Protection switching device for synchronous transfer module (STM)-1 upper optical interface and achieving method

Abstract

The invention discloses a protection switching device for a synchronous transfer module (STM)-1 upper optical interface and an achieving method and relates to the field of STM-1 upper optical interfaces for a gigabit passive optical network (GPON) system. The protection switching device comprises a complex programmable logic device (CPLD), an optical interface chip supporting a two-way STM-1 optical interface, a primary STM-1 demultiplexing chip, a primary circuit simulation CES chip, a primary physical layer (PHY) chip, a standby STM-1 demultiplexing chip, a standby CES chip, a standby PHY chip, a switching control chip, an exchange chip and a backing plate. A primary optical path channel of the optical interface chip is connected with the switching control chip sequentially through the primary STM-1 demultiplexing chip, the primary CES chip and the primary PHY chip; and a standby optical path channel of the optical interface chip is connected with the switching control chip sequentially through the standby STM-1 demultiplexing chip, the standby CES chip and the standby PHY chip. According to the protection switching device, the time needed for performing protection switching on the STM-1 upper optical interface is short, and operators' requirements can be met.

Description

technical field [0001] The present invention relates to the STM-1 (STM-Synchronous Transfer Module, synchronous transfer module) uplink optical port field of GPON (Gigabit Passive Optical Network, Gigabit Passive Optical Network) system, specifically relates to a kind of STM-1 for GPON system 1 Protection switching device and implementation method of uplink optical port. Background technique [0002] The STM-1 interface belongs to the uplink interface of the traditional GPON system. The E1 signal demultiplexed by the STM-1 optical port is packaged into a standard Ethernet packet through a dedicated chip with CES technology. The GPON system transmits the Ethernet packet to the ONU. After the ONU parses the Ethernet message, it obtains the E1 signal output. [0003] At present, when the existing STM-1 optical port is protected and switched, generally two optical modules are connected to the STM-1 optical interface chip of the OLT device of GPON that supports 2 STM-1 optical i...

AI Technical Summary

Problems solved by technology

[0004] With the development of communication technology, operators of GPON systems have higher and higher requirements for the time required for protection switching of STM-1 optical ports, and the detection time required for protection switching is realized through the detection mechanism inside the STM-1 optical interface chip Long, difficult to meet the needs of operators

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