6-1-4. FCE - LIU
CN4
No
Name
Function
V
1
N.C.
No connection
0
2
OH
OH relay control
0
3
INTHK
Internal hook SW detect
5
4
HOOK
Current detect
5
5
RI
Ringing detect
5
6
COM1
Ground
0
7
ONHK
On hook relay control
0
8
LIUSCK
Serial clock and rest
C
9
SOD
Sereal output data
C
10
SID2
Serial input data
C
Note:
"V" is the level of the signal after power on.
C: Clock (0 - 5V)
X: Analog (0 - 5V)
L: Telephone line
6-3
