Allnet ALL126AS3 "VDSL2" Slave Modem

Allnet ALL126AS3 “VDSL2” Slave Modem is a compact, high‑performance device designed to extend VDSL2 networks in both residential and commercial environments. Its architecture centers around the Lantiq VRX chipset, which delivers reliable data rates up to 100 Mbps over standard copper pairs while maintaining backward compatibility with ADSL.

Key Technical Specifications

• Ethernet LAN Ports: 4 × RJ‑45 interfaces supporting IEEE 802.3, 802.3u, and 802.3z standards for fast Ethernet (10/100 Mbps).
• Modem Interface: 2 × RJ‑11 ports enabling direct connection to the copper VDSL2 line.
• Serial Management: 1 RS‑232 port allows configuration and diagnostics via a standard serial console.
• Power Consumption: 6.7 W in normal operation, ensuring low energy usage for continuous deployment.
• Operating Temperature: 0 °C to 50 °C, suitable for most indoor installations.
• Storage Temperature: -20 °C to 70 °C, allowing the unit to be stored in a wide range of climates before deployment.
• Humidity Range: 10 %–90 % relative humidity during operation, providing resilience against typical indoor moisture levels.
• Dimensions & Weight: 183 mm × 145 mm × 36 mm; 385 g, making it easy to mount on a wall or rack without significant space requirements.
• Certification: CE marked, confirming compliance with European safety and electromagnetic compatibility standards.

Design & Build Quality

The Allnet ALL126AS3 features a rugged metal chassis that protects the internal circuitry from mechanical shock and vibration. The front panel is neatly organized: two RJ‑11 jacks for the VDSL line, four RJ‑45 Ethernet ports, an RS‑232 connector, and indicator LEDs for power, link status, and activity on each port.

Internally, the Lantiq VRX chipset handles all modulation, demodulation, and error correction tasks. The device’s firmware is optimized to maintain stable line conditions even in noisy copper environments, reducing packet loss and latency for real‑time applications such as VoIP or video conferencing.

Installation & Configuration

Setting up the ALL126AS3 is straightforward:

1. Connect the VDSL line: Plug both RJ‑11 cables into the modem ports. The device will automatically detect the line and negotiate the highest possible data rate supported by the service provider.
2. Power on: Attach the supplied power adapter (not included in this article) to the unit’s DC input. The LED indicators confirm successful bootup.
3. Configure via RS‑232: Using a terminal emulator, connect to the serial port and follow the manufacturer’s command set to adjust parameters such as VLAN tagging, QoS policies, or firmware updates.
4. Connect Ethernet devices: Attach computers, switches, or routers to any of the four RJ‑45 ports. The device will provide 10/100 Mbps connectivity out of the box; for gigabit speeds, a separate gigabit switch can be chained downstream.

Use Cases & Applications

The ALL126AS3 is ideal for:

• Point‑to‑Point VDSL Links: Acting as the slave side in a point‑to‑point configuration, it extends high‑speed connectivity between two locations over existing copper.
• Small Office / Home Office (SOHO): Providing reliable broadband access with four Ethernet ports for multiple devices.
• Industrial Environments: Its wide temperature and humidity tolerances make it suitable for factory floors or warehouses where environmental conditions can fluctuate.
• Network Expansion: When paired with a master VDSL modem, the ALL126AS3 can serve as an additional access point, increasing overall network capacity without the need for fiber installation.

Performance Highlights

The Lantiq VRX chipset delivers robust VDSL2 performance by employing advanced modulation techniques such as G.992.5 (VDSL2) and optional vectoring support when available from the service provider. Key performance metrics include:

• Maximum Downstream Rate: Up to 100 Mbps over a standard copper pair.
• Maximum Uplink Rate: Typically 10–20 Mbps, sufficient for most upload‑heavy applications.
• Latency: Sub‑millisecond round‑trip times in optimal line conditions, enabling smooth VoIP and real‑time gaming experiences.

Reliability & Maintenance

The ALL126AS3’s firmware is designed for long‑term stability. Regular updates can be applied via the RS‑232 interface to patch security vulnerabilities or enhance performance features. The device’s low power draw and passive cooling architecture reduce the likelihood of overheating, ensuring consistent operation over extended periods.

Conclusion

The Allnet ALL126AS3 “VDSL2” Slave Modem combines a powerful Lantiq VRX chipset with a user‑friendly design to deliver dependable high‑speed connectivity across copper lines. Its four Ethernet ports, serial management interface, and robust environmental specifications make it an excellent choice for anyone needing a reliable VDSL2 extension or point‑to‑point solution in residential, commercial, or industrial settings.