Passive Optical LAN(POL) and application prospect

Preface:At present,most enterprise networks use traditional copper wire LAN, which are showing more and more drawbacks. With the rapid development of cloud computing, big data, and 4K video, more and more businesses are gradually migrating to cloud data centers. Followed by changes in traffic and architecture, the majority of traffic has shifted from a local switching architecture to a cloud switching architecture. On the other hand, with the explosive development of video, IoT, and the Internet, these applications have increasingly higher requirements for high bandwidth and low latency. In the age of digital transformation, enterprises urgently need a network that can carry all “things” access, and the POL network is the best choice.

1、POL Introduction

1.1 POL overview

POL is an enterprise LAN based on PON technology that provides users with integrated data, voice, video and other services through optical fibers. It is not a new technology, but applies the PON network technology that has been proven for a long time in the ISP network to the enterprise network. POL can bring great value to customers, at the same time, it will not change the existing business planning and customers network connection mode, and can provide all the functions provided by the traditional LAN network.

1.2 POL topology

POL provides a Layer 2 transmission network, adopts PON technology to provide gigabit access to user, and uses a single optical fiber to converge sevaral services such as video, data, wireless, and voice.

POL toplogy:


1.3 Comparison between POL and traditional LAN

In the POL network, the aggregation switch in the traditional LAN will be replaced by the OLT, the copper cable will be replaced by the optical fiber, and the access switch will be replaced by the passive optical splitter. The ONU provides Layer 2/Layer 3 functions and provide data, voice and video services by wired or wireless.
The downstream of PON network adopts the broadcast mode: the optical signal is sent by the OLT and divided into multiple optical signals to each ONU with the same information through the optical splitter. The ONU selectively receives its own packages according to the tags carried in the message and discard the packages that tags are not match.

The upstream of PON network: the OLT uniformly allocates a time slice to each ONU. The ONU strictly transmits signals according to this time slice window.ONU will shutdown the optical port when the time slice does not belong to its own time slice. The upstream time window scheduling mechanism is highly dependent on the PON distance measurement technology.
An understanding of PON technology principles will help us to apply this technology more proficiently in network design,In particular, the passive (no power supply required) characteristics of its optical distribution network, and the point distribution planning and design caused by the difference from traditional switches require special attention.To ensure the traffic packets in both directions are forwarded on a single-core fiber, PON uses wavelength division to process two-way signal transmission at the same time. Upstream and downstream signals use different wavelengths, but are transmitted on the same fiber. The direction from OLT to ONU/ONT is the downstream direction, and vice versa is the upstream direction. The downstream direction uses 1490nm and the upstream direction uses 1310nm.
Line structure comparison:


Device selection comparison:

  Subsystem Name Traditional solution equipments POL solution equipments
1 Device room/machine house system ODF、Voice distribution frame ODF,Splitter (centrally placed)
2 Backbone wiring/vertical wiring subsystem Most copper cables or indoor multimode optical cables Indoor single-mode optical fiber
3 Floor management/floor machine house system Rack/cabinet, copper cable distribution frame, optical fiber distribution frame Floor distribution box, optical fiber connector, optical splitter (dispersing device)
4 Horizontal wiring subsystem Twisted pair, indoor multi-mode optical cable Butterfly fiber
5 Work area subsystem Copper module, copper panel, copper cable Fiber and fiber connectors

2、POL advantage analysis

Through the comparison between POL and traditional LAN in the previous section, we can find the challenges of traditional LAN and the unique advantages of POL.

Challenges of traditional LAN:

A large number of switches occupy the space of the computer room, high power consumption, and difficult heat dissipation.

The connection between aggregation routers is complicated,and it takes up pipeline space, making wiring and maintenance difficult.

Switch locations are scattered,management is complicated, and a large maintenance team is required.
Transmission distance limitation.
It is complicated to add new network equipment.

It is difficult to upgrade and expand network.

Whether its transmission distance,smooth network upgrades,high reliability,flexible networking,easy deployment,and simplified operation and maintenance,the traditional integrated wiring system has completely lagged behind POL. The POL integrates the transmission of traditional integrated wiring with fiber to the desktop, fiber to user unit, and fiber to the public area and turns the original L3 network into a flat L2 architecture.Enterprises can integrate different systems such as data,voice,video security,and wireless into a single optical fiber network, which has incomparable advantages over traditional integrated wiring.

