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Small rectangular transceiver module with silver metal housing and black LC duplex port

Cisco Systems, Inc.

Cisco GLC-SX-MMD SFP 1000Base-SX Multi-mode Module with DOM

SKU CH-AC0F-AZJY0

Hot-swappable SFP module provides 1000Base-SX gigabit Ethernet over 50 µm or 62.5 µm multi-mode fiber with LC duplex connector and DOM support

  • Gigabit Ethernet links over multi-mode fibre
  • Hot-swappable SFP keeps the network running during upgrades
  • DOM support enables real-time link monitoring
  • Compatible with Catalyst and Nexus switches
  • Compact module fits dense chassis deployments

Cisco GLC-SX-MMD SFP module

This Cisco GLC-SX-MMD SFP transceiver provides a 1000Base-SX Gigabit Ethernet link over multimode fibre. It fits any MSA-compliant SFP slot and uses a duplex LC/PC connector for 50 µm or 62.5 µm cable. The hot-swappable design allows insertion or removal without powering down the switch. It is built for data-networking and optical-network environments that need short-haul connectivity.

Sustained-load behaviour with DOM

Digital Optical Monitoring reports real-time temperature, voltage, Tx and Rx power so administrators can track link health during continuous traffic. The module operates at the standard 1000Base-SX wavelength and maintains signal integrity across the full supported distance range. No active cooling is required because the transceiver stays within its thermal envelope under constant line-rate load. MSA compliance ensures consistent electrical and optical parameters over time.

Installation notes and common issues

The transceiver slides into any standard SFP cage and locks with a bail latch; no tools are needed. Compatibility spans a wide range of Cisco Catalyst, Nexus, ISR and uBR platforms listed in the vendor matrix. The most frequent problem is a mismatched fibre type — single-mode cable will not work with this multimode optic. Dirty or damaged LC ferrules are the second most common cause of link failures.

Highlights

  • Gigabit Ethernet links over multi-mode fibre
  • Hot-swappable SFP keeps the network running during upgrades
  • DOM support enables real-time link monitoring
  • Compatible with Catalyst and Nexus switches
  • Compact module fits dense chassis deployments

Specifications

No published specifications for this item yet.

Questions about this item

How much power does the GLC-SX-MMD draw and how hot does it get when running continuously?

The module is hot-swappable and weighs 2.65 oz; Cisco does not publish a continuous power-draw or temperature figure for this transceiver.

Which switch or router must I already have so the GLC-SX-MMD will function?

It fits any MSA-compliant SFP port on supported Cisco platforms such as Catalyst 2960, 3560, 3750, 4500, 4900, 6500, Nexus 7000, ISR 7200, 7300, 7600, uBR10000, ME 3400, IE 3010, MWR 2941, Catalyst 2350, 2360, 3000 and 3100 blade switches.

Will this module link with older 62.5 µm multimode fibre already in my building?

Yes — the transceiver supports both 62.5 µm and 50 µm multimode fibre over LC duplex connectors for 1000Base-SX distances.

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