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What is ODN

Date: 2021-10-09 07:57:54 From: C-light Onclick:

ODN is an FTTH optical cable network based on PON equipment, mainly to provide optical transmission channels between OLT and ONU. From the functional point of view, ODN can be divided into feeder optical cable subsystem, distribution optical cable subsystem, household line optical cable subsystem, and optical fiber terminal subsystem from the central office to the user end.

The ODN network construction cost is relatively high, up to 50% to 70% of the overall investment, which is the focus of FTTx investment. At the same time, it is also a difficult point in FTTx management. ODN mostly adopts P2MP topology, there are many connection nodes in the network, and network management is complicated. Optical fiber is more sensitive than copper wire and more easily damaged. Therefore, efficient construction, operation, and maintenance of ODN are essential. A smart and accurate management solution is needed to ensure that the ODN network is fully utilized and effectively protect long-term investment.

Just as we see barcodes on food and other commodities in supermarkets, electronic labels can be added to the optical fiber head to effectively manage the optical fiber. We call it EODN. At present, the technology in this area has become major operators and ITU-T, etc. The focus of discussion and attention of standards organizations.

C-light ODN PLC, EDFA and cable connector

TypeRate and ApplicationForm and compatibilityWork environment
PLCXPON                1x4/8/16/32;2x8/16; Bare/SC/LC; APCI/UPC 8 port;COM
EDFA                8/16/32CH;1U/2U;LCD; Network management; Gain 20dB
                    Cable connector                 



In chapter 10.6.2 on the fourth edition of the "Computer Network" textbook of the Electronic Industry Press, ODN is understood as Optical Distribution Node, that is, optical distribution node. Refers to the fiber node of the analog fiber in HFC (Hybrid Fiber Coax), which is used to connect the analog fiber.

In the development of FTTx , the access layer needs to build a huge optical fiber distribution network, namely the ODN network. ODN network construction cost is high, which can account for up to 50%-70% of the total investment, which is the focus of FTTx investment. At the same time, ODN is also a difficult point in FTTx management. First of all, compared with the simple P2P structure of copper wire, ODN mostly adopts P2MP topology, there are many connection nodes in the network, and network management is complicated. Secondly, optical fiber is more sensitive than copper wire and more easily damaged. Therefore, efficient construction, operation, and maintenance of ODN are essential. A smart and accurate management solution is needed to ensure that the ODN network is fully utilized and effectively protect long-term investment. At present, how to scientifically manage ODN networks has become the focus of attention of major operators and standards organizations such as ITU-T.


Basic structure


ODN includes 5 parts: feeder section, optical cable distribution point, distribution section, optical cable access point and entrance section. The feeder section from the ODF (optical distribution frame) of the central office room to the optical cable distribution point is used as the backbone optical cable to achieve long-distance coverage; Carrying out the nearest distribution of optical fiber; the entry section from the user's access point to the terminal realizes the entry of optical fiber into the home.



The OLT optical line terminal is generally installed and used in the operator's computer room; the ONU optical cable line unit is used at the user end and is generally installed in the corridor unit. ODN optical distribution network, including backbone optical cables, optical splitters, optical cross boxes, user optical cables, etc.

Since the typical distance of ODN in FTTH is 5~10 km, and the length of optical cable reel is generally 1~4 km, in order to extend the optical cable to the user’s home, there are ODF, SSC, FDT, FAT, ATB, TB and other ODN node equipment.


C-Light ODN PON series products

* Supply capability of GPON OLT/ONU SFP/SFF optical module product line with very large cost advantage.
* Capable of customizing GPON optical module design (working wavelength, enabling mode and LCISC interface mode can be customized).
* Self-research to promote domestic products to replace foreign brands, to ensure a stable supply.
* The product has a very stable brand versatility. Verified HW, ZTE, FH, NOKIA, BELL, CALIX, ZHONE.


C-Light's electronic products manufacturing


* Capability of customized processing and supply of optical devices, modules and optical passive products. The main test equipment includes 400G PAM4 error code instrument, 100G40G/25G error code instrument, Agilent 86100* series Eye Diagram equipment, Amway spectrometer, multi-channel light wave power tester, a full set of self-made high-speed test board, high and low temperature patrol test box,aging platform with power on, terminal Surface detector, etc.

* The monthly supply of optical module products below 25G is 150,000 pcs; The monthly supply of 40~100G optical module products is 5,000 pcs; The monthly supply of AOC, and DAC cable is 5,000 pcs; The monthly supply of 4o00G optical module is between 100pcsand 500pcs; The monthly supply of passive products of wave classification is 2000 to 4000 pcs.

* We have an excellent product supply test environment in optical communication segment fields such as wave division, digital communication, PON, data center and other application fields.

* Taking industrial-grade CWDM/DWDM products as an example: C-Light has a speed of 100G, 40G, 25G, 10G, 2.5G, 1.25G, 155M and a complete industrial-grade (-40~85') wavelength shift. Controllable manufacturing capability of DWDM and CWDM products, especially in the field of small wavelength interval wave division products. Many products are self-made by C-Light within the industry.


C-Light after sales and technical support


* 25 full-time sales staff; 5 full-time technical support personnel; Support Chinese/English/Russian technical exchange
* There are full-time network engineers to provide guidance for customers to build the network
* For professional customers, we provide some free samples, free pre-sale and after-sale video conference technical exchange guidance
* We offer 3-year warranty on all products and a 5-year warranty on some products
* All regular and standard products have a standing stock
* Purchase various reliability test equipment can complete 99% of the reliability test and provide reports for customers
* We have purchased more than 100 varieties of 1G~400G switches for our customers to conduct compatibility and versatility tests


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