Nokia ASIK (PN 474021A) — AirScale Common Unit for 5G (Indoor)

1) Product overview

The Nokia ASIK is the 5G-generation AirScale common plug-in unit used inside the AirScale System Module. It integrates control, transport and O&M processing, provides synchronization/timing for the BTS, and supports system-module chaining for scalability. It is explicitly described by Nokia as the indoor common unit supporting 5G. 

• Typical product code in channel: 474021A (variants such as 474021A.101 / .102 exist). 

• Designed for use in AirScale indoor subracks as part of the System Module. 

2) Interfaces & connectivity (front-panel)

Per Nokia’s AirScale hardware description, ASIK exposes the following ports/roles:

• Backhaul / higher-layer fronthaul: 2 × SFP28 labeled EIF1 / EIF2, supporting 1/10/25 GbE. 

• System extension (module chaining): 1 × QSFP+ (SEI) for AirScale System Module chaining/expansion. 

• Synchronization & alarms: SIN / SOUT / EAC (ext. sync IN/OUT; external alarms & controls). 

• Local management: LMP (RJ-45). 

The figure for ASIK in Nokia’s document lists “DC IN, EAC, SIN, SOUT, LMP, SEI, EIF1, EIF2” on the front panel, with the connectivity types above. 

3) Performance / power

• Typical power consumption: ≈ 115 W (planning value stated by Nokia for ASIK). 

• Functional role: OAM, central call processing & backhaul support for 5G-era deployments. 

Nokia’s same portfolio note shows ASIB (~85 W) and ASIA (~80 W) for LTE/SRAN, while ASIK is the 5G common unit with SFP28 (25 GbE) capability—useful对比以便选型。

4) Environment & installation (system context)

• Installation: Indoor AirScale System Module (subrack). Nokia’s reference subrack (AMIA) is specified for –5…+55 °C operation; ASIK is installed as an indoor plug-in common unit in that environment. 

• System topology: Supports chaining of multiple AirScale System Modules via SEI to scale capacity and provide redundancy. 

5) Compatibility notes (capacity units & portfolio context)

• 5G capacity units such as ABIL / ABIC list ASIK among compatible common units (for eCPRI/25 GbE fronthaul). Use the ASIK + ABIL/ABIC pairing for 5G macro or mixed LTE/5G sites. 

• Nokia’s official baseband page positions newer AirScale cards as higher-capacity, lower-energy and ReefShark-based for evolution toward 6G—ASIK fits this 5G common-unit role in that lineup. 

6) Security / variant awareness

• Security advisory: The U.S. CISA advisory references ASIK AirScale System Module versions 474021A.101 / .102 regarding a web UI script insertion issue (addressed by Nokia). When procuring used units, confirm software release and patches. 

7) Key specs summary (for your product page)

Sources for all rows above: Nokia AirScale Flexi/AirScale 2018 hardware description with the ASIK page (interfaces/power/role); Nokia baseband portfolio page; CISA advisory for PN variants.