A multi-service integrated access device

Abstract

The invention discloses multi-service integration access equipment. A MCU insert disk connected with a backplane bus is arranged in a unified cabinet. Two upper connected STM-1 optical interfaces, an optical interface and an overhead processing circuit, a VC4 bus, a 4*4 crossover matrix, a flat slot interface, a clock management module, a network management module, a network management interface and a switching module are arranged on the cabinet. A TUSDH insert disk, a TUPDH4 insert disk, a TUPDH2 insert disk, a TU16 insert disk, a TUATM insert disk and a TUMSTP insert disk are inserted in the cabinet and connected with the backplane bus. With the adoption of the optical fiber centralized upper connected backbone integrated networks, the invention realizes the full optical fiber connection of the transmission network, and provides a rich service interface and a unified communication interface capable of access PDH or SDH optical terminal. The far-end equipment is capable of point access, line access or ring access and the network management ability is stronger. Compared with PDH LET, the invention saves the engineering materials, reduces the cabinet space, decreases the failure point and eliminates the engineering and maintenance workload.

Description

technical field [0001] The invention relates to a network communication device, in particular to a multi-service integrated access device. Background technique [0002] The transmission network is produced with the circuit switch and is used to connect the circuit switch, which is an accessory of the circuit switch. With the development of social economy and technology, the transmission network has now become a service network, and various operators have already carried out a large number of various access services directly on the local transmission network, especially the access service of large customers. In fact, the original circuit switch, and even the future 3G can be the key customer service of the transmission network. [0003] The local transmission network is generally divided into a three-layer network structure (see Figure 1): backbone layer, aggregation layer and access layer. The backbone layer and aggregation layer network are composed of SDH network elements...

AI Technical Summary

Problems solved by technology

[0005] 1. The connection between the PDH central office and SDH network elements requires a large number of 75Ω coaxial cables or 120Ω high-frequency symmetrical cables and DDF racks, which occupy a large space in the equipment room, have many fault points, and require a large amount of engineering and maintenance workload

[0006] 2. It is impossible for almost every access point to occupy the bandwidth of the optical transceiver at the initial stage, but the user may increase the bandwidth at any time. If enough cables are laid at one time during the project, the materials will be left idle. If the cables are laid out according to user needs , when user needs change, cables and jumpers need to be re-layouted. The project is very cumbersome, and it also increases the difficulty of DDF terminal board management. Business adjustment requires DDF jumpers, which is very inconvenient

[0007] 3. New users need to install equipment at the central office and user end, lay out optical fibers and a large number of cables, and the construction period is long

[0008] 4. It cannot really provide full-line end-to-end protection for 3A-level customers. The SDH backbone aggregation network is an all-fiber network, which can provide multiple protection functions; Optical port protection function; however, the connection between the PDH local end machine and the SDH network element is a 2M line, and there are many faults and cannot provide protection

[0009] 5. Unable to adapt to the new network requirements. Due to the limited transmission distance of the coaxial cable, the PDH central office can only be placed in the same place as the SDH network element. At present, there are many large business office areas where a large number of customers are concentrated, and these places are far away from If the existing SDH network element is located in the computer room, if PDH access is adopted, it will inevitably occupy a large amount of valuable backbone optical cable resources in the city, and may not meet the optical fiber access needs of all customers

[0010] 6. The network management function is insufficient, and only simple loop test and alarm collection can be performed, and business adjustment, fault location and performance test cannot be performed

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