Lan Block - Panasonic BB-HCM580A Service Manual

BB-HCM580A
4.4.

LAN Block

Composed of ETHERNET MAC Block inside of the IC102 and the IC105 (ETHER-PHY) on the CPU board, and the T601
(Transformer) and the CN605 (RJ45 jack) on the IO Board.
The T601 (Transformer) obtains isolation between the Set and the Ethernet.
ETHERNET MAC and the IC105 (ETHER-PHY) are connected by a signal called MIIBus and it makes Ether net data sending
and receiving possible.
Sending
The communication data sent from the IC102 is converted to Ethernet signal (100Base-Tx, 10Base-T) at the IC105 and sent
from the CN605 through the T601.
Receiving
The Ethernet signal received from the CN605 is converted to the communication data at the IC105 and received to the IC102.
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