Fiber Optic Total Solutions - Sun Telecom

EDFA play important role in optical communication networks, It provides high output power, high gain, wide frequency bandwidth, low power input, and low noise. This article will share some knowledge about EDFA. What is EDFA? An erbium-doped fiber amplifier (EDFA) is an optical repeater device that boosts the power of optical signals sent across fiber optic cables. An optical fiber is doped with the rare earth element erbium so that the glass fiber can absorb and emit light at another frequency. An EDFA uses the erbium-doped fiber as an optical amplification medium to enhance the signals directly. In addition, an EDFA can amplify multiple optical signals simultaneously and easily combined with WDM technology, which is used in the C band and L band in the range from 1530 to 1565 nm. How Does an EDFA Work? An EDFA consists of a length of Erbium-doped fiber (EDF), a pump laser, and a WDM combiner. The WDM combiner is for combining the signal and pump wavelength so that they can pro

As the application of optical fiber in network communication becomes more and more widespread, various optical fiber devices have emerged at the same time. A visual fault locator is one of the commonly used optical fiber inspection tools for troubleshooting network faults. This article will help you understand visual fault locators. What is a Visual Fault Locator? A visual fault locator (VFL) is a visible light source (LED or laser diode) that injects visible light energy into an optical fiber. VFL is a cost-effective way to spot defects in sharp bends, breaks, faulty connectors, and other faults which will "leak" red or green light visually. In addition, VFL locates the fault of the OTDR dead zone. Types of Visual Fault Locators VFLs 1)Pen-Type Visual Fault Locator A pen-type visual fault locator is small in size and easy to be carried away. It can be used to identify the connectors in patch panels, and the fibers during splicing operation, and locate sharp bends and

While setting up fiber Internet at your place of choice, you may come across an exhaustive list of abbreviations such as OLT, ONT, PON, and more. However, for simplicity, trying to understand all of them at once may get daunting. So first, let’s know the difference between OLT and ONT, which helps gauge your ISP’s services better. What are an OLT and ONT? An optical line terminal (OLT) is a device that serves as an internet service provider (ISP) endpoint of the passive optical network (PON). The OLT also provides the interface between a PON and ISP’s core network. Simply put, an OLT is ISP equipment. An optical network terminal (ONT) is a device that serves as the telecommunication chain’s endpoint of the PON on the end user. Simply put, an ONT is a user-side equipment. The Purpose of an OLT The OLT is a device located at the central hub of the ISP. It has a few purposes: 1. Control the information flowing upstream and downstream. 2. Convert the standard signals used by f

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Optical network terminal (ONT) plays a crucial role in bringing fiber optic internet to the home via the internet service provider. This article provides information about ONT. What is an ONT? ONT also known as the optical modem is a device that communicates directly with an internet service provider (ISP) to provide a fiber-optic internet connection in the home or office. It offers high-speed internet access, IPTV, voice, and Wi-Fi services. How Does ONT Work? The ONT converts fiber optic signals into copper and Ethernet wiring for use by the router. ONT is connected to the terminal point (TP) via fiber optic cable. A TP is a wall-mounted box where the fiber optic cable terminates in the home or office. An Ethernet cable is used to connect the ONT to the router. Benefits of ONT ONT provides a high-speed internet connection, high bandwidth, high reliability, high security, high flexibility, low cost, and easy management. Applications ONT is used in IPTV, voice, FTTH, FTTB,

An optical network unit (ONU) is used on the user side and designed to meet the requirements of the broadband access network. It provides high-speed internet access, voice, IPTV/CATV, and Wi-Fi service. This article provides some knowledge about ONU. What is ONU? ONU is the optical terminal device in the EPON (ethernet passive optical network) fiber access network, which provides users with multiple service interfaces. The network side of ONU is the optical interface (PON port, SC adapter), and the user side is the electrical interface (RJ45, CATV female). An ONU is divided into an active optical network unit and a passive optical network unit. The active optical network unit ONU is mainly used in the integration of the three networks. Passive optical network unit ONU is a user-side device of a GEPON (gigabit passive optical network) system and is used to terminate a service transmitted from an OLT through an EPON (passive optical network). How Does ONU Work? An ONU converts opt

ODC is a robust connector that withstands all installation hazards and does not allow handling errors. ODC connector makes installations more reliable and ensures high performance. This article provides some knowledge about ODC connectors. What is ODC Connector? An outdoor connector (ODC) is designed for fiber-to-the-antenna (FTTA) applications. It can withstand harsh environmental conditions when being used in outdoor applications. The ODC connector uses a threaded locking mechanism to ensure a safe and reliable connection and is designed with a guide pin, which can be connected and installed simply and quickly with one-handed blind mating. Features and Benefits ODC connector provides high reliability and high flexibility, small size, waterproof, dustproof, corrosion resistant, waterproof protection caps, EMI protection, and easy and cost-effective installation. Applications ODC connector is used in FTTA, FTTH, data centers, 3G/ 4G base stations, power utility, traffic automat

