Juniper 1000BASE-LX SFP Transceiver — 550m MMF / 10km SMF Duplex LC

The Juniper 740-011614 is a 1000BASE-LX SFP transceiver delivering 1GbE over multi-mode fiber up to 550m or single-mode fiber up to 10km at 1355nm via duplex LC connector — the numeric part number equivalent to SFP-1G-LX-C, for use in Juniper EX, MX, QFX, and SRX platforms requiring flexible 1GbE fiber connectivity across both MMF and SMF infrastructure.

Key Features

• 1000BASE-LX SFP supporting both MMF (550m) and SMF (10km) fiber types
• 1355nm wavelength for compatibility with standard LX MMF and SMF fiber plants
• Duplex LC connector for standard fiber patch panel compatibility
• Juniper numeric part 740-011614 — equivalent to SFP-1G-LX-C alphanumeric variant
• Juniper-genuine for verified platform compatibility on EX, MX, QFX, SRX

Product Specifications

• Part Number: 740-011614
• Manufacturer: Juniper Networks
• Form Factor: SFP
• Speed: 1GbE (1000BASE-LX)
• Wavelength: 1355nm
• Connector: Duplex LC
• Fiber Type: Multi-Mode Fiber (MMF, up to 550m) or Single-Mode Fiber (SMF, up to 10km)

Transceiver & Interface Specifications

• Max Distance MMF: 550m (62.5µm OM1 or 50µm OM2)
• Max Distance SMF: 10km (OS1/OS2)
• TX Power: -11.5 to -3 dBm
• RX Sensitivity: -20 dBm (min)
• DDM/DOM: Yes
• Operating Temperature: 0°C to 70°C (commercial)

Use Cases

• 1GbE fiber connectivity across both legacy MMF (550m) and SMF (10km) infrastructure
• Campus or enterprise inter-building GbE links over single-mode fiber up to 10km
• Numeric part number procurement for LX SFP capacity on Juniper platforms
• Flexible fiber GbE port population in Juniper EX/QFX wiring closets with mixed fiber types

Compatibility

• Compatible with Juniper EX, MX, QFX, and SRX platforms with standard SFP GbE ports
• Supports both 62.5µm/50µm multi-mode and OS1/OS2 single-mode fiber with duplex LC connectors
• Fully interchangeable with SFP-1G-LX-C on supported Juniper platforms
• IEEE 802.3z 1000BASE-LX compliant

Frequently Asked Questions

What is the difference between 740-011614 and SFP-1G-LX-C?

Both are Juniper-genuine 1000BASE-LX SFPs with identical optical specifications — 740-011614 uses the numeric part number format, while SFP-1G-LX-C uses the alphanumeric format. Both are fully interchangeable on supported Juniper platforms.

Can the 740-011614 be used on both MMF and SMF in the same deployment?

Yes — the 1000BASE-LX specification supports both multi-mode fiber (up to 550m) and single-mode fiber (up to 10km) with the same transceiver. Note that when using OM1/OM2 MMF, a mode-conditioning patch cable (MCP) may be required to prevent modal noise at distances beyond 300m.

Does the 740-011614 support DDM monitoring?

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

The Juniper 740-011614 provides numeric part number access to Juniper's 1000BASE-LX SFP capability — delivering flexible GbE fiber connectivity across MMF (550m) and SMF (10km) infrastructure with the same Juniper platform compatibility and optical performance as the SFP-1G-LX-C alphanumeric variant.