What Should You Check Before Buying Refurbished Ericsson Radio Units?
Jun 02, 2026
Before buying refurbished Ericsson radio units (RRUs/AEUs), focus on model compatibility, RF performance, firmware/license status, physical condition, and supplier credibility—the top five risk areas for 4G/5G deployments. Below is a complete, field-proven checklist.
1. Model & Compatibility Verification
1.1 Exact Model & Revision
Confirm full part number (PN) and hardware revision (e.g., Radio 4415 B41, Radio 6488 V1.0).
Match to your frequency bands (e.g., n78/3.5GHz, n41/2.6GHz, n8/900MHz) and MIMO config (4T4R/6T6R/32TRX).
Verify BBU compatibility (e.g., Ericsson Baseband 6630/6650) and fronthaul interface (25G eCPRI/10G CPRI).
1.2 4G/5G Standard Support
Ensure 3GPP R15/R16 compliance (5G NR, DSS, Massive MIMO).
Confirm O-RAN readiness (open fronthaul, multi-vendor integration) if needed.
2. Equipment History & Serial Validation
Serial number (SN) check: Cross-reference with Ericsson to confirm:
Manufacturing date (prefer <5 years old for 5G units).
Original deployment and decommissioning reason (avoid fault-induced removal).
No active recalls or known hardware issues.
Usage records: Ask for operational hours, maintenance logs, and repair history.
Red flags: Missing SN, vague history, or units from failed deployments.
3. Physical & Environmental Inspection
3.1 External Condition
No corrosion, water damage, or bent connectors (critical for outdoor IP65 units).
Clean heatsink (no dust clogging → overheating risk).
Intact housing (no cracks, dents, or loose screws).
Connector integrity: SMA/CPRI ports with no bent pins or cross-threading.
3.2 Environmental Ratings
Confirm IP65 (dust/waterproof) for outdoor RRUs.
Check operating temperature range (-40°C to +55°C).
4. Firmware, Licenses & Features
Firmware version: Load latest Ericsson approved SW (e.g., 5G NR R16).
License validation:
Valid 4G LTE/5G NR licenses (no expired entitlements).
Key features: DSS, Carrier Aggregation, Massive MIMO.
Software support: Confirm compatibility with your OSS/BSS and management tools.
5. RF Performance & Functional Testing
5.1 Key RF Metrics (Must Meet OEM Specs)
Output power: ±2dBm tolerance (e.g., 2×60W for 4T4R).
EVM: ≤3% for 5G NR (critical for signal quality).
Frequency accuracy: ±0.05ppm.
VSWR: <1.5 (no antenna/feedline issues).
5.2 Required Test Reports
Bench test: Supplier provides RF performance, throughput, and stability logs.
Calibration: ISO 17025-accredited calibration (≤12 months old).
On-site trial: 72-hour stress test (traffic load, handover, interference).
6. Refurbishment Process & Quality Assurance
Refurb standard: Ask for OEM-compliant process docs (inspection, cleaning, component replacement, testing).
Replaced parts: List of worn components (e.g., fans, power supplies) swapped with genuine Ericsson parts.
Testing coverage: 100% functional + RF + environmental testing (temperature/vibration).
