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COM220 Telephone Modem
SE
12 34 56 78
H
1234
L
DIFF
H
EX1
HL
HL
L
P2
P1
12VG
DC ONLY
CAUTION
LUG
GROUND
POWER IN
WIRING PANEL
CR1000
PERIPHERAL PORT
RS-232 (Not Isolated)
SN:
CS I/O
MADE IN USA
11
109
SE
15 1613
1412
H
L
DIFF
H
EX2
HL
HL
L
EX3
5678
SW-12
5V
12V
12V
C5
C4
G
G
G
G
C1
C2
C3
G
G
C6
C7
C8
Tx
COM1
Rx Tx Rx Tx Rx Tx Rx
COM2
COM3
COM4
POWER OUT
SDM
G 12V
Burial Phone Cable
Blue = Ring
Blue/White = Tip
Phone Line
Transient Protector
(Model 6362 or 2372-01)
SC12 Cable
Earth
Ground
FIGURE 3. CR1000 and COM220 Using Remote Telephone Line
5