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

# Key Highlights
  • Type: SFP
  • Compatibility: Cisco 1000BASE-SX SFP
  • Tx/Rx Wavelength: 850 nm. / 850 nm.
  • Media Type: Multi-Mode Fiber (MMF)
  • Optical Budget: 7.5 dB
  • Max. Distance: 550 m
  • Data Rate: 1.25Gbps
  • Temperature: Standard 0°-70°C
# Pricing & Ordering
SKU: 1.25G-SFP-550D-CI


Standard recommended retail price without VAT.

Lead Time: Next Business Day from Order Confirmation
# Quality Assurance

Because of our comprehensive Testing Program, we are confident on quality of our products. Such approach empower us to cover all our products with:

# Key Technical Data
Media Type:

TX Wavelength:

RX Wavelength:

Minimum Optical Budget:

Maximum Distance:

Supported Data Rate:

Supported Applications:


Temperature Range:


Tx Wavelength Bandwidth:

Rx Wavelength Bandwidth:

Minimum Transmitting Power:

Maximum Transmitting Power:

Receiver Sensitivity:

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Transmitter Type:

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# Product Documentation
Compatible Cisco GLC-SX-MMD Datasheet PDF

Our Cisco GLC-SX-MMD Datasheet PDF is based on our compatible product 1.25G-SFP-550D. When You will order it will be encoded to be compatible with Cisco equipment and it will be labeled with part number: 1.25G-SFP-550D-CI, where CI means Cisco Compatible. Above You can download datasheet of our 1.25G-SFP-550D product with exact same specs.

# Product 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!


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 original 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.