Campbell Scientific COM320 Voice Communications Modem - Manual (Page 28)

COM320 Voice Communications Modem
SE 1 2 3 4 5 6 7 8
H
1 2 3 4
L
DIFF
H EX1 H L H L L P2 P1
12V G
DC ONLY CAUTION
LUG GROUND
POWER IN
WIRING PANEL
CR1000
PERIPHERAL PORT
RS-232 (Not Isolated)
SN:
CS I/O
MADE IN USA
11 10 9 SE 15 16 13 14 12
H L
DIFF
H EX2 H L H L L EX3
5 6 7 8
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
SC12 Cable
Earth
Ground
Telephone Wall
Jack
Earth Ground
FIGURE 4. COM320 Grounding and Alternate 12VDC Power
6.4 Telephone Service
Telephone companies occasionally make changes in their equipment,
operations, or procedures. If you have any questions about your telephone
line, such as how many pieces of equipment you can connect to it, the
telephone company should be able to furnish this information upon request. If
the telephone company requests information from you concerning the
equipment that you have connected to your telephone line, the COM320 label
shows its FCC registration number and ringer equivalence number (REN).
COM320 information pertaining to the FCC and Industry Canada is available
in Appendices B and C.
If any of your telephone equipment is malfunctioning, you should remove it
immediately from the telephone line as it may damage the telephone network.
If the telephone company notices a problem from their end, they may
temporarily discontinue service. They should notify you in advance of
disconnection and give you opportunity to correct the problem. If not feasible,
they should notify you as soon as possible.
If the local phone company does not provide phone-line surge
protection, a Campbell Scientific surge suppressor should be
used. Refer to Section 6.5 for more information. NOTE
22