QSFP-40G-LR4 - Cisco 40 Gigabit Optical Modules QSFP 40GBASE-LR4 OTN Transceiver LC 10KM

Q1: What is the main difference between Cisco QSFP-40G-LR4 and QSFP-40G-LR4-S?

A: The primary difference is protocol support. The standard QSFP-40G-LR4 supports both enterprise Ethernet networks and OTN (Optical Transport Network) OTU3 data rates, offering maximum versatility for service providers. Conversely, the QSFP-40G-LR4-S (S-Class) is designed strictly for enterprise Ethernet applications and lacks OTN support. For standard enterprise data centers, the S-Class version is a budget-friendly option, while the standard LR4 offers the broadest compatibility profile.

Q2: Can I break out a 40G QSFP-40G-LR4 port into four 10G SFP-10G-LR ports?

A: No, you cannot use a breakout cable (such as an MPO-to-4xLC duplex) with the QSFP-40G-LR4 module to split it into 4x 10G links. This is because the QSFP-40G-LR4 uses an internal MUX/DEMUX to combine 4 distinct CWDM wavelengths onto a single single-mode fiber pair. If your application specifically requires breaking out a 40G single-mode port into 4x 10G SFP+ links, you must use a QSFP-40G-PLR4 (Parallel LR4) module which utilizes an MPO/MTP connector.

Q3: How do you guarantee the compatibility and quality of your third-party Cisco transceivers?

A: At LonRise, quality assurance is our top priority. Every single Cisco compatible module goes through a rigorous data center simulation testing process. This includes structural hardware checks, distance/attenuation performance testing, and live verification on native Cisco Catalyst and Nexus switches. This ensures 100% host system recognition, fully functional DOM diagnostics, and zero bit errors.

Q4: What are your warranty terms and after-sales customer service policies?

A: We provide an industry-leading 3-year warranty and lifetime expert technical support on all optical transceiver modules. If a product experiences any hardware or compatibility issues within the warranty window, we provide expedited free replacement or repair services. Our global customer support team guarantees a response time of under 12 hours to assist with any network integration or troubleshooting needs.