How can I tell if my SFP is 1G or 10GB?

Small Form-Factor Pluggable (SFP) optical modules play a crucial role in modern networking environments, providing the flexibility and scalability necessary for efficient data transmission. Understanding the differences between 1G and 10G SFP modules is essential for network administrators and technicians to optimise network performance and ensure compatibility. In this blog post, we’ll delve into the fundamentals of SFP optical modules and explore various methods to distinguish between 1G and 10G SFPs.

Introduction to SFP Optical Modules

SFP optical modules, also known as Mini-GBIC (Gigabit Interface Converter), are hot-swappable transceivers commonly used in networking equipment. They facilitate the transmission of data over optical fibre cables and support various data rates and communication protocols, making them versatile components in modern networks.

What is a 1g SFP module?

A 1G SFP module, also known as a 1-gigabit small form-factor pluggable module, is a type of transceiver used in telecommunications and data communications for both telecommunication and data communications applications. It is designed to support communication over fibre optic or sometimes copper networking cables at speeds up to 1 gigabit per second (Gbps).There are many types of 1G SFP optical modules, mainly including single-mode and multimode. The single-mode optical module is suitable for long-distance transmission, while the multimode optical module is suitable for short-distance transmission. Additionally, there are differences between various brands and models of 1G SFP optical modules, such as the supported maximum distance, wavelength, interface type, etc., which need to be selected according to specific requirements.

What is a 10g SFP module?

The 10G SFP module, also known as a 10Gb small pluggable transceiver, is an upgraded version of the standard SFP module that supports data rates up to 10Gb per second. It usually consists of components such as packaging, interfaces, optical transceivers, and circuit boards, and transmits data between multimode and single-mode fibres through SFP + slots connected to network devices such as switches or routers. Compared with the 1G module, it is designed to handle larger bandwidths, making it very suitable for high-speed data transmission applications.

How to Differentiate Between 1G and 10G SFP+

Physical Identification

One of the primary methods to differentiate between 1G and 10G SFP modules is through physical identification. Manufacturers often label SFP modules with clear markings indicating their speed compatibility, such as “1G” or “10G”. These labels are typically located on the front or top surface of the module and provide a quick reference for identifying the speed rating.

Configuration Check

Another method involves checking the configuration settings of the SFP module within the networking device. Network administrators can access the device’s management interface and view the configured speed of the SFP port. This method provides direct insight into the operational speed of the SFP module.

Optical Power Detection

Optical power detection is a practical approach to differentiating between 1G and 10G SFP modules. By measuring the optical power output of the SFP module using a power meter or optical time-domain reflectometer (OTDR), technicians can determine whether the module operates at 1G or 10G speed. Higher optical power levels typically indicate 10G operation.

Spectrum Analysis

Spectrum analysis involves examining the spectral characteristics of the optical signal transmitted by the SFP module. Technicians can use optical spectrum analysers to analyse the frequency components of the signal and identify patterns associated with specific data rates, such as 1G or 10G. This method provides a comprehensive understanding of the SFP module’s operational characteristics.
In summary, differentiating between 1G and 10G SFP modules requires a combination of physical identification, configuration checks, optical power detection, and spectrum analysis. Network administrators and technicians should leverage these methods collectively to accurately identify the speed of SFP modules within their network infrastructure. By understanding the capabilities of SFP modules, organisations can optimise network performance and ensure seamless compatibility in diverse networking environments.


Mastering SFP management is crucial for robust, efficient networks. Knowing how to distinguish between 1G and 10G SFPs enables better network setup and performance. If you require assistance in selecting the most suitable product, feel free to consult our sales team for expert guidance.

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FS 10G BiDi SFP+ Transceiver Solution

FS 10G BiDi SFP+ transceiver offers a cost-effective solution for transmitting and receiving signals over a single-strand fibre. It effectively utilizes existing fibre deployments, maximizing capacity and bandwidth for 10 Gigabit Ethernet.

Figure 1: FS 10GBASE BiDi SFP+

Features and Specifications

Utilising WDM technology, FS 10G BiDi SFP+ transceiver features a single fibre port directly on the transceiver itself. This technology employs two distinct wavelengths: one for upstream and one for downstream communication, enabling bidirectional data transmission over a single fibre. FS 10G BiDi SFP+ transceivers are offered in four configurations: 1270nm-TX/1330nm-RX, 1330nm-TX/1270nm-RX, 1490nm-TX/1550nm-RX, and 1550nm-TX/1490nm-RX. Detailed parameters are outlined in the chart below:

