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5G fronthaul links between DU and RU demand industrial-temperature optics that survive tower-top conditions. Apex supplies a complete fronthaul optical portfolio — 25G SFP28, 50G SFP56, 100G QSFP28, and BiDi single-fiber transceivers — pre-validated for eCPRI and O-RAN 7.2 split architectures.
-40 to +85INDUSTRIAL TEMP RANGE
1λSINGLE-FIBER BIDI
25G/50G/100GLINE RATES
5G fronthaul presents optical challenges that data center transceivers were never designed to solve:
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Remote Radio Units (RRUs) on towers experience -40°C to +85°C. Commercial-grade optics fail within months. Industrial-temperature (-I) optics are mandatory.
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Many tower sites have only one fiber strand to the RRU. BiDi (bidirectional) optics that TX/RX on different wavelengths over a single fiber are essential for these sites.
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25Gbps eCPRI fronthaul links demand sub-microsecond latency and strict jitter control. Optics must maintain clean eye diagrams at industrial temperature extremes.
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DU and RU equipment from different vendors (Ericsson, Nokia, Samsung, Mavenir) must interoperate seamlessly. Optics need broad platform qualification.
┌──────────┐ Single Fiber / Fiber Pair ┌──────────┐
│ DU │────25G SFP28 / 50G SFP56 BiDi─────────────│ RU/RRU │
│(Baseband)│ TX: 1270nm / RX: 1330nm (or reverse) │(Tower Top)│
└──────────┘ -40 to +85°C, Hardened └──────────┘
0–20 km reach
| RATE | PRODUCT | FORM FACTOR | REACH | APPLICATION |
| 25G | 25G SFP28 LR | SFP28 | 10 km SMF | eCPRI fronthaul, CPRI Option 10 |
| 25G | 25G SFP28 BiDi | SFP28 | 10–20 km single fiber | Single-fiber sites, tower-top RRU |
| 50G | 50G SFP56 LR | SFP56 | 10 km SMF | O-RAN 7.2 split, 5G NR carrier aggregation |
| 50G | 50G SFP56 BiDi | SFP56 | 10–20 km single fiber | Fiber-constrained tower sites |
| 100G | 100G QSFP28 LR4 | QSFP28 | 10 km SMF | DU aggregation, high-capacity RRU |
| 100G | 100G QSFP28 CWDM4 | QSFP28 | 2 km SMF | C-RAN hub, DU pool fronthaul |
-40°C
Industrial-temp rated, outdoor tower deployment
1λ
BiDi single-fiber saves 50% fiber cost
<1 µs
Latency per optical link (eCPRI compliant)
3yr
Field failure rate < 0.5% across deployed base
| CAPABILITY | WHY APEX |
| Industrial temp (-I) | Every fronthaul optic rated -40 to +85°C. Packaged in hermetically sealed TO-CAN with expanded-beam connectors for condensation resistance. |
| BiDi single-fiber | TX/RX on 1270/1330nm over a single SMF strand. 10-20 km reach. No external circulator or filter required. |
| eCPRI validated | Pre-tested with leading DU/RU platforms. Maintains clean eye diagram and sub-microsecond latency across full temperature range. |
| Stock availability | 25G/50G/100G fronthaul optics ship from inventory. Same-day dispatch for network rollout and emergency replacements. |
Our RAN optics engineers will match transceivers to your DU/RU platform, validate reach budgets, and provide a full fronthaul BOM — typically within 48 hours.
EMAIL[email protected]
WHATSAPP / PHONE+852 9821 3834
WEBSITEapexallinone.com
