Comtrol RM III V.90 - Manual (Page 10)

Hardware Installation 10
External Wiring
provides an indication of the maximum number of terminals allowed to be
connected to a telephone interface. The termination on an interface may consist of
any combination of devices, subject only to the requirement that the sum of the
Ringer Equivalence Numbers of all the devices does not exceed 5.
This digital apparatus meets the Class A limits for radio noise for digital
apparatus set out in the interference-causing equipment standard entitled:
“Digital Apparatus,” ICES-003 of Industry Canada.
When connecting the RocketModem III to the telephone service, avoid contact
with the telecommunications lead wire. Grasp the insulated part of the jack, and
do not contact the back of the circuit board. Telephone wiring can carry dangerous
voltages from electrical faults or lightning.
External Wiring Any external communications wiring you may install needs to be constructed to all
relevant electrical codes. In the United States this is the National Electrical Code
Article 800. Contact a licensed electrician for details.
Canada - Return
Center In Canada, contact the following Return Center:
Gandacar Consulting, Ltd
189 Lake Avenue East
Carlton Place, Ontario
Canada K7C 1J7Phone: 800-563-5102
Hardware Specifications
Modem Cables RocketModem III ports use standard telephone-type unshielded twisted-pair
cables with RJ11 modular connectors. These can be purchased anywhere
commercial telephone products are sold.
If you choose to build your own cables, use the
following information. When building cables, use
Category 3 (or better) unshielded twisted-pair
wiring.
The connector pinouts are as shown below:
Environmental
Conditions This table illustrates RocketModem III environmental conditions:
RJ11 Pins Signals
1 and 4 Not used
2 Ring
3 Tip
Pin 1 Pin 4
Environmental Conditions Value
Air temperature:
System on
System off
0 to 45 o C
-20 to 85 o C
Altitude: 0 to 10,000 feet
Humidity (non-condensing):
System on
System off 8% to 80%
20% to 80%
Relative humidity (non-condensing:) 10% to 95%