and dedicated technical support to ensure smooth operation of your payphone system.
Yes, the HS03 can be installed outdoors with the addition of an optional rain cover. It is designed to withstand a wide range of environmental conditions, including temperatures from -20℃ to +60℃ and humidity levels up to 95%.
Inmates are registered in the management platform with their facial biometrics. When they want to make a call, they simply look at the camera, and the system verifies their identity within seconds before allowing access. This eliminates the need for physical cards and reduces contraband risks.
Absolutely. The management platform allows you to configure individual or group-specific approved number lists. You can also set specific calling hours and time limits for each user, ensuring complete control over communication access.
The HS03 supports multiple 4G bands for both TD-LTE and LTE FDD networks. Please contact our sales team to confirm compatibility with your local network provider and select the appropriate configuration for your region.
Firmware updates can be pushed remotely to all connected devices simultaneously through the cloud-based management platform. This process is automated and does not require any on-site intervention, minimizing downtime.
Kaier Electric provides customized communication solutions for prisons, schools, and other specialized facilities worldwide. Whether you need a single payphone or a large-scale deployment across multiple locations, our team will work with you to design a solution that meets your specific requirements and budget.
