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¿µ¹® Ç¥Áظí TIMING CHARACTERISTICS OF SDH EQUIPMENT SLAVE CLOCKS(SEC)
ÇÑ±Û ³»¿ë¿ä¾à ÁÖ¿ä ³»¿ëÀ¸·Î´Â SDH ÀåÄ¡¿¡¼­ »ç¿ëµÇ´Â ŸÀÌ¹Ö ÀåÄ¡ÀÇ ÃÖ¼Ò ¿ä±¸»çÇ×ÀÌ´Ù. ÀϹÝÀûÀ¸·Î SDH ÀåġŬ·°(SDH equipment clock: SEC)Àº ±âÁØ Å¬·°À» º¹¼ö·Î °®°í ÀÖÀ¸¸ç, ¸¶½ºÅÍ Å¬·°°ú ½º·¹À̺ê Ŭ·°°£ÀÇ ¸ðµç ¿¬°áÀÌ ²÷¾îÁú ¶§ ÁÖ¾îÁø ¼º´ÉÀ» À¯ÁöÇϴ Ȧµå¿À¹ö ±â´ÉÀÌ ÀÖ¾î¾ß ÇÑ´Ù. ÀÌ Ç¥ÁØÀº SDH ÀåÄ¡ Ŭ·°ÀÇ ÃÖ¼ÒÇÑ ¿ä±¸»çÇ×À» Á¤ÀÇÇϰí ÀÖÀ¸¸ç SEC°¡ ´Ù¸¥ SEC³ª ´õ ÁÁÀº Ŭ·°À¸·ÎºÎÅÍ Å¸À̹ÖÀ» ¹ÞÀ» ¶§ ¿Ã¹Ù¸¥ ¸Áµ¿ÀÛÀ» ÇÒ ¼ö ÀÖµµ·Ï ÇØ ÁØ´Ù.
¿µ¹® ³»¿ë¿ä¾à This recommendation outlines minimum requirements for timing devices used in synchronous digital hierarchy (SDH) equipments. In normal operation, the SDH equipment clock (SEC) will have multiple reference inputs. In the event that all links between the master and the slave clock fail, the equipment should be capable of maintaining operation (holdover) within prescribed performance limits.
This recommendation defines the minimum requirements for clocks in SDH NEs, and allows for proper network operation when a SEC is timed from another SEC, or a higher quality clock.
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°ü·ÃÆÄÀÏ    TTAE_IT-G813_R1(2005-007).zip TTAE_IT-G813_R1(2005-007).zip
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2019-05-31 À¯Áö ±¹³»¿¡¼­ »ç¿ë ÁßÀÎ ±â¼ú ÂüÁ¶Ç¥ÁØÀÎ ITU-T G.813 (03/2003)¿¡ ´ëÇÑ ¼öÁ¤ ±Ç°í°¡ G.813 (2003) Cor.1 (06/2005) ¹× G.813 (2003) Cor.2 (11/2016)À¸·Î Á¦Á¤µÇ¾úÀ¸³ª º» Ç¥ÁØÀÇ ±â¼úÀû »çÇ׿¡ ¹ÌÄ¡´Â ¿µÇâÀÌ °ÅÀÇ ¾øÀ¸¹Ç·Î °³Á¤ ºÒÇÊ¿äÇÔ.