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ÇѱÛÇ¥Áظí CSMA/CD Á¢±Ù¹ý ¹× ¹°¸®°èÃþ,°³Á¤:¸Åü ÀÇÁ¸ Á¢¼ÓÀåÄ¡ »ó¿¡¼­ µ¥ÀÌÅÍ ´Ü¸» ÀåÄ¡ Àü¿ø±â¼ú
¿µ¹®Ç¥Áظí Carrier Sense Multiple Access with Collision Detection (CSMA/CD) Access Method and Physical Layer Specifications, Amendment: Data Terminal Equipment (DTE) Power via Media Dependent Interface (DMI)
Çѱ۳»¿ë¿ä¾à º» Ç¥ÁØÀº IEEE 802.3 Ç¥ÁØÀÇ 14, 25 ±×¸®°í 40Àý¿¡ ±â¼úµÈ ¹°¸®°èÃþ Ç¥ÁØÀ» »ç¿ëÇÏ¿© Àü¿ø °ø±ÞÀåÄ¡°¡ Àü¿ø ¼ö±ÞÀåÄ¡¿¡°Ô Àü¿øÀ» °ø±ÞÇϱâ À§ÇÑ ¼±ÅÃÀû Àü¿ø °ø±Þ¿¡ °üÇÑ ±â´É°ú Àü±âÀû ¼º°ÝÀ» ±ÔÁ¤ÇÑ´Ù. º» Ç¥ÁØÀº 10BASE-T, 100BASE-TX, ¶Ç´Â 1000BASE-T ÀåÄ¡°¡ ±âÁ¸ÀÇ ´ÜÀÏ Á¢¼ÓÀåÄ¡¿¡¼­ µ¥ÀÌÅÍÀÇ Àü´Þ°ú ±× µ¥ÀÌÅ͸¦ ó¸®Çϱâ À§ÇÑ Àü¿øÀ» ÇÔ²² °ø±ÞÇÏ´Â °ÍÀ» ±â¼úÇÑ´Ù. ±âÁ¸ ¸ÅüÀÇÁ¸ ÀåÄ¡¿Í´Â º°°³·Î ¼±·Î ³¡ ¶Ç´Â ¼±·Î Áß°£¿¡ Àü¿ø°ø±ÞÀåÄ¡¸¦ »ç¿ëÇÏ¿© ¼±·Î¿¡ Àü¿øÀ» °ø±ÞÇÏ°í Àü¿øÀ» °ø±Þ¹Þ´Â Àü¿ø ¼ö±ÞÀåÄ¡¿¡ °üÇÑ ±â´ÉÀ» ±â¼úÇÑ´Ù. Àü¿ø°ø±ÞÀåÄ¡ °ËÃâ ÇÁ·ÎÅäÄÝÀº Àü¿ø°ø±Þ¿¡ µû¸¥ ºñȣȯ ÀåÄ¡¸¦ º¸È£Çϱâ À§ÇØ ºñȣȯ ÀåÄ¡¿Í Àü¿ø°ø±Þ ȣȯÀåÄ¡¸¦ ±¸º°ÇÏ´Â ±â´ÉÀ» ±â¼úÇÑ´Ù. Àü¿ø°ø±ÞÀåÄ¡´Â Àü¿ø »óŸ¦ ¸ð´ÏÅ͸µÇÏ°í ÀÖ´Ù ´õ ÀÌ»ó Àü¿øÀ» ¿ä±¸Çϰųª ¿ä±¸µÇÁö ¾ÊÀ» ¶§ Àü¿ø Á¦°ÅÇÏ´Â ±â´ÉÀ» ±â¼úÇÑ´Ù.
¿µ¹®³»¿ë¿ä¾à This standard defines the functional and electrical characteristics of two optional power (non-data) entities, a Powered Device (PD) and Power Sourcing Equipment (PSE), for optionally powering via the Power Interface (PI) using physical layers defined in Clauses 14, 25, and 40. This standard describes DTE powering of a 10BASE-T, 100BASE-TX or 1000BASE-T device with a single interface to both the data it requires and the power to process these data. The power Sourcing Equipment (PSE) is located at an endpoint or midspan, separate from the between the Media Dependent Interfaces (MDIs), and provides power to the Powered Device (PD) over the Link Section. The PSE detection protocol distinguishes a compatible PD from non-compatible devices and precludes the application over power and possible damage to non-compatible devices. The PSE monitors the Maintain Power Signature (MPS) and removes power when it is no longer requested or required. Optional management function requirements are specified.
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