StarTech.com Cisco GLC-ZX-SM-RGD Compatible SFP Module - 1000BASE-ZX - 1GbE SMF Transceiver

The GLCZXSMRGDST is a Cisco GLC-ZX-SM-RGD compatible fiber transceiver module that has been designed, programmed and tested to work with Cisco® brand switches and routers. It delivers dependable 1 GbE connectivity over fiber cable, for 1000BASE-ZX compliant networks, with a maximum distance of up to 70 km. This StarTech module offers enterprise-grade reliability and seamless interoperability, making it ideal for upgrading legacy networks, extending WAN links, or building scalable backbone infrastructure without vendor lock-in.

• Cisco-compatible, plug-and-play SFP: Engineered to match Cisco’s GLC-ZX-SM-RGD specifications, this module is designed, programmed and tested to work with Cisco switches and routers. It delivers factory-like performance with minimal deployment effort—no firmware hacks or complex configuration required. Its compatibility helps preserve network stability, reduces the risk of misconfiguration, and supports smooth migrations or uplinks between devices from different generations. This SFP is also compatible with other vendors’ equipment that adheres to the SFP MSA, enabling flexible network expansion without replacing existing gear.
• Long-range 1000BASE-ZX performance: Supports 1000BASE-ZX operation over single-mode fiber, enabling high-bandwidth, long-distance connectivity. Designed for campus backbones, data center interconnects, and remote site links, the module enables reliable 1 Gigabit Ethernet links across distances typical for ZX deployments—up to 70 km on SMF under ideal conditions. Its 1310 nm optical wavelength and precise transmitter/receiver specifications help maintain robust signal integrity across extended fiber runs, with low dispersion sensitivity and strong tolerance for standard telecom-grade fiber installations.
• Quality construction and reliability: Built to endure in demanding networking environments, this SFP features a rugged enclosure and an optimized thermal profile to minimize heat generation. It is RoHS-compliant and designed for long service life in industrial and data center deployments. The module is hot-swappable, allowing maintenance windows with minimal downtime. StarTech backs its modules with comprehensive support and warranty, offering peace of mind for mission-critical networks and large-scale upgrades.
• Digital Diagnostics Monitoring (DDM) support: Equipped with Digital Diagnostics Monitoring (DDM) capabilities that provide real-time visibility into optical parameters such as transmit power, receive power, temperature, and other critical metrics. DDM enables proactive monitoring, quicker fault isolation, and informed capacity planning. Admins can leverage these diagnostics to verify link health, optimize performance, and reduce the mean time to repair in managed networks with SFP-aware devices.
• Simple installation and compatibility: With an LC duplex fiber interface and standard SFP form factor, installation is straightforward—just insert the module into an available SFP slot and connect the corresponding single-mode fiber optic cable. The compact, hot-swappable design minimizes downtime and supports rapid scale-out of network infrastructure. The module’s proven compatibility with Cisco ecosystems and StarTech’s broad SFP portfolio helps simplify procurement, inventory, and maintenance across mixed-vendor environments.

Technical Details of StarTech.com Cisco GLC-ZX-SM-RGD Compatible SFP Module

• Data rate: 1 Gbps Ethernet
• Standard: 1000BASE-ZX
• Fiber type: Single-mode fiber (SMF)
• Wavelength: 1310 nm
• Distance: Up to 70 km on SMF (distance varies with fiber quality and link conditions)
• Connector: LC duplex
• Media type: Optical transceiver module (SFP)
• Interface compatibility: Compatible with Cisco GLC-ZX-SM-RGD and other SFP-enabled devices following the SFP MSA
• Power considerations: Low power consumption suitable for dense deployments
• Diagnostics: Digital Diagnostics Monitoring (DDM) supported
• Operating temperature (typical commercial range): 0 to 70°C
• Warranty: StarTech Limited Warranty

How to install StarTech.com Cisco GLC-ZX-SM-RGD Compatible SFP Module

• Power down the device (switch or router) before inserting or removing any SFP module to prevent damage.
• Insert the SFP module firmly into an available SFP slot until it seats with a click. Ensure the module is oriented correctly and fully seated.
• Connect a compatible single-mode fiber optic cable with LC duplex connectors to the SFP module.
• Power the device back on and allow the interface to initialize. Check the link status via the device’s management interface or console to confirm a successful connection.
• On devices that support Digital Diagnostics Monitoring (DDM), access the diagnostics data to monitor TX/RX power, temperature, and other parameters. Use this information to verify link health and to schedule maintenance if readings approach defined thresholds.
• If the link does not come up, reseat the module, verify the fiber connection, and test with a known-good fiber and a compatible transceiver to isolate the issue. Confirm that the device firmware supports SFPs of this model and that interfaces are configured correctly for 1000BASE-ZX operation.

Frequently asked questions

• Q: What devices is this SFP compatible with? A: It is designed to be compatible with Cisco GLC-ZX-SM-RGD transceivers and is tested to work with Cisco switches and routers. It is also compatible with other SFP-enabled hardware that adheres to the SFP MSA standard.
• Q: How far can I extend my network with this module? A: Up to 70 km on single-mode fiber under optimal conditions. Actual distance depends on fiber type, quality, connector integrity, and link budget.
• Q: Does this module support Digital Diagnostics Monitoring (DDM)? A: Yes, it supports DDM, enabling real-time monitoring of optical parameters to help maintain link quality and plan maintenance more effectively.
• Q: What connector type is used? A: The transceiver uses LC duplex connectors for single-mode fiber cables.
• Q: Is installation disruptive to network traffic? A: If performed during a planned maintenance window and with the device powered down prior to insertion, the installation is non-disruptive and quick thanks to its hot-swappable design.