Optical transceiver is the terminal equipment for optical signal transmission. Optical transceivers should be classified into telephone optical transceivers, video optical transceivers, audio optical transceivers, data optical transceivers, Ethernet optical transceivers, and optical transceivers into 3 categories: PDH, SPDH, SDH.

SDH (Synchronous Digital Hierarchy, Synchronous Digital Hierarchy), according to the recommended definition of ITU-T, is the transmission of digital signals at different speeds to provide a corresponding level of information structure, including multiplexing methods, mapping methods, and related synchronization methods. Technical system.

SDH optical transceiver has a large capacity, generally 16E1 to 4032E1. Now widely used in optical networks, SDH optical terminal is a kind of terminal equipment used in optical networks.

The main application of SDH optical transceiver
SDH transmission equipment has been greatly developed in the wide area network field and the private network field. Telecom operators such as China Telecom, China Unicom, and Radio and Television have already built SDH-based backbone optical transmission networks on a large scale.

Operators use large-capacity SDH loops to carry IP services, ATM services, and optical fiber integrated access equipment or directly lease circuits to enterprises and institutions.

Some large-scale private networks also use SDH technology to set up SDH optical loops within the system to carry various services. For example, the power system uses SDH loops to carry internal data, remote control, video, voice and other services.