POL advantage analysis:

Advanced architecture:POL network uses single-mode fiber,with almost unlimited bandwidth potential, and smooth broadband upgrades on demand.

Safe and reliable:Full optical fiber transmission,anti-detection,anti-electromagnetic interference, PON device provides strong DoS defense capabilities, reducing network attacks.

Converged bearer: The POL solution can bear data, voice, video and other services on one network.

Space saving: The POL solution is super convergent. The park only needs to provide a core computer room and don’t need many floor computer rooms.

Wide coverage: Covered distance is 20km,meeting the coverage requirements of super-high buildings and super-large parks.

Green and energy-saving: The POL solution uses passive optical splitters to replace convergence equipment of the traditional network,and the equipment room does not require air conditioning,which is more energy-efficient.

Convenient maintenance: PON technology adopts a centralized management method to avoid the disadvantages of decentralized management of traditional schemes and reduce the difficulty of operation and maintenance.

Cost advantage: Based on past experience, using 1000 points as a sample, choosing POL’s FTTD (Fiber To The Desktop) method will save 15% cost compared to traditional switch networks, and choosing FTTO (Fiber To The Office) will save cost more than 58% compared to switch networks.

3、Prospects of POL Development

POL is in the early development stages currently, and the current utilization rate is not high, but significant changes will occur in the next five years. The degree of POL solutions selection by enterprise users is not high enough,but manufacturers and social groups have been vigorously promoting this technology,and the IoT demand will become an important driving force to promote POL.

When it comes to POL applicable scenarios,most people may think of places such as corporate offices,education parks,and hotels.It cannot be denied that these places are the most widely used places,but from the unique advantages of POL,we can see that POL helps reduce energy consumption and operating costs.The IoT is the key to truly promoting the adoption of POL technology by enterprises. In the IoT application solution,a large number of terminal devices scattered in various places need to be connected to the network,Traditional LAN cannot meet such demand, and POL can serve as a bridge to eliminate the gap in this demand.Therefore,POL will find greater applications in the urban infrastructure, manufacturing,processing,solar,wind,and smart energy fields.The reason is that the current cable lines in these industrial facilities usually extend several miles,while POL can extend a long distance,and nodes can be deployed along the line through multi-fiber co-cables and optical splitters.Take the manufacturing industry as an example,it involves sensors such as flow meters, filters,or temperature,these devices need to be connected to the Internet,and traditional LAN are difficult to meet their networking needs.What is needed is to be able to operate stably in the working environment of these sensor devices.And does not produce electromagnetic interference or radiation.POL is just such a technology.It has a long transmission distance,can be networked through an optical splitter,does not produce electromagnetic interference and radiation,and can be used for the connection of most equipment.It has great needs in manufacturing and processing industries.Play a role in the large area and wide coverag application scenarios.

POL is an amazing technology because it is based on optical fiber transmission,has a simple network structure,is easy to manage,and has certain advantages in both construction and operation and maintenance costs.With the continuous development of enterprises,users put forward higher requirements for bandwidth, and the use of optical fibers will become more and more common,expanding from campus networks,backbone networks to the access field.IT users try to accept it,and good technology will prove its value through time.But I have to admit that there is still huge resistance to POL’s promotion.Enterprises that have invested heavily in traditional LAN may not change to POL,at least not immediately.For small organizations,POL solutions may be not a good idea.Compared with twisted-pair copper-based networks,user may not use all the capacity that POL can provide,and the solution may become very expensive. Therefore,these two technologies may coexist in the future,and POL will be used to make up for the functions that traditional LAN cannot achieve.Moreover,for those who familiar with traditional network technology, it takes time to gradually learn, adapt, master and apply POL technology.


With the intelligentization of cities,the application of cloud computing and big data,and the popularization of IoT,more and more enterprise applications will become cloud-based in the future.For enterprise networks,the digital transformation is imperative,which requires a simple network.POL have the characteristics of one network with multiple services,cost-effectiveness, simplicity, flexibility,safety and reliability,effectively supports enterprise digitization.So it is becoming the best choice for digital transformation in education,hotel,electric power, transportation,smart security,industry and other fields.With the gradual improvement of customer recognition,the ecology is also growing. I believe that the POL will continue to grow rapidly in the future.


