Alcatel‑Lucent MDR‑8606‑135 – 6 GHz Digital Microwave Radio

The Alcatel‑Lucent MDR‑8606‑135 is a high‑capacity digital microwave radio operating in the 6 GHz frequency band, designed for point‑to‑point communication in telecom backhaul and private network applications. As part of the MDR‑8000 family, this radio system provides reliable, high‑speed data transmission over distances up to 80 km (with appropriate antennas and site conditions). It supports both TDM (E1/T1) and packet‑based (Ethernet) traffic, making it a versatile solution for hybrid legacy‑IP networks.

Frequency and Capacity Specifications

The MDR‑8606‑135 covers the 6.4‑6.8 GHz band (subject to regional licensing), with a channel bandwidth of 40 MHz. It supports adaptive modulation from BPSK to 256‑QAM, allowing throughput up to 400 Mbps in optimal conditions. The radio includes forward error correction (FEC) and adaptive equalization to mitigate multipath fading and interference. The system employs a duplex frequency spacing of 252 MHz and includes a built‑in frequency agile synthesizer for quick channel changes.

Interfaces and Connectors

The radio unit provides two Gigabit Ethernet ports (RJ45) for IP traffic, four E1/T1 ports (via BNC or RJ‑48) for legacy TDM, and an RS‑232 serial port for management. It also includes a 50‑ohm N‑type connector for the antenna feed, and a 10 MHz reference input/output for external synchronization. The Ethernet ports support IEEE 802.1Q VLAN and QoS prioritization, ensuring seamless integration with carrier‑grade networks.

Modulation and Performance

The MDR‑8606‑135 employs OFDM and single‑carrier modulation, with automatic mode switching based on real‑time link quality. The receiver sensitivity is better than ‑90 dBm for 64‑QAM, and the system has a link budget exceeding 100 dB. Built‑in error counters and BER monitors provide performance insights. The radio also includes ATPC (Automatic Transmit Power Control) to optimize output power and reduce interference to adjacent links.

Management and Diagnostics

Management is enabled via SNMP, Web GUI, or CLI. The radio supports remote firmware upgrades, alarm logging, and performance monitoring (PM) with 15‑minute and 24‑hour statistics. A front‑panel LCD display shows key parameters such as received signal level, frequency, and system status. The unit also includes a built‑in spectrum analyzer for site surveying and frequency planning.

Physical and Environmental Specifications

The MDR‑8606‑135 is housed in a compact outdoor‑rated enclosure (IP67) with dimensions 300 mm x 250 mm x 100 mm, weighing 4 kg. It operates on ‑48 V DC power (nominal), with a consumption of 35 W. Temperature range is ‑30 °C to +60 °C, and humidity up to 100 % condensing. It complies with ETSI and FCC standards for microwave radio.

Installation and Commissioning

Installation involves mounting the unit on a mast or wall, connecting the antenna and cables, and aligning the dish for maximum received signal. Commissioning is performed via a laptop running the configuration software, setting the frequency, output power, and modulation parameters. Link alignment is aided by a built‑in audible tone that indicates signal strength.

Applications

Typical applications include mobile network backhaul, enterprise campus connectivity, and disaster recovery links. Its 6 GHz band is widely used for medium‑capacity trunk routes.

Maintenance and Upgrades

Routine maintenance includes checking antenna alignment, weatherproofing connections, and verifying power supply. Firmware upgrades are performed over Ethernet. Spare parts are available through Alcatel‑Lucent support channels.

Conclusion

The Alcatel‑Lucent MDR‑8606‑135 6 GHz digital microwave radio offers robust, high‑capacity transmission for demanding communication needs, ensuring reliable performance in diverse environmental conditions.