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CN2
Pin No.
Signal Name
CN2-1
SPKOT
CN2-2
GND
CN3
Pin No.
Signal Name
CN3-1
nETSW
CN3-2
+5VP
CN3-3
GND
CN3-4
+24V
CN3-5
pCMLD
CN3-6
pPLSD
CN3-7
nTSTSW/RMCK
CN3-8
nHSDT/RMCS
CN3-9
nHKOF/RMDT
Destination
Speaker
Speaker
Destination
LCU PCB CN25-1
LCU PCB CN25-2
LCU PCB CN25-3
LCU PCB CN25-4
LCU PCB CN25-5
LCU PCB CN25-6
LCU PCB CN25-7
LCU PCB CN25-8
LCU PCB CN25-9
Signal Waveform
1V
(Max)
-1V
(Max)
Signal Waveform
+5V (H)
FAX Side
0V (L)
Telephone Side
+5V (H)
Make
0V (L)
Break
On Hook
+5V (H)
Off Hook
0V (L)
On Hook
+5V (H)
Off Hook
0V (L)
66
Function
Line Signal, Key Tone, Ringer
Ground
0V
Function
Not Used
+5 VDC Power Supply
+5V
Ground
0V
+24 VDC Power Supply
+24V
Line Switching Relay Drive
Pulse Dial Relay Drive
Not Used
Handset Off-Hook Detection Signal
External Phone Off-Hook Detection Signal
(Phone Line must be connected.)
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Table of Contents
Troubleshooting
