GLC-SX-MMD Cisco Compatible 1G 550M MMF SFP module

Cisco
SFP
1.25G
Duplex
550 m
GLC-SX-MMD Cisco Compatible 1G 550M MMF SFP module

Cisco compatible GLC-SX-MMD - Key Features

  • Compatibility: Cisco
  • Media Type: Multi-Mode Fiber (MMF)
  • Fiber Count: Duplex
  • Connector: Double LC/UPC
  • Maximum Distance: 550 m
  • Guaranteed Link Budget: 7.5 dB
  • Tx Wavelenght: 850 nm
  • Supported Data Rate: 1.063 Gbps - 1.25 Gbps
  • DDM/DOM: Supported
  • Temperature Range: Standard 0°-70°C

Cisco GLC-SX-MMD Price

SKUSKU:1.25G-SFP-550D-CI
Lead timeIn Stock - Ships Next Business Day
Standard recommended retail price ex VAT:
5.14
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Telecoms & Integrators Globally

Cisco compatible GLC-SX-MMD Specifications

Form Factor
SFP
Media Type
Multi-Mode Fiber (MMF)
Fiber Count
Duplex
Connector
Double LC/UPC
Maximum Distance
550 m
Guaranteed Link Budget
7.5 dB
TX Wavelength
850 nm
RX Wavelength
850 nm
Supported Data Rate
1.063 Gbps - 1.25 Gbps
Supportet Ethernet Applications
Gigabit Ethernet (1.25 Gbps)
Supported Fiber Channel Applications
1G Fiber Channel (1.0625 Gbps)
DDM/DOM
Supported
Tx Wavelength Bandwidth
20 nm (840-860 nm)
Rx Wavelength Bandwidth
20 nm (840-860 nm)
Minimum Transmitting Power
-9.5 dBm
Maximum Transmitting Power
3 dBm
Receiver Sensitivity
-17 dBm
Receiver Overload
-3 dBm
Dispersion
110 ps/nm ps/nm
Transmitter Type
VSCEL Laser
Receiver Type
PIN photodiode
Temperature Range
Standard 0°-70°C
Power
+3.3V single power supply
Compliance
CE, Class 1 FDA and IEC60825-1 Laser Safety Compliant, INF-8074i, RoHS, SFP MSA

Cisco compatible GLC-SX-MMD Datasheet

v3

Complete technical specifications and product details

Updated:Jan 16, 2026Format:PDF

Cisco compatible GLC-SX-MMD Description

Our compatible Cisco GLC-SX-MMD price and datasheet pdf is based on our product 1.25G-SFP-550D which supports standard 1000BASE-SX application and is SFP (Small Form factor Pluggable) Transceiver, operating over Double Fiber Multi-Mode Fiber (MMF) optical cable. This transceiver is often referred as Cisco 1000Base-SX GBIC, but it’s oldest form factor – correct is SFP. It has minimum guaranteed optical budget of 7.5 dB, with in most cases is enough to reach about 550 m distance over multi-mode fiber. However, distance is just indicative parameter calculated for comfort of identification. Eventually we calculate distance taking in account minimal optical budget and average attenuation of optical cabling in industry. This transceiver uses top quality VSCEL Laser transmitter with operating at nominal wavelength 850 nm. and 850 nm. PIN Photodiode receiver. It supports DDM/DOM optical diagnostics, with provide diagnostic information about the present operating conditions. Based on Cisco GLC-SX-MMD specs SFP operates in Standard 0°-70°C temperature range and has Double LC interface. SFP support 1.25Gbps data rate and such applications as Gigabit Ethernet (1.25 Gbps). SFP Double Fiber optical transceiver is multi-purpose module used in number of different places of today’s networking. Consequently, most popular applications are Internet Service Provider (ISP) Gigabit Ethernet communication links, Enterprise LAN & SAN Networks, Data Center LAN & SAN Networks and other optical links. For detailed compatible GLC-SX-MMD (10-2626-01) specs please refer to Cisco GLC-SX-MMD datasheet PDF, which is based on our product 1.25G-SFP-550D.

Transceiver is CE/RoHS certified and it is Compliant with product safety standards. We perform compatibility tests for Compatible Cisco 1000Base-SX SFP transceiver module MMF 850nm DOM with latest platforms of Cisco networking equipment, which allows us to encode transceiver EEPROM memory to be compatible and work seamlessly with Cisco platforms. However, our optical transceivers are compliant to SFP Multi Source Agreement INF-8074i industry standard as well. Because our focus is providing top quality service, we are performing serious quality checks before delivery of our products. As a result, we do optical parameter measurements, connector cleanness tests and SFP transceiver EEPROM memory data validation tests. If you have any questions on Cisco GLC-SX-MMD datasheet pdf, specs or price don't hesitate to Contact Us!