Coarse wavelength division multiplexing (CWDM) and dense wavelength division multiplexing (DWDM) are used for increasing the bandwidth of fiber by combining optical signals of different wavelengths on one strand of fiber. This article will discuss the differences between CWDM and DWDM. CWDM and DWDM are both effective solutions to solve the increasing bandwidth capacity of information transmission. But they differ from each other in many aspects. The below parts will discuss some differences between CWDM and DWDM. 1)Channel Spacing The channel spacing is the nominal difference in frequency or wavelength between two adjacent optical channels. CWDM has a wider channel spacing than DWDM. CWDM can transport 18 wavelengths with a channel spacing of 20nm in the spectrum grid from 1470 nm to 1610 nm. On the other hand, DWDM can carry 40, 80, 96, or up to 160 wavelengths with a narrower spacing of 0.8/0.4nm (100 GHz/50 GHz grid). Its wavelengths are from 1525nm to 1565nm (C band) and 15

DWDM is the ideal solution for networks that require high speeds, high channel capacity, and the capability of using amplifiers to transmit data across long distances. This article provides some basic information about DWDM. What is DWDM? Dense wavelength division multiplexing (DWDM) is a wavelength division multiplexing technology used to increase the bandwidth over existing fiber optic networks. The word "dense" here means the wavelength channels are very close to each other. In addition, DWDM works by combining and transmitting multiple signals simultaneously at different wavelengths on the same fiber. DWDM Operating Principle According to ITU standards, DWDM has 100GHz (0.8nm) wavelength spacing for 40 channels or 50GHz (0.4nm) spacing for 80 channels. DWDM System Components A DWDM system consists of five components: optical transmitters/receivers, DWDM Mux/Demux filters, optical add/drop multiplexers (OADMs), optical amplifiers, and transponders (wavelength conv

Fiber optic switch plays a crucial role in fiber optic network. It is a high-speed network transmission relay device and uses fiber optic cables as a transmission medium compared to common switches. This article will help you understand fiber optic switches. What is a Fiber Optic Switch? A fiber optic switch is a device that facilitates communication control among devices and selects the path of light signals for data transmission over a network. It has RJ45 ports and SFP slots, electrical interfaces support 10/100/1000Mbps, full/half duplex mode, and MDI/MDIX (POE function optional). In addition, the fiber optic switch is made of aluminum alloy to achieve a protection rating of IP40. Fiber Optic Switch Types There are two types of fiber optic switches: managed and unmanaged. A managed fiber optic switch provides flexibility to the network administrator to control, manage, and prioritize local area network (LAN) traffic. An unmanaged fiber optic switch works like a plug-and-pla

Wavelength division multiplexing (WDM) is a technology for transporting large amounts of data between sites. It increases bandwidth by allowing different data streams to be sent simultaneously over a single optical fiber network. There are two main types of WDM systems: coarse wavelength division multiplexing (CWDM) and dense wavelength division multiplexing (DWDM). This article provides some knowledge about CWDM. What is CWDM? Coarse Wavelength Division Multiplexing (CWDM) is a wavelength multiplexing technology for cities and access networks. The word coarse means the wavelength spacing between channels is relatively large. Furthermore, CWDM is an ideal solution for short-range applications and is used to improve the transmission capacity of optical fiber and the utilization of optical fiber resources. CWDM Operating Principle CWDM was standardized by the ITU-T G.694.2 based on a grid or wavelength separation of 20 nm in the range of 1270-1610 nm. It can carry up to 18 CWDM wav

Ethernet passive optical networking (EPON) and gigabit passive optical network (GPON) are variations of PON. EPON and GPON were developed by the IEEE and ITU-T to enable gigabit rate solutions to deliver Ethernet and IP services. This article will discuss the difference between EPON and GPON. EPON VS. GPON The difference between EPON and GPON can be illustrated from the following aspects. (1)Data Rate EPON is defined by IEEE 802.3 standard, ratified as 802.3ah-2004 for 1.25 Gbps (1.0 Gbps before 8B/10B coding) and IEEE 802.3av standard for 10Gbps (10G-EPON). The upstream and downstream data rate of EPON is symmetrical. GPON supports a variety of data rate levels including asymmetric uplink and downlink rates, downlink 2.5Gbps or 1.25Gbps, uplink 1.25Gbps or 622Mbps. Users can choose the upstream and downstream data rate based on their needs, making it more flexible than EPON. (2)Split Ratios EPON supports a minimum split ratio of 1:32, also it can support higher split ratios o