IPv6 Technology for C-Data ONU Products

IPv6 Technology for C-Data ONU Products

The rapid development of the Internet had brought a large number of intelligent terminals to our home and increasingly exhausted the IPv4 address resources we are using. Although NAT technology helps to delay the speed of the IPv4 address consumption, the world Internet technology is still developing towards IPv6 technology which has become one of the key basic technologies required by 5G, cloud computing and Internet of things technologies.

In the past two years, the world has advocated and accelerated the deployment of IPv6 technology to meet the urgent needs of the connection of massive intelligent terminals, the innovation of technology industries, and the enhancement of network security capability. Almost all ISP/Operators are building the next generation of the Internet based on IPv6 technology.

C-Data, as a professional manufacturer in access network technology, will discuss the following related topics to help you understand IPv6 technology more comprehensively.

  • Overview of IPv6 Technology
  • Transition Technology from IPv4 to IPv6
  • Relevanceof C-Data ONU to IPv6 Technology
  • C-Data ONU products supporting IPv6 technology
  • Expectation of IPv6 Technology in The Future

1、Overview of IPv6 Technology

1.1 What is IPv6?

IPv6 (Internet Protocol Version 6) is the next generation of the current Internet Protocol (IPv4). Composed of 128-bit binary numbers, IPv6 provides a huge resource of IP address enough for every living creature and even every grain of sand on the earth to be assigned one or more IP addresses. IPv6 is to divide the 128-bit address into segments per 16 bits, and each segment is separated by colons when converted into hexadecimal digits.

An example of IPv4 address:

An example of IPv6 address: 2002:0db8:85a3:08d3:1319:8a2e: 0370:7344

1.2 Why use IPv6 technology?

IPv4 technology is a 32-bit binary address, which can address 16 million networks and 4 billion hosts. However, with the adoption of A, B, and C addressing methods, the number of available network addresses and host machines is greatly reduced. Moreover, as the core technology and about 3 / 4 IP resources are mastered by European and American countries due to their developed Internet, many developing countries fall into the predicament of insufficient IP address resources. In fact, with the increasing number of global Internet users and the vigorous development of intelligent terminals and network technology, the lack of IP address resources will seriously restrict the application and development of the Internet in many countries around the world.

1.3 Current situation of IPv6 Technology

If to realize the complete transition from IPv4 to IPv6, it requires the network software, hardware, and terminal equipment in the global Internet infrastructure to support IPv6 protocol, which will involve a lot of transformation work. Although IPv6 technology has been proposed as early as the 2010 year, it has only been promoted by governments and major ISP/Operators in recent two years. Moreover, the long-term coexistence of IPv4 and IPv6 is still a compatibility issue that we need to consider.

1.4 What are the advantages of IPv6 over IPv4?

Compared with IPv4, IPv6 has the following advantages:

  • Larger address space. The IP address length of IPv4 is 32; that is, there are 2^32-1 addresses. While the IP address length of IPv6 is 128, that is, there are 2^128-1 addresses.
  • Smaller routing table. Compared with IPv4, IPv6 packet header contains half of the fields, and all fields are aligned with 64-bit boundaries, which greatly improves the processing speed.
  • Enhanced multicast support and streaming support. There is no terrible broadcast storm caused by the IPv4 as the multicast support, and streaming support provide a good opportunity for the development of multimedia services.
  • Higher security. Users can encrypt the data in the network layer and verify the IP message while using IPv6, which greatly enhances network security.

In view of the advantages of IPv6, IPv6 will eventually completely replace IPv4 and occupy a dominant position on the Internet after a long period of coexistence of IPv4 and IPv6.

2、Transition technology from IPv4 to IPv6

Since IPv6 will eventually replace IPv4, how to achieve a network environment fully IPv6 compatible? The initial network transformation from IPv4 to IPv6 reveals that there is a thorough adjustment from protocol to hardware, including the client and server. Therefore, the issue of backward compatibility has been taken into account by IETF when designing IPv6 from the very beginning. The ISP/Operator will provide an intermediate node and uses DNS64 / NAT64 technologies, which are responsible for protocol conversion to connect the link between IPv6 and IPv4.

2.1. Tunnel technology for the initial transition

At the tunnel entrance between the IPv6 and the IPv4, the router encapsulates the entire IPv6 datagram into the data field of the IPv4 datagram. The source address and destination address of the IPv4 packet are respectively the tunnel entrance and exit of IPv4 addresses. At the exit of the tunnel, the IPv6 packet is taken out and forwarded to the destination node.


