QSFP-40G-LR4-S Cisco Compatible 40GBASE-LR4 QSFP+, 1310nm, 10km SMF, LC
Cisco compatible QSFP-40G-LR4-S - Key Features
- Compatibility: Cisco
- Media Type: Single-Mode Fiber (SMF)
- Connector: Double LC/UPC
- Fiber Count: Duplex
- Maximum Distance: 10 km
- Average Link Budget: 6.6 dB
- Tx Wavelength: CWDM 4 Ch
- Supported Data Rate: 44.8 Gbps
- DDM/DOM: Supported
- Temperature Range: Standard 0°-70°C
Cisco QSFP-40G-LR4-S Price
Cisco compatible QSFP-40G-LR4-S Specifications
Form Factor | QSFP+ |
Modulation | NRZ (Non-Return to Zero) |
Media Type | Single-Mode Fiber (SMF) |
Connector | Double LC/UPC |
Fiber Count | Duplex |
Maximum Distance | 10 km |
Average Link Budget | 6.6 dB |
TX Wavelength | 4-channel CWDM (1271/1291/1311/1331 nm) |
RX Wavelength | 4-channel CWDM (1271/1291/1311/1331 nm) |
Supported Data Rate | 44.8 Gbps |
Supported Ethernet Applications | 40G Ethernet (41.25Gbps) |
Optical Transport Network (OTN) Applications | OTU3 (43.01Gbps), OTU3e2 (44.58Gbps) |
SDH/SONET Standards | STM-256 (39.81 Gbps) |
DDM/DOM | Supported |
Transmitter Type | DFB Laser |
Tx Wave Bandwidth | 4 WDM Seperated 1310nm Lanes (13 nm (1271, 1291, 1311, 1331)) |
Average Launch Power (Min) Each Lane | -6 dBm |
Average Launch Power (Max) Each Lane | 3 dBm |
Receiver Type | PIN photodiode |
Average Receiver Sensitivity (Min) Each Lane | -12.6 dBm |
Average Receiver Sensitivity (Max) Each Lane | 3 dBm |
Receiver Overload | 3 dBm |
Temperature Range | Standard 0°-70°C |
Storage Temperature | -40° to 85°C |
Relative Humidity | 5 to 85% |
Power | +3.3V single power supply |
Compliance | IEEE 802.3ba, CE, Class 1 FDA and IEC60825-1 Laser Safety Compliant, INF-8438i, QSFP+ MSA, RoHS, SFF-8436 |
Cisco compatible QSFP-40G-LR4-S Datasheet
v2Complete technical specifications and product details
Cisco compatible QSFP-40G-LR4-S Description
EdgeOptic's QSFP-40G-LR4-S compatible is a Cisco-coded Ethernet version of the EdgeOptic 40G-QSFP-10 multi-vendor 40GBASE-LR4 transceiver. It carries Cisco-recognized EEPROM, so Cisco switches read it as a native module and the "service unsupported-transceiver" command is not required on IOS XE or NX-OS.
The module runs four CWDM lanes at 1271, 1291, 1311 and 1331 nm, multiplexed onto a single duplex LC over single-mode fiber for reach up to 10 km. A DFB laser drives each lane and a PIN photodiode receives, with per-lane launch power between −6 dBm and +3 dBm and receiver sensitivity of −12.6 dBm per lane. The 6.6 dB link budget covers a standard 10 km G.652 span with margin. Digital optical monitoring reports temperature, supply voltage, bias current, and per-lane optical power.
The Cisco QSFP-40G-LR4-S is the S-class Ethernet variant. It carries 40GBASE-LR4 Ethernet and does not run OTU3 or other OTN rates. If a deployment needs OTU3 multirate transport, the QSFP-40G-LR4 (no -S suffix) is the part to specify, not this one. Don't swap the two part numbers during procurement. The QSFP-40G-LR4-S= ordering code is Cisco's spare PID for the same optic; both forms refer to the same module.
This optic is built to the IEEE 802.3ba Clause 87 40GBASE-LR4 standard and the QSFP+ MSA (SFF-8436, INF-8438i). It operates from 0 to 70 degrees C. For switch-line-card and chassis support, verify the part against the Cisco Transceiver-to-Device Compatibility Matrix for your platform and software release before deployment.
Backed by 15+ years of EdgeOptic compatibility engineering across vendor optical platforms. Ships next business day from EU stock with a lifetime warranty. For volume pricing or qualification support, contact our sales team.
Frequently Asked Questions
What is the difference between QSFP-40G-LR4-S and QSFP-40G-LR4?
The QSFP-40G-LR4-S is the Cisco S-class Ethernet variant and carries 40GBASE-LR4 Ethernet only. The QSFP-40G-LR4 (no -S suffix) is the multirate sibling that also supports OTU3. Both share the same optics, four CWDM lanes, 10 km reach, and duplex LC, so for Ethernet-only switching the -S part is the correct order. Specify the non-S part only when a platform line card needs OTU3 transport.
Does the Cisco QSFP-40G-LR4-S compatible need the service unsupported-transceiver command?
No. EdgeOptic codes this compatible with Cisco-recognized EEPROM, so IOS XE and NX-OS accept it as a native optic without the service unsupported-transceiver command. Confirm switch and software-release support against the Cisco Transceiver-to-Device Compatibility Matrix for your platform.