Ericsson KRD 901 800/1 – High-Performance Radio Technology for Modern Networks

The Ericsson KRD 901 800/1—commercially known as the AIR 1641 B2/25a B66a—is a powerful and future-ready radio unit designed to meet the growing demands of today’s mobile networks. Built for reliability, efficiency, and exceptional radio performance, this advanced RRU brings carrier-grade capability to any LTE deployment.

Engineered as a multi-standard outdoor radio, the KRD 901 800/1 supports a wide range of modern frequency bands, including Band 2/25 and Band 66, enabling operators to enhance coverage and capacity while ensuring maximum flexibility in network planning. Its support for LTE, multi-carrier operation, and NB-IoT integration makes it a versatile solution for dense urban environments as well as rural expansion.

At the heart of this unit is a 16 × 16 TX/RX architecture, delivering outstanding MIMO performance and up to 320 watts of total RF power. This allows networks to handle higher traffic volumes, maintain stable connections, and deliver superior user experiences—even during peak demand.

Designed for harsh outdoor conditions, the KRD 901 800/1 features a rugged, weather-resistant enclosure, convection cooling, and a broad operating temperature range from –40°C to +55°C. Installation is flexible, with support for pole, wall, and mast mounting, making it suitable for nearly any deployment scenario.

With four 10-Gbps optical interfaces, seamless CPRI connectivity, and Ericsson’s well-known radio efficiency, the AIR 1641 series helps operators build faster, more capable, and more energy-efficient LTE networks.

Whether you are expanding an existing infrastructure or building a next-generation mobile system, the Ericsson KRD 901 800/1 stands as a proven, high-performance choice that delivers reliability, scalability, and world-class radio technology.

Technical Specifications – Ericsson KRD 901 800/1

Model Identifier: Ericsson KRD 901 800/1
Commercial Name: AIR 1641 B2/25a B66a
Type: Multi-standard Outdoor Remote Radio Unit (RRU)

Supported Frequency Bands

• Band 2 / 25

  • UL: 1850–1915 MHz

  • DL: 1930–1995 MHz

• Band 66

  • UL: 1710–1780 MHz

  • DL: 2110–2200 MHz

Radio Capabilities

• LTE with QPSK, 16QAM, 64QAM, 256QAM

• NB-IoT support (in-band & guard-band)

• Multi-carrier operation

• Massive MIMO architecture

• 16 × TX / 16 × RX paths

• Approx. 10 W per TX path (≈320 W total RF power)

Interfaces

• 4 × Optical CPRI ports (10 Gbps)

• Optical control & data interface

• −48 VDC power input

Environmental Specifications

• Operating temperature: −40 °C to +55 °C

• Passive convection cooling

• Mounting: Pole, wall, or mast

• Operating altitude: < 4000 m

Mechanical

• Size: ~1555 × 635 × 320 mm

• Weight: ~101 kg

• Outdoor IP-rated enclosure

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