2.2. Dual-stack technology for IPv4 / IPv6 coexistence

Dual-stack technology is an effective technology for the transition from IPv4 to IPv6. The nodes in the network support both IPv4 and IPv6 protocol stacks. The source node selects different protocol stacks according to the different destination nodes while networking equipment according to the protocol type of the message. A dual-stack can be implemented on a single device or a dual-stack backbone. For a dual-stack backbone network, all devices must support IPv4 / IPv6 protocol stack at the same time, and the interface connecting the dual-stack network must be configured with both IPv4 and IPv6 addresses.

2.13、Relevance of C-Data ONU to IPv6 Technology

The IPv6 network is divided into a backbone network and an access network. As the backbone network carries a lot of IPv6 services, most ISP/Operators have completed the deployment of the IPv6 backbone network but the access network is used for the access of terminal users. Nowadays, given that almost every family is connected with optical fiber, how to integrate IPv6 function on PON products to solve the problem of IPv6 compatibility is a difficult problem faced by many a ONU manufacturer.

In order to realize fast and easy access to IPv6 network in FTTH and adapt to the needs of global IPv6 network development, C-Data has spared no effort to make ONU support IPv6 service, and a graphical interface is released for end-users to use IPv6 on C-Data ONU easily. Furthermore, C-Data ONU supports IPv4 / IPv6 dual-stack transition technology and has revived the Anatel certification to meet the IPv6 networks in most of the countries. Some countries’ networks have used C-Data ONU as IPv6 network access.

There are two IPv6 network scenarios of C-Data ONU discussing as follows:

Scenario 1: transparent transmission of IPv4 / IPv6 services by ONU bridge mode

This scenario is mainly used for PPPoE or IPoE of IPv4 / IPv6, with user computers attached to ONU devices or wireless routers attached to ONU devices. Both OLT and ONU during transmission act as middle transmission devices, and only bridge mode is configured to transparently transmit IPv4 / IPv6 services. It is worth noting that whether the intermediate OLT and ONU devices support transparent IPv6 services needs to be considered because there are many OLT and ONU devices on the market that do not support transparent transmission of IPv6 services.


Scenario 2: ONU routing mode carries IPv4 / IPv6 services

In this scenario, the routing mode on ONU should support PPPoE or IPoE services of IPv4 / IPv6, and then allocates IPv4 / IPv6 address to the attached user computer or wireless router through DHCPV4 / DHCPv6 to realize the network access of IPv4 / IPv6. It is available for the OLT devices and the transparent transmission of IPv4 / IPv6. In this scenario, many manufacturers’ ONU products are difficult to implement. However, a lot of ONU manufacturers fail to apply their products to this scenario as there is a couple of issues to figure out, such as the compatibility of IPv6, the implementation of IPv6 Routing, the coexistence of IPv4 and IPv6, and the distribution of IPv6 address.

4.14、C-Data ONU Products Supporting IPv6 Technology

No. ONU Form ONU Models Function Description
1 EPON&GPON&XPON 1GE/1GE+CATV FD511G&FD701G Series 1. Support PPPoE / IPoE, DHCPv6, IPv4 / IPv6 dual stack functions of IPv4 and IPv6 in routing mode;

2. Support transparent transmission of IPv4 / IPv6 service in bridge mode.

2 EPON&GPON&XPON 1GE+wifi/1GE+1FE+wifi/


FD511GW&FD512XW&FD702XW&FD604GW&FD804GW Series 1. Support PPPoE / IPoE, DHCPv6, IPv4 / IPv6 dual stack functions of IPv4 and IPv6 in routing mode;

2. Support transparent transmission of IPv4 / IPv6 service in bridge mode.



FD50X&FD704X&FD504G Series 1. Only transparent transmission of IPv4 / IPv6 service in bridge mode.

5、Expectation of IPv6 Technology in the Future

  • The global network will build new information technology facilities based on IPv6 and give priority to the use of IPv6 in 5G, the Internet of things, and the industrial Internet.
  • Technical standards such as IPv6 + and SRv6 will be derived from IPv6 single stack. The application mode will be innovated to increase the pilot and commercial applications under the coordination with industrial chains.
  • Intelligent ultra-wide, intelligent connection and intelligent operation and maintenance are the main characteristics of the future IP network. IPv6 is the best choice for an intelligent IP network.


