Cisco GLC-EX-SMD= SFP Transceiver
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Cisco GLC-EX-SMD 1GBPS SFP Mini-GBIC Transceiver Bulk

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Short Description:
GLC-EX-SMD= 1 Gigabyte Per Second (GBPS) 1000Base-EX Single-Mode Fiber 40km 1310 Nanometer (NM) Optical Network Full-Duplex LC Connector Small Form-Factor Pluggable (SFP) Transceiver Module | Made by Cisco | New Bulk Pack
Product Condition:
New Bulk Pack
Warranty provided by ALLHDD.COM:
90 Days
Understanding the GLC-EX-SMD 1GBPS SMF Optical Network Transceiver

GLC-EX-SMD, also known as 1000Base-EX, is a type of optical network technology capable of transmitting data at a rate of 1 Gigabyte per second (GBPS). It utilizes Single-Mode Fiber (SMF) for transmission, covering distances up to 40 kilometers. This technology operates at a wavelength of 1310 Nanometers (NM) and employs Full-Duplex communication, allowing simultaneous transmission and reception of data. GLC-EX-SMD utilizes LC connectors and is typically implemented using Small Form-Factor Pluggable (SFP) transceiver modules.

Exploring 1000Base-EX

1000Base-EX is a standard for Gigabit Ethernet over optical fiber. It specifies the parameters and characteristics necessary for transmitting data at a rate of 1 Gigabyte per second over long distances using Single-Mode Fiber (SMF). The "EX" designation indicates extended reach, highlighting its ability to cover distances up to 40 kilometers without signal degradation.

Overview of the Cisco GLC-EX-SMD SFP Transceiver Module
  • 1 Gigabyte Per Second (GBPS) Capability: The GLC-EX-SMD operates at an impressive data transfer rate of 1 Gbps. This high speed makes it suitable for demanding networking applications, ensuring efficient and swift data communication within a network.
  • 1000Base-EX Standard: The GLC-EX-SMD adheres to the 1000Base-EX standard, which is part of the IEEE 802.3ab Ethernet standard. This standard specifies the physical layer attributes for Gigabit Ethernet over optical fiber. In the case of GLC-EX-SMD, it is optimized for Single-Mode Fiber connectivity.
  • Single-Mode Fiber (SMF) Technology: The GLC-EX-SMD is designed to work with Single-Mode Fiber, a type of optical fiber with a small core diameter that allows only one mode of light to propagate. This ensures that the module can transmit data over longer distances with minimal signal loss, making it ideal for deployments where long-distance communication is crucial.
  • 40km Reach: One of the standout features of the GLC-EX-SMD is its impressive reach of 40 kilometers. This long-distance capability makes it suitable for applications that require data transmission over extensive network infrastructures, such as metropolitan area networks (MANs) and long-distance connections between data centers.
  • 1310nm Wavelength: The GLC-EX-SMD operates at a wavelength of 1310nm. The choice of wavelength is significant as it impacts the performance and distance capabilities of the module. In this case, the 1310nm wavelength strikes a balance between signal integrity and distance, contributing to the module's ability to transmit data over the specified 40-kilometer range.
  • Duplex LC Connector: The GLC-EX-SMD is equipped with a Duplex LC Connector, a standard connector type used in fiber optic communications. The duplex configuration enables bidirectional communication by using two fibers – one for transmitting data and the other for receiving data. This connector type is widely adopted in networking environments for its reliability and efficiency.
  • Small Form-Factor Pluggable (SFP) Form Factor: The GLC-EX-SMD follows the Small Form-Factor Pluggable (SFP) standard. The SFP form factor is a compact and hot-swappable design that allows for easy installation and replacement of transceiver modules in networking devices such as switches and routers. This flexibility is valuable in scenarios where scalability and adaptability are essential.
Versatility in Network Configurations

GLC-EX-SMD's compatibility with the 1000Base-EX standard ensures seamless integration into diverse network architectures. Whether used in data centers, telecommunications networks, or enterprise setups, the module adapts to different environments, providing consistent and reliable performance.

