Cisco DS-SFP-FC4G-SW Compatible 4Gb FC 850nm SFP
Cisco compatible DS-SFP-FC4G-SW - Key Features
- Compatibility: Cisco
- Media Type: Multi-Mode Fiber (MMF) -OM3/OM4/OM5
- Fiber Count: Duplex
- Connector: Double LC/UPC
- Maximum Distance: 400 m
- Average Link Budget: 6.1 dB
- Tx Wavelength: 850 nm
- Supported Data Rate: 1.25 Gbps - 11.32 Gbps
- DDM/DOM: Supported
- Temperature Range: Standard 0°-70°C
Cisco DS-SFP-FC4G-SW Price
Cisco compatible DS-SFP-FC4G-SW Specifications
Form Factor | SFP+ |
Media Type | Multi-Mode Fiber (MMF) -OM3/OM4/OM5 |
Fiber Count | Duplex |
Connector | Double LC/UPC |
Maximum Distance | 400 m |
Average Link Budget | 6.1 dB |
TX Wavelength | 850 nm |
RX Wavelength | 850 nm |
Supported Data Rate | 1.25 Gbps - 11.32 Gbps |
Supported Ethernet Applications | 10G Ethernet (10.31Gbps), Gigabit Ethernet (1.25 Gbps) |
Supported Fiber Channel Applications | 10G Fiber Channel (10.52 Gbps), 1G Fiber Channel (1.0625 Gbps), 2G Fiber Channel (2.125 Gbps), 4G Fiber Channel (4.25 Gbps), 8G Fiber Channel (8.5 Gbps) |
SDH/SONET Standards | STM-64 (9.95Gbps) |
DDM/DOM | Supported |
Tx Wavelength Bandwidth | 20 nm (840-860 nm) |
Rx Wavelength Bandwidth | 20 nm (840-860 nm) |
Minimum Transmitting Power | -5 dBm |
Maximum Transmitting Power | 0 dBm |
Receiver Sensitivity | -11.1 dBm |
Receiver Overload | 0 dBm |
Dispersion | 110 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,RoHS,SFF-8431,SFP MSA |
Cisco compatible DS-SFP-FC4G-SW Datasheet
v3Complete technical specifications and product details
Cisco compatible DS-SFP-FC4G-SW Description
DS-SFP-FC4G-SW is a Cisco part number for a 4Gb Fibre Channel SW SFP used on Cisco MDS 4G SAN switches, including the MDS 9124 and MDS 9148 fabric switches, the MDS 9222i multiservice switch, and the MDS 9506, 9509 and 9513 directors fitted with 4G line cards. The module is an 850 nm VCSEL short-wave optic over duplex multimode fiber, built to the FC-PI-3 specification (T11.3 INCITS 373-2003) at 4.25 Gbps, with backward support for 2G FC (2.125 Gbps) and 1G FC (1.0625 Gbps) for mixed-rate SAN fabrics that still carry legacy storage arrays or tape libraries. FC-PI-3 gives better reach on lower-rate OM3 than 8G FC does: 380 m OM3, 500 m OM4, 150 m OM2 and 70 m OM1 at the ~8.0 dB link budget defined by the standard, which makes it a practical choice for inter-row SAN cabling where the fiber plant is already in place. The transceiver integrates an 850 nm PIN receiver, a duplex LC connector and SFF-8472 digital diagnostics (DDM/DOM) for real-time TX power, RX power, laser bias current, voltage and temperature readouts over the I2C management interface, which MDS NX-OS exposes through the 'show interface transceiver details' command.
EdgeOptic programs this unit with Cisco C-series EEPROM so MDS-OS and NX-OS accept it as a native Cisco DS-SFP-FC4G-SW without the 'service unsupported-transceiver' command, and the module reports as a Cisco part in Fabric Manager and Data Center Network Manager inventories. C-series coding is not interchangeable with Brocade B-series EEPROM used by Brocade/HPE StoreFabric FC switches, so this part targets Cisco MDS only and will not register correctly in Brocade FC fabrics. The module operates across 0 to 70 degrees Celsius (commercial), complies with the SFP MSA form factor per SFF-8074i, and is CE/RoHS certified. Fabric-side buffer-to-buffer credit sizing on Cisco MDS 4G line cards follows FC-PI-3 defaults, so no custom BB_Credit tuning is needed when the optic is swapped in.
For bulk SAN deployments, coding variants for specific MDS NX-OS releases, or mixed 1G/2G/4G link plans, contact our sales team and we will confirm firmware and line-card compatibility before dispatch.
Frequently Asked Questions
Which Cisco MDS switches accept the DS-SFP-FC4G-SW?
It targets Cisco MDS 4G SAN platforms: MDS 9124 and MDS 9148 fabric switches, MDS 9222i multiservice switch, and MDS 9506, 9509 and 9513 directors populated with 4G line cards. On any of these, Cisco C-series EEPROM lets the module register without 'service unsupported-transceiver'.
Why does 4G FC reach further on OM3 than 8G FC?
At the lower 4.25 Gbps line rate of FC-PI-3, modal dispersion on OM3 is less restrictive than at 8.5 Gbps FC-PI-4. The standard budget yields 380 m OM3 at 4G FC versus 150 m OM3 at 8G FC. That gives useful headroom for campus SAN runs and inter-row director links.
Will a Cisco-coded DS-SFP-FC4G-SW work in a Brocade FC switch?
No. Cisco C-series EEPROM is distinct from Brocade B-series coding used on Brocade/HPE StoreFabric FC switches, and the two vendors maintain separate vendor-ID whitelists. For a Brocade fabric, use a B-series-coded 4G or 8G FC SFP instead.