Q1: What is an SFP-1G-LX module?
A: The SFP-1G-LX module is a Small Form-factor Pluggable (SFP) transceiver designed for 1 Gbps (Gigabit Ethernet) communication over single-mode fiber (SMF), using a 1310 nm wavelength.
Q2: What does the model code "SFP-1G-LX" mean?
A: Small Form-factor Pluggable modular interfaceSupports 1 Gbps (1000 Mbps) data rateLong-range transmission, using 1310 nm wavelength over single-mode fiber
Q3: What is the maximum supported transmission distance?
A: Typical maximum distance is 10 km over SMF at 1310 nm; some high-optical-budget variants can reach 20 km.
Q4: Can the SFP-1G-LX module work over multi-mode fiber (MMF)?
A: Yes, it can operate over MMF (up to ~550 m) with a mode-conditioning patch cord, though it is optimized for SMF.
Q5: What connector type does SFP-1G-LX use?
A: It uses a duplex LC connector for fiber interfaces.
Q6: Is SFP-1G-LX compatible with all brands of networking equipment?
A: Yes, it complies with the MSA SFF-8477 standard, making it compatible with major brands like Cisco, Juniper, Arista, Huawei, HP, Dell, etc.
Q7: Does SFP-1G-LX support hot-swapping?
A: Yes, it is hot-plug capable, allowing insertion or removal without powering off the switch or router.
Q8: What is the typical power consumption?
A: Power consumption is typically < 1.3 W, often around 1.0 W or less depending on vendor.
Q9: Does the module support Digital Diagnostic Monitoring (DDM/DOM)?
A: Yes, most SFP-1G-LX modules support DDM (SFF-8472), enabling real-time monitoring of optical parameters like power, temperature, voltage, etc.
Q10: Can SFP-1G-LX operate in multi-rate devices or Mixed-speed slots?
A: Typically it's fixed at 1 Gbps. Some modules support dual rate (1.25 Gbps) for Fibre Channel and Ethernet usage, but do not auto-negotiate down to 100 Mbps.
Q11: What is the operating temperature range of SFP-1G-LX modules?
A: Standard commercial modules operate from 0 C to 70 C, while industrial-grade versions may support 40 C to 85 C.
Q12: How can I verify compatibility with my networking device?
A: Check the device's documentation for supported modules. If it supports generic 1000BASE-LX SFP and not locked to vendor-branded optics, you can use a Multi-Source Agreement compliant module.
Q13: What applications are typical for SFP-1G-LX modules?
A: Common in campus backbone links, inter-building connections, metro and ISP networks, enterprise LANs, SAN backplanes, and telecom-grade deployments.
Q14: What IEEE standard defines SFP-1G-LX functionality?
A: It adheres to IEEE 802.3z clause for 1000BASE-LX/LH, specifying 1310 nm operation up to ~5 km (standard), extended to ~10 km ("LX10"/LH).
Q15: Are there variants of SFP-1G-LX offering longer reach?
A: Yes, certain 20 km variants (1310 nm, FP laser) are available which exceed standard 10 km reach when using high optical budget SMF.