Sony PCV-E204 Manuale

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System Board
63
Ring Connector
The Ring connector (J20) is a 1 x 2-pin straight header that connects to the 
wake signal (J3) from the fax/modem card to enable the phone ring 
signal to wake the system from the sleep state. 
This permits the system to go into the sleep state while monitoring the 
fax/modem card for a ring signal. Upon receiving an incoming phone or 
fax call, the ring signal on the fax/modem card wakes the system, 
allowing unattended reception of voice or fax messages. 
KY0060.VSD
J20