Panasonic DP-3000 Technical Manual page 26

The machine will recover from Sleep Mode by the following conditions.
1. Push on Energy Saver Key
2. Original Sensor Actuated
3. Signal Detected
4. Off-Hook (Handset)
5. Off-Hook (External Telephone)
6. Data Signal from Printer I/F
+5Vp
+5V
FXB
G3B
PRT
PC
+5Vp
Panel
Micro
Computer
Power
External 16Hz
CT1ON CT1ON CT1ON CT1ON
Ex-TEL Off-Hook
HKOF1 HKOF1 HKOF1
Handset Off-Hook
HSDT HSDT HSDT HSDT
OPON OPON OPON OPON
G3B 16Hz
WKUPPC
Set Document
Sensor
PCB
+5Vp
+5V
nP WSAVE nP nP
nMPOFF
n 5VOFF
SC
26
+5V
SH2
nWAKUP0