Juniper 40GBASE-LR4 QSFP+ Transceiver — 10km Single-Mode Fiber

The Juniper JNP-QSFP-40G-LR4 is a 40GBASE-LR4 QSFP+ optical transceiver delivering 40GbE over single-mode fiber up to 10km at 1310nm via duplex LC connector — Juniper-coded in JNP alphanumeric format, functionally equivalent to QSFPP-40G-LR4-C and 740-073095, for use in Juniper QFX, MX, and PTX platforms requiring 40G SMF connectivity.

Key Features

• 40GBASE-LR4 QSFP+ for 10km 40GbE over SMF — JNP alphanumeric part number format
• 4-lane LAN-WDM at 1310nm for 40G over standard OS1/OS2 single-mode fiber
• Duplex LC connector compatible with standard SMF LC patch panel infrastructure
• DDM/DOM support for real-time optical monitoring via Junos OS
• Juniper-coded for plug-and-play recognition on Juniper platforms

Product Specifications

• Part Number: JNP-QSFP-40G-LR4
• Manufacturer: Juniper Networks
• Form Factor: QSFP+
• Speed: 40GbE (40GBASE-LR4)
• Wavelength: 1310nm (4-lane LAN-WDM)
• Connector: Duplex LC
• Fiber Type: Single-Mode Fiber (SMF, OS1/OS2)

Transceiver & Interface Specifications

• Max Distance: 10km over OS1/OS2 SMF
• Data Rate: 4 x 10Gbps LAN-WDM lanes
• TX Power: -6.5 to +2.5 dBm per lane
• RX Sensitivity: -10.5 dBm (min)
• Power Consumption: Typically 3.5W
• DDM/DOM: Yes
• Operating Temperature: 0°C to 70°C (commercial)

Use Cases

• 40GbE SMF inter-switch links in Juniper QFX spine-leaf deployments up to 10km
• Service provider 40G aggregation and access links on Juniper MX or PTX
• Campus or enterprise inter-building 40GbE links over existing OS1/OS2 SMF
• JNP prefix procurement for 40GBASE-LR4 QSFP+ capacity on Juniper platforms

Compatibility

• Compatible with Juniper QFX, MX, and PTX platforms with QSFP+ 40G port slots
• Requires OS1/OS2 single-mode fiber with duplex LC connectors
• Interchangeable with QSFPP-40G-LR4-C and 740-073095 on supported Juniper platforms
• IEEE 802.3ba 40GBASE-LR4 compliant

Frequently Asked Questions

What is the difference between JNP-QSFP-40G-LR4, QSFPP-40G-LR4-C, and 740-073095?

All three are Juniper-genuine 40GBASE-LR4 QSFP+ transceivers with identical optical specifications. JNP-QSFP-40G-LR4 uses the JNP-prefix alphanumeric format, QSFPP-40G-LR4-C uses the QSFPP-prefix alphanumeric format, and 740-073095 uses the numeric format. All are interchangeable on supported Juniper platforms.

Can JNP-QSFP-40G-LR4 be used for 4x10GbE breakout?

No — 40GBASE-LR4 uses 4-lane LAN-WDM on a single duplex LC fiber pair and cannot be broken out into 4x10GbE. For 4x10GbE breakout, use 40GBASE-SR4 with MPO-to-LC fan-out cables over OM3/OM4 MMF.

Does the JNP-QSFP-40G-LR4 support DDM monitoring?

Yes — DDM/DOM is supported, enabling Junos OS to report real-time TX/RX optical power, temperature, voltage, and bias current for proactive transceiver health monitoring via CLI and SNMP.

The Juniper JNP-QSFP-40G-LR4 delivers 40GBASE-LR4 QSFP+ connectivity over 10km single-mode fiber in the JNP alphanumeric part number format — providing the same optical performance, DDM monitoring, and Juniper platform compatibility as the QSFPP-40G-LR4-C and 740-073095 variants for 40G SMF deployments on Juniper QFX, MX, and PTX platforms.