Cisco 1-Port 100BASE-ZX Fast Ethernet SFP Module

The Cisco 1-Port 100BASE-ZX Fast Ethernet SFP Module is a compact, hot-swappable transceiver designed to deliver long-haul 100 Mbps Ethernet over standard single-mode fiber. Engineered for reliability in campus networks, data centers, and WAN links, this SFP module enables extended fast Ethernet connectivity across distant sites with minimal cabling and downtime. With 100BASE-ZX technology, you can deploy robust, WAN-friendly links that maintain high performance without sacrificing simplicity. This module fits Cisco SFP ports and is compatible with a wide range of Cisco devices, delivering a seamless balance of efficiency, scalability, and cost-effectiveness for today’s distributed networks.

• Long-haul 100BASE-ZX connectivity up to 80 km on single-mode fiber, allowing links between distant buildings, campuses, and remote data centers without the need for repeaters or complex signal boosting. This long reach preserves signal integrity across metropolitan-area networks and branch office deployments while reducing fiber footprint and installation complexity.
• Hot-swappable SFP form factor for minimized downtime and effortless maintenance. This Cisco 1-Port SFP module installs into standard SFP slots in switches and routers that support SFP transceivers, enabling in-service upgrades and rapid replacement without powering down the equipment—ideal for network uptime and service continuity.
• Wavelength and optical performance optimized for reliability. The 100BASE-ZX solution uses a long-wavelength laser (typically 1550 nm) designed to achieve low attenuation and high optical signal integrity over long fiber spans, delivering dependable data transfer at 100 Mbps with robust error performance in real-world enterprise environments.
• Advanced diagnostics and management support. This module often includes Digital Diagnostics Monitoring (DDM/DOM) capabilities, providing real-time information on TX/RX power, temperature, supply voltage, and module status. Such visibility helps administrators preempt issues, perform proactive maintenance, and optimize link performance.
• Broad compatibility and Cisco-grade reliability. Built to integrate with Cisco devices and SFP-enabled switches and routers, the module offers dependable operation within Cisco ecosystems and is designed to meet the needs of mixed environments where Cisco gear coexists with other compatible SFP ports, preserving investment and simplifying network design.

Technical Details of Cisco 1-Port 100BASE-ZX Fast Ethernet SFP Module

• Product type: SFP Transceiver
• Data rate: 100 Mbps (100BASE-X)
• Wavelength: 1550 nm (ZX long-reach laser)
• Fiber type: Single-mode fiber (SMF)
• Distance: Up to 80 km
• Connector: LC duplex
• Standards: IEEE 802.3 100BASE-X; MSA-compliant
• Diagnostics: Digital Diagnostics Monitoring (DDM/DOM) supported
• Form factor: SFP; hot-swappable
• Operating temperature: 0°C to 70°C (commercial range)

How to Install Cisco 1-Port 100BASE-ZX Fast Ethernet SFP Module

• Prepare your device: Verify that your Cisco switch or gateway supports SFP transceivers and that the port is designated for a 100BASE-ZX module. Ensure the device is powered on if your environment requires hot-swapping or follow vendor guidelines for in-service replacement.
• Insert the SFP module: Hold the SFP by its edges and align it with the SFP slot. Push firmly until you hear a click or feel a latch secure the module in place. Avoid applying excessive force to prevent damage to the slot or module.
• Connect fiber correctly: Attach a single-mode fiber optic patch cord with LC connectors. Ensure the TX and RX fibers are correctly paired according to the link plan (use a standard straight-through SMF pair for most point-to-point links unless a dedicated crossover is specified by the device).
• Verify link and link-state: Power up and monitor the port status LEDs or use the device’s CLI to verify that the interface comes up at 100 Mbps and shows active link. If the link does not come up, recheck fiber orientation, connector cleanliness, and the remote end’s transceiver status.
• Confirm performance: Use the switch’s monitoring tools or CLI to review interface statistics, error counts, and duplex negotiation. If available, enable DOM/DDM to track real-time TX/RX power, temperature, and voltage for ongoing health checks.
• Document and test: Record the link distance, fiber type, and port configuration. Perform a basic throughput test to confirm steady 100 Mbps performance over the 80 km segment under typical traffic conditions.

Frequently asked questions

• Q: What is 100BASE-ZX and when should I use this Cisco SFP module?
  A: 100BASE-ZX is a 100 Mbps Ethernet standard designed to run over single-mode fiber for long-reach connections. Use this SFP module when you need reliable, long-distance fast Ethernet links—up to 80 km—between buildings, campuses, or WAN sites without upgrading to faster yet more expensive media.
• Q: Is this SFP module compatible only with Cisco devices?
  A: It is designed for Cisco SFP ports and Cisco-certified equipment, offering reliable interoperability within Cisco ecosystems. Many third-party devices that support standard SFP modules may also work, but always verify compatibility with your specific hardware before deployment.
• Q: What are the fiber and connector requirements?
  A: The module uses single-mode fiber (SMF) with LC duplex connectors. Ensure the fiber is properly terminated and clean, and that the link distance aligns with the 80 km maximum for ZX operation.
• Q: Does this module support diagnostics?
  A: Yes, Digital Diagnostics Monitoring (DDM/DOM) is supported on many Cisco SFP modules, providing real-time data on transmission power, temperature, and other operating parameters to help you monitor link health and schedule maintenance.
• Q: How do I know my link will reach 80 km?
  A: The 80 km distance is the typical reach on standard single-mode fiber with the ZX configuration, assuming appropriate optical budget and clean connectors. Real-world distance can be affected by fiber condition, connectors, and network components along the path.