Read Panasonic KX-NT551RU-B Service Manual online
8
KX-NT551RU/KX-NT551RU-B
4.2.2.
Reset Circuit
Reset Signal is output from IC101 and input into IC502-pin V12.
4.2.3.
Ethernet Circuit
The PHY IC (IC401) is used for the Ethernet interface.
It is connected from IC401 to the Ethernet port (JK401) through a transformer and so is isolated.
Also, LAN port (JK402) gets power from the Ethernet line for PoE (Power over Ethernet) as shown below.
It is connected between IC401 and the BBIC (IC501) by high-speed bus called MII (Media Independent Interface) bus operating
with 25MHz.
It is connected from IC401 to the Ethernet port (JK401) through a transformer and so is isolated.
Also, LAN port (JK402) gets power from the Ethernet line for PoE (Power over Ethernet) as shown below.
It is connected between IC401 and the BBIC (IC501) by high-speed bus called MII (Media Independent Interface) bus operating
with 25MHz.
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