![]() ![]() ![]() In terms of transmission rate, PDH has a maximum of 154Mbps and 64 2M SDH can reach more than 10Gbps. To be simple is that 2M, 34M, and 45M services are all PDH, and STM levels are all SDH. Most of the data that does not need to be delivered when connected to the power supply and the optical fiber is PDH, and most of the data that is required by the network management is SDH. It is composed of branch circuit boards, main control boards, etc. The SDH outgoing line is basically determined by the branch circuit model, generally 8E1, 16E1, 32E1, etc. ![]() PDH optical transceivers can also use AC power. The common PDH is 4E1 and 8E1 optical transceivers, which basically do not include branch circuit boards and main control boards. 点击展开菜单 Let Sharetop Tell You about- PDH、SDH、Ethernet、MSTP、WDM、OTN、PTN、IP RANĪ long time ago, the early products of the development of optical communications: PDH and SDH, PDH existed before SDH. ![]()
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