WavelengthMax. Data RateAvailable DistanceConnectorOptical ComponentsDOM SupportProtocols
1270nm-TX/1330nm-RX10.3125Gbps10km, 20km, 40km, 60kmLC simplexDFB BiDiYesSFP+ MSA Compliant, CPRI, eCPRI
1330nm-TX/1270nm-RX10.3125Gbps10km, 20km, 40km, 60kmLC simplexDFB BiDiYesSFP+ MSA Compliant, CPRI, eCPRI
1490nm-TX/1550nm-RX10.3125Gbps80km, 100kmLC simplexDFB BiDiYesSFP+ MSA Compliant, CPRI, eCPRI
1550nm-TX/1490nm-RX10.3125Gbps80km, 100kmLC simplexDFB BiDiYesSFP+ MSA Compliant, CPRI, eCPRI

Note: BiDi transceivers must be used in pairs, which means if you use 1270nm-TX/1330nm-RX at one end, the other end of the link must be a 1330nm-TX/1270nm-RX transceiver.

Platform Support

FS 10G SFP+BiDi transceivers support multiple device brands including Cisco, Juniper, Brocade, Dell, Extreme, HW, Ciena, FS and other switch vendors.

FSS5850 SeriesT5850-48S6Q-R
CiscoWS SeriesWS-C4500X-24X-ES
CiscoWS SeriesWS-C3850-48XS-F-E
CiscoWS SeriesWS-X4904-10GE
CiscoNexus SeriesNexus 9000 N9K-C9396PX
CiscoNexus SeriesNexus 7000 N77-F348XP-23
CiscoASR SeriesASR 9000 A9K-RSP440-TR


FS BiDi SFP+ transceivers are designed for long-haul 10Gb links. Nowadays, many enterprises and campuses are using BiDi transceivers to replace the legacy duplex SFP+ transceivers. Especially for campus environments requiring fibre connectivity to a large number of endpoints, FS brings the solution. The following figure shows a common 10G link between SFP+ switches via BiDi SFP+ transceivers and an LC simplex cable.

Ordering Information

Plenty of 10G BiDi SFP+ transceivers inventory is available in FS global warehouses. Customised product compatible brand, transmission distance, and wavelength are provided. For more available brands or series of products, please check out the product page or contact your account manager.

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FS 10G XFP Transceiver Solution

FS offers a variety of 10G transceiver form factors, such as SFP+, XFP, X2, and XENPAK, catering to diverse 10G links. The 10G XFP transceivers are compatible with an extensive array of switches, routers, and other equipment from various vendors.

FS 10G XFP Transceiver FS 10G X2 Transceiver FS 10G XENPAK Transceiver

Figure 1: FS 10G XFP/X2/XENPAK Transceiver

Features and Specifications

FS 10G XFP transceivers come in various types: standard XFP transceivers, BiDi XFP transceivers, CWDM transceivers, DWDM transceivers, and DWDM tunable transceivers. All variants feature DOM capabilities. Below are the specifications for each transceiver form factor.

Table 1: Regular XFP Transceiver Specifications

Form FactorWavelengthMax Cable DistanceConnectorMediaOptical ComponentsProtocols
10G XFP SR850nm300m over OM3 MMFLC duplexMMFVCSEL 850nmSFP+ MSA Compliant, CPRI, eCPRI
10G XFP LRM1310nm220m over OM3 MMFLC duplexMMFFP 1310nmSFP+ MSA Compliant, CPRI, eCPRI
10G XFP LRM1310nm2kmLC duplexSMFFP 1310nmSFP+ MSA Compliant, CPRI, eCPRI
10G XFP LR1310nm10kmLC duplexSMFDFB 1310nmSFP+ MSA Compliant, CPRI, eCPRI
10G XFP ER1550nm40kmLC duplexSMFEML 1550nmSFP+ MSA Compliant, CPRI, eCPRI
10G XFP ZR1550nm80kmLC duplexSMFEML 1550nmSFP+ MSA Compliant, CPRI, eCPRI
10G XFP ZRC1550nm100kmLC duplexSMFEML 1550nmSFP+ MSA Compliant, CPRI, eCPRI

Table 2: BiDi/CWDM/DWDM XFP transceiver specifications

Form FactorWavelengthMax Cable DistanceConnectorMediaOptical ComponentsProtocols
10G BiDi XFP1270nm-TX/1330nm-RX;1330nm-TX/1270nm-RX10km, 20km, 40km, 60km, 80kmLC simplexSMFDFB BiDiSFP+ MSA Compliant, CPRI, eCPRI
10G CWDM XFP1270nm~1610nm20km, 40km, 80kmLC duplexSMFDFB CWDMSFP+ MSA Compliant, CPRI, eCPRI
10G DWDM XFPC17~C6140km, 80kmLC duplexSMFEML DWDMSFP+ MSA Compliant, CPRI, eCPRI

Platform Support

FS 10G XFP transceivers are compatible with a diverse array of equipment, encompassing Cisco, Juniper, Brocade, Dell, Extreme, HW, Ciena, FS and various other switch vendors. Below are listed some of the equipment models that FS 10G XFP transceivers support.

