SDH/非SDH接口界面的定时

The Interface Timing between SDH Network and not SDH Network

同步数字系列 Ｓ Ｄ Ｈ 的迅猛发展及传统准同步数字系列 Ｐ Ｄ Ｈ 的大量共存，导致了许多业务须在 Ｓ Ｄ Ｈ 及非 Ｓ Ｄ Ｈ 接口界面上传送。非 Ｓ Ｄ Ｈ 接口定时一般从传统的 Ｐ Ｄ Ｈ ２０４８ｋｂｉｔ／ｓ 数据信号中提取，但 Ｓ Ｄ Ｈ 网络中由于指针调整机制的引入，使得２０４８ｋｂｉｔ／ｓ 数据不再能传递定时信息，这就给 Ｓ Ｄ Ｈ／ 非 Ｓ Ｄ Ｈ 接口界面的定时带来问题。本文提出了再定时及改进解同步器等２ 种解决这一问题的方法。

The rapidly developing of SDH network with the amount of existing PDH network leads to transport signals between this two kinds of network. Traditionally, not SDH interface timing is extracted from the PDH 2048kbit/s signal. While in SDH network 2048kbit/s signal can not carry timing information because of pointer adjustments.This paper present re timing and advamced desynchronizer to slove this problem.