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Technical Data Sheet
PartsTable / TRANSCEIVER / GLC-SX-MM
GLC-SX-MM ✓ Verified by PartsTable
CISCO · TRANSCEIVER · SFP_1G
WHAT YOU NEED TO KNOW
Transceivers — match specs to PN exactly. Clarify what the customer wants: OEM compatible or actual manufacturer, new or refurbished. Get serial numbers from the vendor before buying and validate with the manufacturer before purchase. We ship tested and validated. Key checks: Clarify OEM vs compatible. Get serial numbers BEFORE buying. Validate serials with manufacturer BEFORE purchase.
Some have holograms and serial number validation
PRODUCT OVERVIEW
CISCO 1000BASE SX FIBRE SFP MODULE

CISCO 1000BASE SX FIBRE SFP MODULE. Key specifications include Connector: Duplex LC, Data Rate: 1 Gbps, Fiber Type: Multimode (MMF), Wavelength: 850 nm, DOM Support: Yes, Form Factor: SFP. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5999-01-556-6859, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
TRANSCEIVER→ SFP_1G→ GLC-SX-MM
NSN: 5999-01-556-6859
FSC: 5999
CAGE: 03UZ7 — CISCO SYSTEMS, INC. (USA)
SPECIFICATIONS
ConnectorDuplex LC
Data Rate1 Gbps
Fiber TypeMultimode (MMF)
Wavelength850 nm
DOM SupportYes
Form FactorSFP
Max Distance550 m (depending on fiber type)
NSN5999-01-556-6859
COMPONENT DIAGRAM
BAIL LATCH 10G SFP+ 850nm · SR (MMF, 300m) DOM: Digital Optical Monitoring TX RX LC DUPLEX 20-PIN EDGE CONNECTOR ~56.5 mm ~13.4mm SFP+ TRANSCEIVER | 10G | 850nm | SR (MMF, 300m) Hot-swappable | LC duplex fiber | DDM/DOM supported TITLE SFP+ XCVR PN GLC-SX-MM MFR CISCO Cisco 1000BASE Sx Fibre SFP Module
TYPICAL APPLICATIONS
  • Data center switch-to-switch interconnects
  • Server-to-storage fabric connectivity
  • Long-distance fiber optic links
  • High-speed uplink connections (10G/25G/40G/100G)
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
GLC-SX-MMD=Interchangeable
CISCO 1000BASE-SX SFP transceiver module, MMF, 850nm, DOM
interchangeable
GLC-SX-MMInterchangeable
Cisco 1000BASE Sx Fibre SFP Module
interchangeable
146-0214/13Interchangeable
interchangeable cross-reference
interchangeable
GLC-SX-MM=Interchangeable
interchangeable cross-reference
interchangeable
7248129-1Interchangeable
interchangeable cross-reference
interchangeable
7248129Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99ESD SensitiveNot HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is GLC-SX-MM?
GLC-SX-MM is a Cisco 1000BASE Sx Fibre SFP Module manufactured by CISCO. It is classified as a TRANSCEIVER (SFP_1G).
What parts can replace GLC-SX-MM?
There are 11 known substitutes for GLC-SX-MM: GLC-SX-MMD=, GLC-SX-MM, 146-0214/13 and 8 more. Substitute compatibility should be verified for your specific system.
What is the NSN for GLC-SX-MM?
GLC-SX-MM is cataloged in the Federal Logistics Information System (FLIS) under NSN 5999-01-556-6859. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026