Cisco GLC-LH-SM 1000BASE-LH SFP Transceiver Module Refurbished
Every WhaleyComm unit is professionally tested, reset to factory defaults, and certified by our in-house engineers — the same standard trusted by 5,000+ organisations across 25 years. Not a refurb marketplace. A certified lifecycle partner.
Tested to factory specification. Backed by 25 years of enterprise trust.

Cisco GLC-LH-SM 1000BASE-LH/LX SFP Transceiver Module
Tested to factory specification. Backed by 25 years of enterprise trust.
The Cisco GLC-LH-SM is a 1000BASE-LH Small Form-factor Pluggable (SFP) transceiver module designed for high-performance Gigabit Ethernet applications over single-mode fiber. Operating at 1310nm wavelength, this SFP supports link lengths up to 10km on standard single-mode fiber (SMF), making it an ideal solution for enterprise campus and data center interconnects. Compatible with a wide range of Cisco Catalyst, Nexus, and ASR platforms, this transceiver delivers reliable, standards-based connectivity for your network infrastructure.
Product Details
- MPN: GLC-LH-SM
- Vendor: Cisco
- Product Type: Optics / SFP Transceiver
- Condition: Refurbished – Professionally restored and tested
- Connector Type: LC Duplex
- Wavelength: 1310nm
- Max Distance: Up to 10km on SMF (G.652)
- Data Rate: 1.25 Gbps (1000BASE-LH/LX)
- Compatible Fiber: Single-Mode Fiber (SMF)
- Form Factor: SFP (Small Form-factor Pluggable)
Refurbished Quality You Can Trust
Every WhaleyComm refurbished unit undergoes rigorous inspection and testing to ensure it meets or exceeds original factory specifications. Our certified technicians thoroughly clean, test, and verify full functionality before shipment — so you get enterprise-grade performance at a fraction of the cost of new. Don't let the word "refurbished" fool you: this is a battle-tested, production-ready optic.
Lifetime Warranty
No Time Limits. No Questions Asked. Every WhaleyComm unit ships with a Lifetime Warranty. If it fails under normal operating conditions at any point, we replace it. That's the WhaleyComm promise — backed by 25 years of experience and 5,000+ satisfied customers across the enterprise networking industry.
Shipping & Returns
- Shipping: Orders ship within 1–2 business days.
- Returns: Contact support for DOA or warranty issues. We make it right — fast.
Why Choose WhaleyComm?
- ✅ Factory-spec tested optics
- ✅ Lifetime warranty on every unit
- ✅ 25 years of enterprise networking expertise
- ✅ Trusted by 5,000+ customers worldwide
- ✅ Fast 1–2 business day shipping
- ✅ Significant savings vs. new Cisco list price
Whether you're expanding your network, replacing a failed module, or stocking spares, the Cisco GLC-LH-SM from WhaleyComm delivers the reliability and performance your infrastructure demands — at a price that makes sense.