4.3.2 Connect to a “DCE” Device
Since the Model 1092ARC’s serial port is always wired as a DCE,
you must use a
null modem cable when connecting to another DCE
device such as a CSU/DSU, modem or multiplexer. This cable should
be of the shortest possible length that is appropriate to the interface you
are using. When purchasing or constructing a null modem interface
cable, use the pin diagrams in
Appendix B as a guide.
4.3.3 Connect the Twisted Pair Interface
The Model 1092ARC supports communication between two DTE
devices at distances to 5 miles (8 km) over 24AWG (.5mm) twisted pair
wire. There are two essential requirements for installing the Model
1092ARC:
1. These units work in
pairs. Both units at the end of the twisted
pair must have the same two-wire/four-wire setting. For
instance, if you are operating in two-wire mode, both units
must be in the two-wire setting. Similarly, if you are operating
in four-wire mode, both units must be in the four-wire setting.
2. To function properly, the Model 1092ARC needs one or two
twisted pair of metallic wire. This twisted pair must be
unconditioned, dry, metallic wire, between 19 (.9mm) and 26
AWG (.4mm) (the higher number gauges may limit distance
somewhat). Standard dial-up telephone circuits, or leased
circuits that run through signal equalization equipment, or
standard, flat modular telephone type cable, are
not
acceptable.
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4.2 INSTALL THE MODEL 1092ARC SERIES INTO THE CHASSIS
The Model 1092ARC Series is comprised of a front card and a rear
card. The two cards meet inside the rack chassis and plug into each
other by way of mating 50 pin card edge connectors. Use the following
steps as a guideline for installing each Model 1092ARC Series into the
rack chassis:
1.
Slide the rear card into the back of the chassis along the metal
rails provided.
2.
Secure the rear card using the metal screws provided.
3.
Slide the front card into the front of the chassis. It should
meet the rear card when it’s almost all the way into the
chassis.
4.
Push the front card
gently into the card-edge receptacle of the
rear card. It should “click” into place.
5.
Secure the front card using the thumb screws.
4.3 WIRE THE MODEL 1092ARC SERIES
Each of the rear interface cards compatible with the Model
1092ARC Series has one terminal interface port and one 2-wire/4-wire
(twisted pair) port. For specific interface pin-outs, refer to the diagrams
in the
Appendix of this manual.
.
4.3.1 Connect to a “DTE” Device
Regardless of the interface module you choose, the Model
1092ARC’s serial port is always wired as a DCE. Therefore it “wants”
to plug into a DTE such as a terminal, PC or host. When making the
connection to your DTE device, use a
straight through cable of the
shortest possible length that is appropriate to the interface you are
using. When purchasing or constructing an interface cable, please
refer to the pin diagrams in
Appendix B as a guide.
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