Station network
With the popularization of fiber-optic broadband, thousands of households have used the broadband network, but few people know what the resident network is, and even confuse the network cable with the optical cable, so what is the resident network?
Definition of premise network: It is the last mile access network between operators and users. The customer premises network (CPN) uses wired and wireless methods, from the service concentration point of the customer premises to the transmission and lines between the user terminals and other related facilities. It usually refers to the FTTH community invested and constructed by the operator to provide wired broadband network resources for home customers. The customer premises can It is a residential area, or it can be one or multiple adjacent office buildings, excluding the access network within the metropolitan area
From the project interface, the resident network project can be divided into two parts: local network access and resident network. The local network access part refers to the construction and maintenance of the optical cable from the OLT to the optical transfer box and the construction and maintenance of the OLT equipment, which is the responsibility of the local transmission network. The resident network part refers to the optical cables introduced into the residential area and the lines and equipment in the residential area, including feeder optical cables, distribution optical cables, household lines (incoming optical cables or cables), multimedia boxes, ONU equipment, optical splitters, distribution boxes, door heads boxes and junction boxes, etc.
Equipment introduction OLT, optical cross-connect box: The optical cross-connect box is equivalent to the ODF frame, but it is denser than the ODF, and can be installed outdoors. The box designed and manufactured by accessories such as optical splitters, optical fiber splicing trays and optical fiber active connectors can be installed inside. It has a certain dust-proof function and is generally installed on the ground.
Optical fiber distribution box: suitable for optical fiber cable fusion and distribution at the branch optical cable terminal in the optical fiber access network. The optical distribution box is a box specially used for optical fiber distribution. There are fiber optic boxes, flanges, pigtails and optical cables inside. According to different use environments, it is divided into indoor type and outdoor type. In order to adapt the optical splitter to different installation environments, the external structures are quite different. It can be roughly divided into modular type, rack type, tray type, and insert type. Modular (cassette) optical splitters are divided into 1:2, 1:4, 1:8, 1:16, 1:32, etc. according to size. 1:4 optical splitters are often installed in optical fiber splitters, and 1:16 Optical splitters are often installed in optical boxes.
Optical cable splicing box: Optical cable splicing box, also known as optical cable splicing box, passive equipment, divided according to the number of cores, there are 6 cores, 12 cores, 24 cores, 48 cores, etc.
ONU: The demarcation point for business decentralization, it can provide a variety of business interfaces, including Internet broadband, voice, and video. The internal structure of the ONU is a combination of co-rotation and photoelectric converters. It chooses to receive the broadcast data sent by the OLT, responds to the ranging and power control commands sent by the OLT, and makes corresponding adjustments, buffers the user’s Ethernet data, and sends it in the upstream direction in the sending window allocated by the OLT.