Working Principle of GLC-EX-SMD Transceivers

GLC-EX-SMD transceiver modules operate based on the principles of optical communication. Here's how they work:

  • Optical Transmission: The transceiver module converts electrical signals from the networking device into optical signals using a laser diode. These optical signals are then transmitted through the single-mode fiber optic cable.
  • Signal Reception: When receiving data, the module detects incoming optical signals using a photodetector. The photodetector converts the optical signals back into electrical signals, which are then processed by the networking device.
  • Wavelength and Modulation: The module operates at a specific wavelength of 1310nm, which is optimized for transmission over single-mode fiber. Additionally, the data is modulated onto the optical carrier using techniques such as amplitude or phase modulation.
Enhanced Data Transfer Speed

With a data transfer rate of 1 Gbps, GLC-EX-SMD facilitates high-speed communication, meeting the demands of modern networking applications. The ability to transmit data at this rate ensures smooth and efficient operations, supporting bandwidth-intensive tasks and applications.

Future-Proofing Networks with GLC-EX-SMD

As networking technologies continue to evolve, the GLC-EX-SMD's compatibility with established standards and its versatility position it as a future-proof solution. Organizations investing in this transceiver module can be confident in its ability to meet the evolving demands of network infrastructure.

Benefits of GLC-EX-SMD Transceivers

The use of GLC-EX-SMD transceiver modules offers several benefits to network operators and organizations:

High Performance

These modules support gigabit-speed data transmission over long distances, ensuring reliable and efficient communication.


GLC-EX-SMD modules are compatible with a wide range of networking equipment, including switches, routers, and media converters, from various vendors.


Organizations can easily scale their network infrastructure by adding or replacing GLC-EX-SMD modules as needed, without requiring significant changes to existing hardware.


Despite their high performance, GLC-EX-SMD transceivers are relatively affordable compared to other optical networking solutions, making them a cost-effective choice for organizations with budget constraints.


These modules are built to withstand harsh environmental conditions and operate reliably in demanding network environments, ensuring continuous connectivity.

Applications of GLC-EX-SMD

The GLC-EX-SMD finds applications in various networking scenarios where high-speed, long-distance communication is crucial. Some notable applications include:

Data Center Interconnects

The module's 40km reach and high data transfer rate make it suitable for connecting data centers that are geographically separated. This is particularly valuable in scenarios where redundancy and disaster recovery planning require reliable and fast interconnectivity.

Metropolitan Area Networks (MANs)

GLC-EX-SMD is well-suited for MANs where communication needs to span across a city or metropolitan area. Its long reach and high-speed capabilities make it an ideal choice for such networking infrastructures.

Telecommunication Networks

Telecommunication service providers can leverage the GLC-EX-SMD to extend their network reach, especially in scenarios where laying new physical cables might be impractical or cost-prohibitive. The module facilitates the expansion of high-speed communication services over existing optical fiber networks.

Enterprise Networks

In enterprise-level networks, the GLC-EX-SMD can be employed to connect buildings or offices over considerable distances, ensuring seamless and reliable communication between different locations within an organization.

General Information of the Cisco GLC-EX-SMD= SFP Transceiver Module
  • Manufacturer: Cisco
  • Part Number or SKU# GLC-EX-SMD=
  • Product Name: 1000Base-EX SFP Module
  • Product Type: Transceiver Module
Technical Information for 1000Base-EX SFP Module
  • Form Factor: SFP (mini-GBIC)
  • Date Rate: 1.25/1.0625Gbps
  • Application/Usage: Data Networking
  • Application/Usage: Optical Network
  • Interfaces/Ports: 1 x 1000Base-EX
  • Interfaces/Ports Details: 1 x 1000Base-EX Network
Performance of GBIC-SFP Plug-in module
  • Maximum Data Transfer Rate: 1.25 GBPS
  • Max Transfer Distance: 40 km (24.8 mi)
  • Wavelength: 1310nm
  • Fiber Operating Mode: Full-Duplex
  • DDM: Yes
  • Compatible Networks: 1000 Mbps (1 Gbps)
  • MTBF: 3,013,496 hours
  • Power Consumption (In Watts): < 1 W
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In general, the GLC-EX-SMD technology offers high-speed and reliable optical networking capabilities, making it suitable for a wide range of applications across industries. With its 1 Gigabyte per second data rate, extended reach, and compatibility with existing infrastructure, GLC-EX-SMD provides an effective solution for building robust and scalable networks to meet the demands of modern digital communication.

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