What’s the difference of FTTH and FTTB？
Fiber broadband is to convert the data from electrical signals to optical signals with optical modems at both ends. Fiber is the most ideal transmission medium among various transmission media in broadband networks. Its characteristics are large transmission capacity, good transmission quality, low loss, long relay distance, etc. And the fiber access can ensure high bandwidth about 10Mbps, 100Mbps, […]
Causes and Countermeasures of ONU Weak Light
At present, the phenomenon of ONU ONT low light is very common. Nationally, ONU low light accounts for 30%, that is, out of 100 users, the ONUs of 30 users have low light. We summarized the low light situation in a certain province, as shown in the figure below. Although after 2 years of debugging […]
Survey of WiFi Network Speed in 39 Home Broadband Users
Currently, the contracted bandwidth of most home broadband users exceeds 100M. Although the contracted bandwidth of users is not low, their experience of internet speed is average. Due to the fact that most of the business of home broadband users is accessed through WiFi, the speed of indoor WiFi has become an important factor affecting […]
Why divide FTTH optical network into multiple segments?
The fiber-to-the-home (FTTH) optical cable line from the central room to the user is generally short-circuited in the trunk section, distribution section, introduction section and household section, as shown in Figure 1. Generally speaking, the less the optical cable link segments, the better the security. Why do FTTH optical cable link have to divide into […]
Engineering budget for attenuation testing in FTTH access projects
In the article “FTTH Access Project Attenuation Test”, mentioned that the loss test in FTTH access project includes: single reel inspection of optical cable, loss test of optical cable line, local test of optical splitter, and full test of ODN optical fiber link. So how should these tasks be applied in the project budget? Single drum inspection of optical cable Although […]
How much will save if use uncut cable in fiber access network?
Fiber Optic Uncut cables are suitable for use in scenarios with multiple branch connections due to their ease of stripping and core splicing. They can be used in the backbone, distribution, introduction, and household (entry) sections of broadband access cable lines. But how much money can be saved by using easy to cut fiber optic […]
How the new optical splitter doubles the access capability of the Combo port?
Combo port resource usage status With the development of fixed gigabit services, XG-PON is gradually taking a dominant position in broadband access networks. In order to share ODN with GPON, XG-PON usually uses Combo optical modules (commonly known as “Combo ports”). Whether users use GPON ONU or XG-PON ONU, they can directly connect to the optical splitter […]
How to calculate and measure fiber optic splitter loss？
In the optical network topology, the emergence of fiber optic splitter helps users maximize network performance. An optical splitter fiber is a passive optical device that can decompose optical signals into multiple optical signal outputs, including one or two input ports and multiple output ports. When the optical network system needs to couple and distribute optical […]
Fiber Patch Cord Types and Functions
According to different fiber types and transmission modes, fiber patch cables can be divided into two categories: Single Mode Fiber Optic Patch Cables and Multimode Fiber Optic Patch Cables. Single mode fiber patch cables are mainly use OS1 and OS2 fibers, generally are G.652D fiber, G.657A1 fiber, G.657A2 fiber, G.657B3 fiber, please refer to article “7 types of optical […]
How to use PLC splitter in PON FTTH Network?
Optical splitter is the core optical device in passive optical network (PON) system, widely used in fiber-to-the-home (FTTH), which has two different distribution methods in FTTH network: centralized distribution and cascaded distribution. Centralized distribution Centralized distribution means that the optical splitters between optical line terminal (OLT) and optical network unit (ONU) are in parallel, basically […]
What causes attenuation of the FTTH drop cable?
The main reasons for ONU weak light are two aspects: equipment reasons and excessive attenuation of ODN link. Because equipment issues are easy to detect and eliminate them from the network management system in time, so now ONU weak light is mainly caused by excessive attenuation. The ODN link is divided into 4 sections, including backbone, distribution, introduction, and household. Which section is most likely to cause excessive […]
The impact of insufficient fiber bending radius on ODN link attenuation
ODN link downlink attenuation is generally abnormal The GPON network uses 1490nm/1310nm wavelengths for both downstream and upstream, while the ODN (Optical Distribution Network) mainly uses G.652D and G.657A2 fibers, which have attenuation of 0.23dB/km and 0.36dB/km at 1490nm/1310nm wavelengths, respectively, as shown in Figure 1. Therefore, under normal circumstances, the downlink attenuation of the […]
