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3Com 3CSFP91 Compatible 1000BASE-SX SFP 850nm 550m DOM Transceiver
  • 3Com 3CSFP91 Compatible 1000BASE-SX SFP 850nm 550m DOM Transceiver
  • 3Com 3CSFP91 Compatible 1000BASE-SX SFP 850nm 550m DOM Transceiver
  • 3Com 3CSFP91 Compatible 1000BASE-SX SFP 850nm 550m DOM Transceiver


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3Com 3CSFP91 Compatible 1000BASE-SX SFP 850nm 550m DOM Transceiver

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Product Code: 3CSFP91
Cozlink Price: US$6.00
Shipping Costs: US$27.84 to United States Via FEDEX-IP
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  • Description
  • Transaction Records
ManufacturerCozlinkPlace of OriginShenzhen, China ModelCZT-P851G-S5D
Data Rate1000BASE(1.25G)Fiber ModeMulti Mode Fiber (MMF)Types of InterfaceLC
Types of LaserVCSELOperating TemperatureStandard 0~70°C,Extended -20~85°COperating Humidity0%~90% RH (no condensing)
Transmission distance550mModes of CommunicationsDuplexWavelength850nm
Receiver Sensitivity-<18dBmExtinction Ratio>9dBSaturated Optical Power-3dBm
Pull Ring ColorBlackForm FactorSFP(Mini GBIC)Warranty1-3 Years
Power Consumption<3WWeight 0.024kgPower Supply+3.3V
ConditionNew Hot Pluggable Times200 Average Output Power-9.5 ~ -3dBm
Compatible Brand3Com

The 3COM 3CSFP91 compatible SFP transceiver provides 1000Base-SX (1.25G) throughput up to 550m over multi-mode fiber (MMF) at a wavelength of 850nm using  LC connector

The transceiver consists of three sections: a VCSEL laser transmitter, a PIN photodiode integrated with a trans-impedance preamplifier (TIA) and MCU control unit. All modules satisfy class I laser safety requirements.The transceivers are compatible with SFP Multi-Source Agreement (MSA) and SFF-8472. For further information, please refer to SFP MSA.

It is guaranteed to be 100% compatible with the equivalent 3COM transceiver. This easy to install, hot swappable transceiver has been programmed, uniquely serialized and data-traffic and application tested to ensure that it will initialize and perform identically. Digital optical monitoring (DOM) support is also present to allow access to real-time operating parameters. 

All of Cozlink products are 100% tested , and can be completely applied in Ethernet, Fibre Channel network devices, such as switches and routers. Also selling in eBay and amazon,we have fully stocked,high production efficiency and fast delivery time. All of our transceivers are Trade Agreements Act (TAA) compliant.

If you want to get latest product datasheet or don’t know how to buy it, please feel free to contact our service online.

(Note: Class 1 laser output power is less than 0.4mW,it won’t be harmful to eyes,we can ensure the safe in design. DDM function can help system management to predict the life of optical transceivers, isolate system faults and verify the modules compatibility in the site installation.)

Product Specifications
  • Data-rate of 1.25Gbps operation
  • 850nm VCSEL laser and PIN photodetector
  • Compliant with SFP MSA and SFF-8472 with duplex LC receptacle
  • Digital Diagnostic Monitoring: Internal Calibration or External Calibration
  • 500m transmission with 50/125µm MMF
  • 300m transmission with 62.5/125µm MMF
  • Operating case temperature: Standard: 0 to +70°C Extended: -20 to +85°C
  • Compatible with ROHS
  • +3.3V single power supply
  • Gigabit Ethernet
  • Fiber Channel
  • Switch to Switch interface
  • Switched backplane applications
  • Router/Server interface
  • Other optical transmission systems

Platform Support
3Com 3CSFP91 is supported on a wide range of 3Com equipment.
4800G Switch Series - 4800G 24-Port (JD007A) 4800G Switch Series - 4800G 48-Port (JD010A) 4800G Switch Series - 4800G PWR 48-Port (JD011A) 7750G Switch Series - 7757 7-Slot 8800 Series Switch - 8810 (3C17541) Baseline Switch - 2222 Baseline Switch - 2224 PWR Baseline Switch - 2226 PWR Plus (3CBLSF26PWR) Baseline switch - 2250-SFP Plus (3CBLSF50) Baseline Switch - 2824-SFP Plus Baseline Switch - 2916 Baseline Switch - 2924 PWR Baseline Switch - 2926 PWR Plus Baseline Switch - 2928 HPWR OfficeConnect Switch - 3CDSG8 OfficeConnect Switch - 3CRDSF9PWR S7900E Switch Series - S7906E (8 Slots) S7900E Switch Series - S7910E (12 Slots) Switch 4500 - 4500 Switch 5500-EI 28-Port FX
4800G Switch Series - 4800G 24-Port SFP (JD009A) 4800G Switch Series - 4800G PWR 24-Port (JD008A) 7750G Switch Series - 7754 4-Slot 7750G Switch Series - 7758 8-Slot 3COM Switch-3848 Baseline Switch - 2224 Baseline Switch - 2226 Baseline Switch - 2226 SFP Plus (3CBLSF26) Baseline Switch - 2816-SFP Plus Baseline Switch - 2848-SFP Plus Baseline Switch - 2924 Baseline Switch - 2926 Baseline Switch - 2928 Baseline Switch - 2928 PWR OfficeConnect Switch - 3CR1609-91 S7900E Switch Series - S7902E (4 Slots) S7900E Switch Series - S7906E-V (5 Slots) Switch 42100 - 42100 Switch 5500-EI 28-Port Switch 5500-EI 52-Port
Packaging for Transceiver
  • Packaging for Transceiver
  • Antistatic bag
  • Packed on pallets in a box (Default Customer Options)
  • Specific labels as request
  • Separate white box for each transceiver
  • 10pcs/20pcs each package; 10 units/ carton
International Authoritative Certification

Compliance with the international ISO9001, CE, FCC, RoHS standards.Cozlink strict implementation of standardized management and control of the design, development, production, installation and service.

Q&A (Total 1) Show all   


Hello There, No. You should use the same type of SFP transceiver at both ends. Cozlink Support Team

Nov 29,2016

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