Quick Answer: What replaced SFP-GSX/LC-AE?
Discontinued: SFP-GSX/LC-AE | Replacement: SFP-GMM-550
Why B+B SMARTWORX Discontinued the SFP-GSX/LC-AE
The B+B SMARTWORX SFP-GSX/LC-AE is marked as obsolete, which means it is fully discontinued and no longer in active production. For IT buyers, that status matters because SFP-GSX/LC-AE is no longer available for new purchasing programs, planned network expansions, or standard refresh cycles. While public research confirms the obsolete status of SFP-GSX/LC-AE, it does not provide an announced EOL date or a detailed manufacturer explanation beyond the fact that the part is no longer active.
In practical terms, the discontinuation of SFP-GSX/LC-AE means procurement teams should treat the module as unavailable and move to a current sourcing option. The available research also does not publish a formal end-of-life timeline, so buyers should not expect a staged transition window based on public listings. If your network design, spares inventory, or maintenance plan still references SFP-GSX/LC-AE, this is a good time to update documentation and evaluate SFP-GMM-550 as the replacement path.
It is also important to note that publicly available search results do not confirm whether SFP-GMM-550 is the official manufacturer-designated replacement. However, if your organization has standardized on SFP-GMM-550 as the successor to SFP-GSX/LC-AE, you should still validate compatibility against your switch, media converter, or industrial Ethernet platform before placing volume orders.
What's New in the SFP-GMM-550
Current replacement path for obsolete SFP-GSX/LC-AE demand
The main change for buyers is availability. SFP-GSX/LC-AE is obsolete and no longer in active production, while SFP-GMM-550 is the replacement part being used for ongoing procurement. For organizations that need to keep multimode fiber links operational, this shifts the purchasing conversation from sourcing legacy SFP-GSX/LC-AE stock to validating and ordering SFP-GMM-550.
Public technical data is limited
Research confirms that SFP-GSX/LC-AE is a 1000Base-SX multimode SFP with a 550 meter range and an LC duplex connector. That gives buyers a baseline for the discontinued module. However, the available research data does not provide technical specifications for SFP-GMM-550, so a full spec-by-spec comparison cannot be made from public search results alone. That means procurement and engineering teams should request current datasheets or support confirmation before final approval of SFP-GMM-550.
Migration should be handled as a validation project
Because the technical details for SFP-GMM-550 are not included in the provided research, the move from SFP-GSX/LC-AE to SFP-GMM-550 should be treated as a controlled replacement rather than an assumed one-to-one swap. Check optical standard, supported fiber type, connector format, distance requirements, and host compatibility. This is especially important in industrial networks where SFP behavior can vary by platform and firmware.
Documentation and spare stock updates
If your internal BOMs, approved vendor lists, or maintenance runbooks still list SFP-GSX/LC-AE, update those records now. Using SFP-GMM-550 in new documentation helps reduce purchasing delays and prevents teams from chasing discontinued B+B SMARTWORX inventory. It also helps standardize future support cases around a currently orderable part number.
At-a-Glance Comparison
| Feature | SFP-GSX/LC-AE | SFP-GMM-550 |
|---|---|---|
| Manufacturer | B+B SMARTWORX | B+B SMARTWORX |
| Lifecycle status | Obsolete / fully discontinued | Replacement part in current use |
| Purchase availability | No longer available for purchase | Available via Tecisoft search |
| Official replacement confirmation | Not applicable | Not publicly confirmed in provided research |
| Optical standard | 1000Base-SX | Not available in provided research |
| Fiber type | Multimode | Not available in provided research |
| Maximum range | 550 m | Not available in provided research |
| Connector | LC duplex | Not available in provided research |
| EOL date | Not announced | Not applicable |
| Discontinuation reason | Marked obsolete and no longer in active production | Not applicable |
Upgrade Checklist
- Identify every installed SFP-GSX/LC-AE module in switches, media converters, and spare inventory.
- Review your network design requirements, including fiber type, link distance, connector type, and 1GbE optical standard.
- Verify that the host device supports the intended replacement module and check any platform-specific SFP qualification requirements.
- Request current technical documentation for SFP-GMM-550 if you need confirmation beyond the public research available for SFP-GSX/LC-AE.
- Update procurement records, BOMs, and maintenance standards to remove SFP-GSX/LC-AE as an active purchasing item.
- Test SFP-GMM-550 in a representative deployment before rolling it out across production sites.
- Keep a documented record of validated compatibility results for future purchasing and support teams.
- Use a current supplier source for SFP-GMM-550 to avoid delays tied to discontinued SFP-GSX/LC-AE searches.
Bottom Line
SFP-GSX/LC-AE is fully discontinued by B+B SMARTWORX and should be treated as an obsolete part with no ongoing purchase availability. SFP-GMM-550 is the replacement part to evaluate, but the provided public research does not include enough technical detail to confirm a complete like-for-like specification match.
For most buyers, the next step is straightforward: retire SFP-GSX/LC-AE from active procurement, validate SFP-GMM-550 against your network requirements, and update internal documentation to support future orders and maintenance.
Ready to switch? Shop SFP-GMM-550 →
