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Optical network terminal

Calix GigaSpire u12 (GS2020E) & GM1020 — End-of-Life & EOSL Dates

Calix GigaSpire u12 (GS2020E) & GM1020 — end-of-sale and end-of-support dates by part number, from the Calix Customer Advisory Bulletin cited below.

Is the Calix GigaSpire u12 (GS2020E) & GM1020 end of life?

Past end of service

25/100

Little or no runway

Support Runway Score

Every tracked Calix GigaSpire u12 (GS2020E) & GM1020 SKU group is past Calix end of service life (last group Aug 2025). Units in production should be treated as unsupported. For past-EOSL units, weigh third-party maintenance, spares, replacement, or a documented run-to-failure.

Why this score

Past end of service life — 12 months ago
Vendor-published date, source-linked
Category: optical network terminal

The score reflects support-lifecycle timing and source confidence only — higher means more support runway. It is not a risk, safety or compliance rating. How it’s calculated →

Action priority

Critical

Every tracked part number is past end of service life — unsupported by the vendor.

End of service life

Aug 2025

Part numbers

Confidence

Vendor-published date

Last verified

Aug 2026

Source

Calix bulletin ↗

Check your part numbers in bulk →

GigaSpire u12 (GS2020E) & GM1020

EOSL — PAST

12 mo

past end of service

now

availableend of saleservice

End of saleJun 2020

End of serviceAug 2025Calix bulletin ↗

3 SKUs in this group

12mo past 000-01174GS4227E, 2.5G WAN, 4 GE LAN, dual band

12mo past 000-01175GS4220E, GE WAN, 4 GE LAN, dual band Wi-Fi

12mo past 100-05494GM1028, Dual band 2x2 Wi-Fi 6, GE LAN/WAN

Options from here

Unsupported now

The Calix GigaSpire u12 (GS2020E) & GM1020 is past Calix end of service life. These are the paths teams take from here:

Third-party maintenance

Keep it in production past the OEM cutoff with an independent maintainer.

Pre-stock spares

Buy spares now, while units still circulate on the secondary market.

Plan replacement

It is unsupported today — set a migration timeline and budget.

Run to failure

Low-criticality role — document the risk, harden backups, retire on your terms.

Check your exact part numbers → Weigh your support options →

Independent and informational — EOSL.ai sells no hardware or maintenance and lists no paid placements. Third-party maintenance keeps unsupported gear in production past the OEM cutoff; whether it fits depends on the asset's role.

Calix GigaSpire u12 (GS2020E) & GM1020 — questions

Is the Calix GigaSpire u12 (GS2020E) & GM1020 end of life?

Yes — every tracked GigaSpire u12 (GS2020E) & GM1020 SKU group is past its last date of support.

What is the last date of support for the GigaSpire u12 (GS2020E) & GM1020?

Aug 2025 — per the Calix end-of-sale bulletin.

Where do these GigaSpire u12 (GS2020E) & GM1020 dates come from?

Every end-of-sale and end-of-service-life date on this page links to the official Calix end-of-sale bulletin it was taken from.

On the same timetable

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