Optical network terminal (commonly known as optical cat or optical modem), refers to the transmission through the fiber medium, the optical signal modulation and demodulation to other protocol signals of the network equipment. The Lightcat device acts as a relay transmission device for large local area networks, metropolitan area networks and wide area networks. Different from the optical transceiver, the optical transceiver only receives and emits light, and does not involve the conversion of the protocol.
A Modem is an electronic device that modulates a digital signal to an analog signal for transmission, and demodulates the received analog signal to obtain a digital signal. Its goal is to generate an analog signal that can be transmitted easily and to restore the original digital signal by decoding. Depending on the application, the MODEM can use different means to transmit analog signals, such as fiber optics, RF radio, or telephone lines.
Telephone modems that use the audio band of a common telephone line for data communication are the most commonly encountered modems. In spoken English, many people refer to the phone modem as "cat" or "magic" based on the first syllable of the English pronunciation.
Other common modems include cable modems for broadband data access, ADSL modems, and fiber modems. A digital mobile phone is actually a wireless modem. Modern telecommunication transmission equipment is designed to transfer large amounts of information over long distances on different media, so it is also based on the function of the modem. Microwave modems can be used at millions of bits per second. The optical modem using optical fiber as the transmission medium can reach more than tens of Gbps, is now the backbone of telecommunications transmission Passive optical network (Passive optical network), also known as the passive optical fiber network, is a kind of optical fiber communication network, which is characterized by no power supply to complete signal processing, just like a mirror at home, it does not need electricity to reflect the image, in addition to the terminal equipment needs to use electricity, The nodes in the middle are made of delicate and small fiber optic components.
According to the concept of New Generation Network (NGN), telecommunication network can be roughly divided into two parts: core network and access network. The core network is equivalent to traditional relay and long-distance lines. The access network has a ring of fiber optic cables. The functions of core network and access network are different, and their transmission forms are also different. Therefore, PON applications can be divided into two types: PON of core network and PON of access network. The former is mainly based on WDM, and the latter uses both optical diverter and WDM components.
The above knowledge is a brief explanation about the optical network terminal brought by Shenzhen HDV Phoelectron Technology LTD., which is a manufacturer specializing in communication network equipment as its main products. Their related equipment is related to: olt onu/ intelligent onu/ ac onu/ fiber onu/ catv onu/ gpon onu/ xpon onu/ olt equipment/olt switch/gpon olt/ epon olt and so on, welcome users to come to the product consultation.