CiscoCisco ASR 9000 Series, Cisco 7600 Series, Cisco CRS Series, Cisco SCE8000 Series, Cisco SPA Series
JuniperJuniper MX960 Series
BrocadeBigiron RX Series, Netiron Series, Fastiron FGS Series, Netiron MLX Series, Netiron CES 2000 Series, Fastiron FESX Series, Fastiron X Series, Netiron CER 2000 Series

Ordering Information

Plenty of 10G XFP transceivers inventory is available at FS global warehouses. Apart from XFP transceivers, we also carry other form factors such as X2 and XENPAK. For further information on available brands or product series, please visit or reach out to your account manager.

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Telemetry and SNMP: Key Tools for Remote Monitoring and Management

In the realm of network management, telemetry and SNMP play crucial roles, yet they cater to different needs and handle distinct data types. Understanding their disparities can aid in selecting the appropriate tool for your monitoring and management requirements.

What Is Telemetry and SNMP in Networking?

Telemetry represents the next-generation network monitoring technology utilized for remotely gathering data from devices at rapid speeds. Devices periodically transmit device information to collectors, enabling real-time, high-speed, and precise network monitoring. Specifically, telemetry organizes data according to YANG models, encodes data in Google Protocol Buffers (GPB) format, and transmits it via the Google Remote Procedure Call (gRPC) protocol. This enhances data collection efficiency and fosters intelligent connectivity.On the other hand, the Simple Network Management Protocol (SNMP) serves as an Internet standard utilized for monitoring and managing IP-connected network devices such as routers, switches, firewalls, servers, and more. It retrieves and transmits data from these devices, facilitating network monitoring and fault detection, thereby ensuring seamless communication between monitored devices and the monitoring systems.

The Advantages of Telemetry and SNMP


  1. Fine-Grained Monitoring: Telemetry excels in collecting high-precision data types, offering a comprehensive reflection of the network’s status.
  2. Rapid Fault Localization: In complex networks, telemetry enables users to swiftly pinpoint faults within seconds or even sub-seconds.
  3. Proactive Data Reporting: With telemetry, a single subscription suffices for devices to continuously report data, reducing the burden of processing query requests on devices.


  1. Efficient Network Management: Network administrators can leverage the SNMP platform to perform tasks such as information querying, modification, and troubleshooting at any point on the network, thus enhancing efficiency.
  2. Device Compatibility: SNMP shields physical differences among various devices, enabling automated management of products from different manufacturers.

How Does Telemetry and SNMP Work?

Telemetry operates as a closed-loop automated operations system, often referred to as an intelligent operations system. It encompasses components such as network devices, collectors, analyzers, and controllers. The implementation of a telemetry system typically involves five stages:

  1. Subscription to Data Collection: Subscription to device data collection and pending data collection is initiated.
  2. Data Pushing: Devices transmit collected data to the collector based on the subscribed data method. The collector receives and stores this data.
  3. Data Reading: The analyzer reads the collected data stored within the collector.
  4. Data Analysis: The analyzer processes the collected data and forwards the analysis results to the controller for network configuration, management, and optimization.
  5. Network Parameter Adjustment: The controller deploys the adjusted network configuration to the devices. Once these configurations take effect, the devices report newly collected data to the collector. The analyzer evaluates whether the network optimization results meet expectations. Upon completion of the optimization process, the service concludes.

SNMP functions by transmitting Protocol Data Units (PDUs) to network devices configured to respond to SNMP requests. All communication is closely monitored, and network monitoring tools utilize GET requests to fetch data via SNMP. Traffic enters the network from diverse sources, and the Simple Network Management Protocol interacts with the entire network and its devices.SNMP comes pre-configured on devices and, once activated, stores performance statistics. Each network server hosts multiple Management Information Base (MIB) files. Monitoring data is accessed by querying the device’s MIB files, and SNMP’s operation revolves around its components, contributing significantly to resource management.

Telemetry vs. SNMP

HOW IT WORKSPush model continuously sends device operational data to management systemPolling mechanism collects device performance data and returns data to management platform
PROTOCOLS USEDUser Datagram Protocol or TCPUser Datagram Protocol
USE CASESCollecting high-resolution performance data, such as high-speed network interface statisticsRetrieving static data, such as inventory or neighbouring devices
BENEFITSSends data at higher rate; more efficient and practicalSimple protocol and easy to perform ad hoc data collection; widely supported by network devices and monitoring platforms
CHALLENGESTelemetry that relies on TCP connections can use large amounts of memoryManagement system repeatedly creates and sends data requests to each device


Telemetry and SNMP are integral tools for effective network monitoring and management. While Telemetry is more versatile and ideal for diverse applications, SNMP remains reliable for network-specific tasks. The right tool selection depends on the specific requirements and objectives of your network management and monitoring needs.FS provides cost-effective switches with SNMP support for efficient network management, suitable for various scenarios, such as S3400-48T6SP, S3400-24T4FP, S3260-16T4FP, S5500-48T6SP-R, etc. You can select and purchase FS switches based on your requirements.