FAQ:

For Cisco GLC-SX-MMD Datasheet you should refer to Cisco website, Cisco SFP Modules section, however feel free to check our compatible GLC-SX-MMD datasheet pdfas well.It is 1000BASE-SX short wavelength EXT (extended temperature range -5 to 85C) module, has integrated DOM (Digital Optical Monitoring), uses VSCEL laser and runs on 850nm Wavelength, over MMF (Multi-Mode Fiber) cable, for distances up to 550 meters using OM4/OM5 type cable.As Cisco GLC-SX-MMD is used for data transmission over MMF (Multi-Mode Fiber) maximum interconnection distance will depend based on Multi-Mode Fiber type and is as follows: 275m (OM1), 550m (OM2/OM3/OM4/OM5).As a 1000BASE-SX module Cisco GLC-SX-MMD speed is 1 Gbps.GLC-SX-MMD is SFP form factor optical transceiver and it’s weight is 22 grams.GLC-SX-MMD is 1000BASE-SX short wavelength module and it’s connector type is: Double LC.For original Cisco GLC-SX-MMD please refer to Cisco Global Price List, however our compatible product price is 5.46 EUR.GLC-SX-MMD is 1000BASE-SX optical module uses 850nm wavelength laser and is designed for use with multimode fiber only.GLC-SX-MMD is Cisco 1000BASE-SX SFP optical module and it’s 10G version is SFP-10G-SR which is 10GBASE-SR Module.GLC-SX-MM is technically EOL and is replaced with GLC-SX-MMD. Both are 1000BASE-SX SFP transceiver module, MMF, 850nm, modules where GLC-SX-MM has no DOM (Digital Optical Monitoring) and GLC-SX-MMD has DOM.Both are modules designed for use over MMF (Multi-Mode Fiber), use 850nm laser, where GLC-SX-MMD is 1000BASE-SX module and SFP-10G-SR is 10GBASE-SR Module.

Frequently Asked Questions

Where can I find GLC-SX-MMD datasheet?

For Cisco GLC-SX-MMD Datasheet you should refer to Cisco website, Cisco SFP Modules section, however feel free to check our compatible GLC-SX-MMD datasheet pdf as well.

What are main Cisco GLC-SX-MMD specs?

It is 1000BASE-SX short wavelength EXT (extended temperature range -5 to 85C) module, has integrated DOM (Digital Optical Monitoring), uses VSCEL laser and runs on 850nm Wavelength, over MMF (Multi-Mode Fiber) cable, for distances up to 550 meters using OM4/OM5 type cable.

What is Cisco GLC-SX-MMD distance?

As Cisco GLC-SX-MMD is used for data transmission over MMF (Multi-Mode Fiber) maximum interconnection distance will depend based on Multi-Mode Fiber type and is as follows: 275m (OM1), 550m (OM2/OM3/OM4/OM5).

What is GLC-SX-MMD speed?

As a 1000BASE-SX module Cisco GLC-SX-MMD speed is 1 Gbps.

What is GLC-SX-MMD weight?

GLC-SX-MMD is SFP form factor optical transceiver and it's weight is 22 grams.

What is Cisco GLC-SX-MMD connector type?

GLC-SX-MMD is 1000BASE-SX short wavelength module and it's connector type is: Double LC.

What is Cisco GLC-SX-MMD price?

For origional Cisco GLC-SX-MMD please refer to Cisco Global Price List, however our compatible product price is 5.46 EUR.

Is GLC-SX-MMD single mode or multimode module?

GLC-SX-MMD is 1000BASE-SX optical module uses 850nm wavelength laser and is designed for use with multimode fiber only.

What is GLC-SX-MMD 10G version?

GLC-SX-MMD is Cisco 1000BASE-SX SFP optical module and it's 10G version is SFP-10G-SR which is 10GBASE-SR Module.

GLC-SX-MM vs GLC-SX-MMD - what is the difference?

GLC-SX-MM is technically EOL and is replaced with GLC-SX-MMD. Both are 1000BASE-SX SFP transceiver module, MMF, 850nm, modules where GLC-SX-MM has no DOM (Digital Optical Monitoring) and GLC-SX-MMD has DOM.

GLC-SX-MMD vs SFP-10G-SR - what is the difference?

Both are modules designed for use over MMF (Multi-Mode Fiber), use 850nm laser, where GLC-SX-MMD is 1000BASE-SX module and SFP-10G-SR is 10GBASE-SR Module.