AI, big data, cloud computing, and the Internet of things technologies have an important connection with TCP / IP protocol. IP is the network layer protocol standardizing the exchange and routing of Internet packet information. As an infrastructure, IPv6 will construct a new Internet era.

As a professional FTTH broadband access product supplier, C-Data will accelerate the deployment of the IPv6 network together with the global ISP/Operators and apply more IPv6 technologies to the products. If you are interested in IPv6 technology, C-Data welcomes the chance to provide C-Data ONU for you and discuss IPv6 technology together.

ccbn 2017

C-Data showed FTTH、EOC、WLAN solutions at CCBN2017

March 23, 2017, the three-day 2017 China Content Broadcasting Network(referred to as CCBN 2017)opened in Beijing International Exhibition Center. As the Asia-Pacific region’s largest Radio and television technology equipment exhibition, The exhibition of “fusion of horizons, intellectually enjoy the future” as its theme, Aimed at speeding up the convergence of traditional roadcasting media and new media, digital and accelerate the intelligent integration of radio and television networks, providing people with more quality and efficient services. Read more


Welcome to Visit C-Data at CCBN 2017

China Content Broadcasting Network (CCBN2017)
Date: 23 – 25 March, 2017
Venue: China International Exhibition Center (CIEC) Beijing, China
Booth: 206/8A

Read more

C-Data new year party

C-Data 2017 New Year Celebrating Party

Time flies, 2016 is about to conclude and we’re about to welcome the start of 2017.

C-Data 2017 New Year Celebrating Party have hold in the Nan Rong hotel. C-Data staff and many guests gathered to celebrate the 2017 New Year.

Mr. Alan Cui, Company Chairman and General Manager, represent the company to give New Year speech. Reviews the company’s development course, summarize forgain and losses in 2016, proclaiming the company focus in 2017.

cui yunliang

2016 has been agreat achievements year. We have greatly improved in product development, manufacturing, sales and technical service. Our team grow rapidly, office space and factory extend from the 2400square meters to 8400. Most of all, our sale revenue reached a new record high.We will consider our products and technology, market opportunities, attention to quality and efficiency, to achieve sustained rapid growthin 2017.

c-data 2017 new year celebrating party

In the meeting we also recognized 2016 annual outstanding employees, model workers, honoring sales. Award-winning staff are those with outstanding performance in their jobs, have developed big shot, versatile, star Customer Service, high-energy PMC. They won prolonged warm applause and cheers. Our staff have made a selfless contribution on job. We express our respect to all and wish happiness in New Year.

C-Data staff also prepare some programme to celebrate. The gala highlights a variety of songs, comedy skits and talks. We have a fantastic celebration of the good friendship and good spirits that can last not only a year, but a life time.


 Sketch San Juban

indian dance

Indian Dance


Dancing Sandy Thompson

 During this past year, we work together, forge ahead, won recognition of our customer and achieved gratifying results. Looking to the future, we are full of hope, passion. A good opportunity is just round the corner. We will be united as one, draw on collective wisdom and useful ideas, be bold to carry on innovation, forging ahead towards a more brilliant 2017!

Convergence India 2017

Welcome to Visit Us at Convergence India 2017

Launched in 1992, the Convergence India series of expo is credited as South Asia’s largest ICT expo now celebrating its 25th anniversary.

Convergence India is the only platform in this region which demonstrates convergence of technologies in Telecom, IT, Broadcast & Digital media sectors.

The expo will showcase latest trends and technologies related to Telecom, Broadcast, Cable and Satellite TV, Cloud & Big Data, IoT, Digital Homes, Mobile devices, Film and Radio, Content Creation, Management and Delivery, etc. and also provides engagement with digital innovators, international business gurus, telecom and broadcasting czars, leaders from IT & Internet and IoT industries.

C-Data is a high-tech enterprise which is specialized in access network products, C-Data has accumulated many technologies in the field of access network for many years. The products can meet the demands of triple play in functionalities and performances. In this exhibition, we will show you GPON/EPON FTTx and PON + EOC solutions, the application of full range of products and technology.

We sincerely invite you to visit our booth again, On the way of expanding broadcasting market, C-Data is pleased to cooperate with you to develop the radio and television network and push forward the development of Information Technology.