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PoE Technology Trends in IoT

In today’s ever-evolving digital landscape, where the Internet of Things (IoT) is reshaping industries and everyday life, keeping pace with the forefront of technology is essential. One technology making a significant impact on IoT is Power over Ethernet (PoE). In this article, we’ll delve into a comprehensive understanding of PoE, explore its current applications, and unveil the pivotal technological trends shaping its role in the dynamic world of IoT.

Understanding PoE Technology

At the core of many IoT devices and applications lies Power over Ethernet (PoE) technology. But what exactly is PoE, and why is it pivotal in the IoT landscape?

Simplified PoE

Power over Ethernet, or PoE, is a technology enabling both power and data transmission over standard Ethernet cables. In the context of IoT, this means that IoT devices can be powered and connected to the network using a single cable. This technology streamlines installations and reduces the necessity for additional power sources, making it an ideal solution for a wide range of applications.

Key Components of PoE

To gain a thorough understanding of PoE, let’s break it down:

  • PoE Switches: These are network switches equipped with built-in PoE capabilities. They can provide power to PoE-enabled devices such as security cameras, access points, and sensors.
  • Injectors and Midspan Devices: These are standalone devices capable of adding PoE functionality to an existing network. They are valuable when upgrading a non-PoE network to support PoE devices.
  • PoE Devices: These are the IoT devices that can be powered and connected via PoE, eliminating the requirement for separate power sources.

Current Applications of PoE in IoT

PoE technology has found numerous applications in the world of IoT. Some of the most common applications include:

1. IoT Security Cameras:

PoE simplifies the installation of security cameras. With a single cable providing both power and data, cameras can be placed in more locations, enhancing security.

2. IoT Access Points:

Access points in wireless networks benefit from PoE, as it reduces the complexity of adding or relocating access points.

3. IoT Sensors:

Sensors used in various IoT applications can be powered and connected using PoE, streamlining their integration into the network.

Emerging Trends in PoE Technology

As technology continues to advance, PoE is not standing still. Several compelling trends are propelling the integration of PoE technology into cutting-edge IoT solutions, encompassing:

1. The rise of high-power PoE:

The introduction of the IEEE 802.3bt standard, often referred to as PoE++, has brought forth a groundbreaking power class capable of delivering a remarkable 90W through a single Ethernet cable. This breakthrough broadens the horizons for powering a diverse array of IoT devices, including high-power consumers such as smart displays, digital signage, and industrial sensors.

2. The development of PoE over long distances:

While conventional PoE systems can typically convey power over distances of up to 100 metres, contemporary PoE solutions extend this reach to several hundred metres, and in some cases, even kilometres. This advancement paves the way for the deployment of PoE in remote or hard-to-access locales, facilitating applications like outdoor security cameras and traffic monitoring systems.

3. The emergence of intelligent PoE systems:

PoE systems are evolving into increasingly sophisticated and intelligent ecosystems. This evolution opens the door to more streamlined power management and control. For instance, advanced PoE systems empower remote activation and deactivation of devices. Additionally, they enable dynamic adjustments in device power consumption based on real-time demand, resulting in heightened energy efficiency.

Future Prospects for PoE in IoT

The future of PoE in IoT looks promising. As 5G networks roll out and artificial intelligence (AI) continues to advance, PoE is poised to assume a more significant role. Consider these prospects:

  • 1. 5G and PoE in IoT
  • The expansion of 5G networks will propel the IoT’s growth, with PoE being essential in supporting the infrastructure required for high-speed, low-latency connectivity.
  • 2. AI Integration in PoE
  • AI-driven devices and applications stand to benefit from PoE’s capacity to simplify installations and offer centralized power and data management.

Challenges and Solutions

Despite its numerous benefits for IoT, PoE encounters challenges such as compatibility issues and power limitations. Fortunately, solutions exist to mitigate these challenges. For instance, employing midspan devices can adapt non-PoE networks, while opting for higher power PoE solutions can cater to devices with greater energy demands.


PoE emerges as a pivotal technology in facilitating the next generation of smart devices and services. Versatile, efficient, and cost-effective, PoE is well-suited for diverse IoT applications. As the IoT market expands, PoE is anticipated to assume an increasingly crucial role in enabling the next wave of smart devices and services.

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