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ProductsCisco Compatible GLC-EX-SMD / GLC-LH-SM-40 | 1G SFP EX 1310nm 40km
SFP-GE-EX
CISCO Compatible Modules

Cisco Compatible GLC-EX-SMD / GLC-LH-SM-40 | 1G SFP EX 1310nm 40km

Buy Cisco compatible GLC-EX-SMD and GLC-LH-SM-40 SFP transceivers, 1G 1310nm modules up to 40km over SMF. Optional DOM support, fully tested and reliable.

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Cisco Compatible GLC-EX-SMD / GLC-LH-SM-40 SFP Transceiver | 1GBASE-EX, LC Duplex, SMF (40km)

Product Overview

The Cisco Compatible GLC-EX-SMD and GLC-LH-SM-40 SFP Transceivers are high-performance 1Gbps single-mode optical modules designed for extended-distance transmission up to 40 kilometers over single-mode fiber (SMF). Operating at a 1310nm wavelength, these modules are ideal for long-range enterprise networks, metro access, and telecom infrastructure.
The GLC-EX-SMD model includes Digital Optical Monitoring (DOM/DDM) functionality for real-time diagnostics, while GLC-LH-SM-40 serves as a cost-effective extended-reach LX/LH alternative without monitoring.
Both modules are fully compatible with Cisco platforms and provide reliable, long-distance connectivity at a competitive cost.


Key Features

  • Supports 1Gbps data rate (1000BASE-EX)
  • 1310nm DFB laser for single-mode fiber
  • Up to 40km transmission over SMF
  • LC duplex connector interface
  • Hot-pluggable SFP form factor
  • Fully compatible with Cisco SFP ports
  • Low power consumption
  • MSA compliant and fully tested
Variant Highlights:
  • GLC-EX-SMD: Supports DOM/DDM monitoring
  • GLC-LH-SM-40: Cost-effective 40km solution without DOM


Technical Specifications

General Parameters
  • Form Factor: SFP
  • Data Rate: 1Gbps
  • Wavelength: 1310nm
  • Transmission Distance: Up to 40km
  • Connector: LC Duplex
  • Fiber Type: Single-Mode Fiber (SMF)
Optical Characteristics
  • Transmitter Type: DFB Laser
  • Receiver Type: PIN Photodiode
  • TX Power: -3 ~ +2 dBm
  • RX Sensitivity: ≤ -24 dBm
Electrical & Environmental
  • Power Consumption: ≤ 1W
  • Operating Temperature: 0°C to 70°C (Industrial options available)
  • Storage Temperature: -40°C to 85°C
Additional Features (GLC-EX-SMD)
  • Digital Optical Monitoring (DOM/DDM):
  • TX/RX optical power monitoring
  • Temperature & voltage monitoring
Compliance
  • IEEE 802.3z (1000BASE-EX)
  • SFP MSA compliant
  • RoHS compliant


Applications

  • Long-distance enterprise backbone networks
  • Metro and access networks
  • Telecom infrastructure
  • Campus interconnection across large distances
  • Switch-to-switch long-range links


Model Comparison

Model
Distance
DOM/DDM
Use Case
GLC-EX-SMD
40km
✅ Yes
Monitoring & diagnostics
GLC-LH-SM-40
40km
❌ No
Cost-sensitive deployments


Why Choose This Product

The Cisco-compatible GLC-EX-SMD / GLC-LH-SM-40 modules are designed for reliable long-distance 1G connectivity. They offer:
  • Stable transmission up to 40km
  • Cost-effective alternative to OEM optics
  • Flexible options with or without monitoring
  • Proven performance in telecom and enterprise networks
They are ideal for extending network reach without upgrading to higher-speed infrastructure.


When to Choose These Modules

Choose this EX/LH-40 series if:
✔ Distance requirement is up to 40km ✔ Using single-mode fiber (SMF) ✔ Need reliable long-distance 1G connectivity
Choose specific models based on needs:
  • GLC-EX-SMD → Need real-time monitoring
  • GLC-LH-SM-40 → Budget-focused deployment
Choose LX/LH 10km modules if:
✔ Distance is ≤10km ✔ Lower cost and power consumption are preferred




Cisco compatible GLC-EX-SMD, GLC-LH-SM-40, 1G SFP EX module, 1000BASE-EX transceiver, Cisco SFP 40km 1310nm, LC SMF SFP long distance