The 25th Convergence India 2017
Venue: Pragati Maidan, New Delhi, India
Date: 08- 10 February, 2017
Booth: Hall9 A14

Booth location:

cdata booth at convergence india 2017

c-data cioe 2016

C-Data Successed the CIOE 2016

China International Optoelectronic Exposition (CIOE) has been held successfully for 18 years. The event is world’s largest and most influential exhibition in optoelectronics industry with a total exhibition area of 110,000 sq. meters. More than 3,200 exhibitors and 60,000 visitors are expected to attend the event.

C-Data is a high-tech enterprise which is specialized in access network products, C-Data has accumulated many technologies in the field of access network for many years。The products can meet the demands of triple play in functionalities and performances. In this exhibition,we will show you GPON/EPON FTTx and PON + EOC solutions,the application of full range of products and technology.

fttx pon eoc access solution

In this exhibition,C-DATA has successfully showed  GPON OLT,  EPON OLT and a various of GPON / GEPON ONU, EOC, HFC productS. Many people like these products.


pose for C-Data group photo

C-Data organized a two-day trip to celebrate The 7th anniversary ceremony

To celebrate The 7th anniversary ceremony, Shenzhen C-Data Technology CO., Ltd, one of the biggest high-tech enterprises that focus on providing broadband network access devices organized all staffs a two -day trip.

on 18th August, all staffs went to Liu Xihe Forest Park and began outward bound training  to improve the staff’s cohesive force and team consciousness.

pose for c-data group photo

Pose for a group photo

 pose for C-Data sales team

(pose for sales team)

C-Data outward bound training(C-Data outward bound trainning)

C-Data diversion projectdiversion project


break the codebreak the code

At 19:00 we all arrived at heng rice Carlton hotel for anniversary ceremony dinner in Conghua. At the dinner party, Mr. Cui, the CEO of C-Data  made an important speeches, not only in retrospected C-Data’s history, but also brought exciting news to all and made all are confident in the future.

The next day morning, We visited the highest waterfall in Mainland China– Baishuizhai scenic spot, climbing the mountain and enjoying the beautiful scenery.

Baishuizhai waterfall

In the afternoon, we also visit  the crane state wetland park to enjoy the idyllic scenery and the cool green rippling lake.

one hundred years old withered Litchi in the lake(one hundred years old withered Litchi in the lake)

After that trip, all staffs of C-Data not only enjoyed the beautiful scenery, but also stimulated all work hard together to create the new glory of C-Data.


pt expo comm china

The 25th PT/EXPO COMM CHINA Invitation

Venue: China International Exhibition Center, Beijing, China
Date: 20- 23 September, 2016
Booth: 4103, Hall 4

The 25th PT/EXPO COMM CHINA  will be launched in the Beijing China International Exhibition Center of China from September 20th to 23th. C-Data is located in 4103 booth, welcome you come to visit the guidance.
C-Data is a high-tech enterprise which is specialized in access network products, C-Data has accumulated many technologies in the field of access network for many years。The products can meet the demands of triple play in functionalities and performances. In this exhibition,we will show you GPON/EPON FTTx and PON + EOC solutions,the application of full range of products and technology.
We sincerely invite you to visit our booth again, On the way of expanding broadcasting market, C-Data is pleased to cooperate with you to develop the radio and television network and push forward the development of Information Technology.


c-data at cioe 2016

The 18th China international Optoelectronic Exposition Invitation

The 18th China international Optoelectronic Exposition
Venue: Shenzhen Convention & Exhibition Center, China
Date: 6- 9 September, 2016
Booth: 6037,6038,6039, Hall 6

The 18th China international Optoelectronic Exposition will be launched in the Shenzhen Convention & Exhibition Center of China from September 6th to 9th.
C-Data is located in 6037,6038,6039 booth, welcome you come to visit the guidance.
C-Data is a high-tech enterprise which is specialized in access network products, C-Data has accumulated many technologies in the field of access network for many years。The products can meet the demands of triple play in functionalities and performances. In this exhibition,we will show you GPON/EPON FTTx and PON + EOC solutions,the application of full range of products and technology.
We sincerely invite you to visit our booth again, On the way of expanding broadcasting market, C-Data is pleased to cooperate with you to develop the radio and television network and push forward the development of Information Technology. Thank you!

layout of cioe 2016