In-depth analysis of application specifications for optical fiber cabling in optical fiber access networks

The optical fiber access network has a lot to learn about. Here we mainly introduce the application specifications of optical fiber cabling in the optical fiber access network. As fiber access networks have been widely used in China only in recent years, telecom operators generally feel that they lack experience in building fiber access networks. The gradual implementation of all-optical fiber access networks has become the consensus of various operators. Planning the construction of optical cables on the distribution layer is related to the network construction and operation costs and future benefits of the optical fiber access network, the construction problem that must be paid attention to is how to effectively deploy optical fiber cables.

Position of optical fiber cables in optical fiber access networks

The optical fiber cabling mainly completes the connection between the optical fiber after the optical fiber entry and the optical fiber connection and distribution from the single-core optical fiber to various optical fiber devices after the final connection, as well as the optical fiber distribution (line scheduling ). The optical fiber distribution product can be used to fix, split-fiber buffering, surround reservation, clamping and positioning, grounding protection, fixed joint protection, and distribution, combination, and scheduling of optical fiber cables. At present, the optical fiber access network transmission system basically does not directly provide a large number of 100MEthernet interfaces. Therefore, the optical fiber direct connection mode of the optical fiber splitting is actually used to achieve 100 Mb/s transmission; this transmission method is widely used, which puts forward high requirements on the wiring system.

Common wiring products include: Optical Fiber Distribution Frame, optical fiber transfer box, and optical fiber distribution box. The optical fiber distribution frame is used for connecting External Optical fiber cables to optical communication devices, it also provides modern communication equipment for fixing, binning, splicing, grounding protection, and fiber distribution, combination, and scheduling of external optical cables. The optical fiber junction box is an interface device used for connecting the trunk optical fiber cables to the nodes of the distribution optical fiber cables in the optical fiber access network. It can achieve Optical Fiber fusion, distribution, scheduling, and other functions. It can be implemented or installed over the air. The optical cable splitter is a cabling and cabling device used for Optical Fiber Loop terminals. It can provide Optical Fiber fusion, terminal, wiring and cabling functions. Currently, there is a kind of optical fiber-level cross-connection (FXC). It can be understood as an Optical Distribution Frame (ODF) with cross capabilities, or an Intelligent Optical distribution frame, which is the initial stage of OXC, there is a certain market demand, but the disadvantage is that the device's independent Networking capability is poor.

Optical fiber access network digital integrated Distribution Frame

Fiber optic is a gradual process. The ratio of cable wiring and fiber optic wiring is constantly changing, and fiber optic wiring gradually replaces the cable wiring. The optical fiber digital distribution frame integrates the digital distribution frame and the optical fiber distribution frame. It has the optical fiber distribution and digital distribution functions, and their respective capacities can be determined by users. Therefore, it is very suitable for the flexibility requirements of the optical fiber process.

Intelligent Optical Fiber Distribution Frame (IODF)

The smart optical fiber distribution frame is a high-tech system that integrates computer communication, automatic control, optical transmission and testing technologies, and perfectly integrates with the traditional ODF frame. Various intelligent modules are used to collect the optical power changes of the monitored optical fiber in real time and report the changes to all levels of network management centers. When an alarm is detected, the system quickly sends an alarm to eliminate optical cable line faults in a timely and accurate manner, which effectively compresses the obstacle duration. At the same time, it can also predict the hidden troubles of the transmission system's physical line faults, the performance of optical cables is analyzed statistically to provide decision-making basis for management personnel. The details are as follows:

1. It has the function of optical power meter, which can monitor the received optical power value of the transmission system, reflect the change of optical power, and locate the faulty optical cable segment.

2. The optical power status of the transmission system is intuitively reflected, and sound and light alarms are issued in a timely manner to detect potential faults of the optical fiber physical line as early as possible. The Passive maintenance becomes active maintenance.

3. provides the management function of transmission resources, and provides comprehensive management of equipment in the IDC room, including terminals on the IODF rack and corresponding routes.

In addition to all functions of conventional optical distribution frames, the optical distribution frames developed and manufactured by the Wuhan Institute of posts and communications technology are capable of monitoring and displaying the power of optical contacts, this new type of ODF also provides a standard interface with the local optical communication equipment network management system, you can set the optical routing address table on the network management system. The centralized monitoring system and power frequency current monitoring system developed by Nanjing Putian enables the distribution frame to monitor any faults and even call the bpserver when a fault occurs.

In order to manage the distribution frame more intelligently and cooperate with the application of the intelligent distribution frame, some manufacturers have also developed more system management software, allowing users to set each link, determine whether an SNMP alarm or call is triggered when the link changes, and ensure that critical link alarms are received. These System Management Software even provides the overall functions of recording assembly points, managing distribution frames to distribution frames, optical fiber distribution frames and optical fiber cables, and network switching equipment.