At present, the three major telecom operators IPTV continue to encroach on the traditional radio and television operators cable TV market, radio and television operators face a large number of user loss, radio and television development transformation is imminent, it can be said that who controls the living room who has seized the user. The main business of radio and television operators includes both radio and television business and data two-way service (Internet access / VOD / IPTV / e-government / interactive games) and broadband services, so the FTTH construction of radio and television must involve the FTTH construction of radio and television business and the FTTH construction of data two-way service. Combined with the existing resources of radio and television, FTTH mainly adopts the current mainstream solution in the industry: single fiber three-wave and broadband service access solution. Today, the editor mainly explains it to you.
In the single fiber three-wave and broadband service access solution, ONU data parts uses 1310nm/1490nm optical signal and ONU CATV part uses 1550nm optical signal in the front-end computer room of radio and television through WDM wavelength division multiplexing equipment coupled to a fiber optic cable, and then through the transmission and spectroscopy of ODN equipment at all levels and finally reaches the user’s home, in the user home ONU unit, using the single fiber three-wave ONU CATV developed by our company, that is, data and CATV optical machine 2-in-1 GPON ONU, can directly output broadcast TV signals and broadband data signals. At the same time, based on this solution, radio and television operators can also develop broadband users, realize multi-service income generation, and reduce network construction costs.
The advantages of the single-fiber three-wave access solution are as follows:
1. End-to-end management: Since the network architecture of one fiber and three waves is end-to-end, it is very convenient to manage the ONU. Network administrators can implement remote service delivery, fault maintenance, and enable/disable CATV services through front-end OLT equipment.
2. Low ODN cost: Since the broadcast TV signal and broadband data signal are transmitted on the same physical fiber, this solution greatly reduces the construction cost of ODN resources from the front end to the user’s home.
System topology diagram