1G SFP GLC-LH-SM-20 20km 1310nm Duplex LC/UPC Module, Cisco
Designed for enterprise access, campus, telecom edge and industrial network environments, the 1G SFP GLC-LH-SM-20 20km 1310nm Duplex LC/UPC Module, Cisco provides 1.25Gbps throughput in a SFP form factor. It operates at 1310nm over SMF through a Duplex LC/UPC connector and supports link lengths up to 20km. The module meets SFF-8472 MSA Compliant, IEEE 802.3ah-2004, IEEE 802.3z and includes digital diagnostic monitoring for live status readout.
Product Highlights
- SFP form factor, 1.25Gbps data rate
- Wavelength: 1310nm
- Connector: Duplex LC/UPC
- Reach: up to 20km
- Fiber media: SMF
- DDM/DOM: Supported
Specifications
| Cisco Compatible | GLC-LH-SM-20 |
|---|---|
| Manufacturer | HT |
| Form Factor | SFP |
| Max. Data Rate | 1.25Gbps |
| Wavelength | 1310nm |
| Max. Cable Distance | 20km |
| Connector | Duplex LC/UPC |
| Media | SMF |
| Transmitter Type | FP 1310nm |
| Receiver Type | PIN |
| TX Power | -9.5~-3dBm |
| Minimum Receiver Power | < -23dBm |
| Power Budget | 13.5dB |
| Receiver Overload | -3dBm |
| Power Consumption | ≤1W |
| Extinction Ratio | >9dB |
| DDM/DOM | Supported |
| Commercial Temperature Range | 0 to 70°C (32 to 158°F) |
| Protocols | SFF-8472 MSA Compliant, IEEE 802.3ah-2004, IEEE 802.3z |
Applications
The 1G SFP GLC-LH-SM-20 20km 1310nm Duplex LC/UPC Module, Cisco is used in enterprise access, campus, telecom edge and industrial network environments, where it provides a 1.25Gbps link over SMF up to 20km. The Duplex LC/UPC interface and 1310nm optics match the standard cabling plant used in modern data halls, so existing trunks can be reused. For networks standardized on Cisco hardware, it is a drop-in equivalent of the GLC-LH-SM-20.
Standards and Compatibility
On the compatibility side, this unit is the practical equivalent of the Cisco part GLC-LH-SM-20 and works in Cisco systems out of the box. Standards compliance covers SFF-8472 MSA Compliant, IEEE 802.3ah-2004, IEEE 802.3z.
Ordering Information
Order this product as SFP1G-ELX-31. Common models are stocked for fast dispatch. We can supply the module with neutral or customer-branded labels, and compatibility coding for a specific equipment vendor can be added at no extra process step.
Custom-made Fiber Products
As a manufacturer serving the fiber optic industry since 1995, we have strong in-house manufacturing and design capability. From early GBIC, Xenpak and X2 modules to today's SFP, SFP+, QSFP, QSFP-DD and OSFP products, we grow together with the industry. OEM and custom-designed transceivers and cables are welcome, and our factory-direct pricing is very competitive compared with online retail stores.
Delivery
Goods are normally sent by courier such as DHL, UPS, FedEx, TNT or EMS; air and sea freight are also available on request. Commonly used items are kept in stock for immediate shipment, and out-of-stock items are usually delivered within a few working days. We can also ship on your courier account or hand goods to your appointed forwarder.
Reliability Control
From incoming component inspection to final burn-in, quality is controlled at each step of production. Finished units are verified on real networking equipment in our compatibility lab, and test records are kept per batch so that any field question can be traced back quickly.
Packaging Options
Default packaging is simple and protective: sealed bag, blister tray, export carton. For OEM customers we also offer white-label packing, custom printed boxes and per-unit labeling with your own part numbers, so the goods can go straight into your sales channel.
