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4.3.3 Two-Wire Cable Connection Via Terminal Block
The two pin terminal block connector on the Model 1095RC’s
twisted pair interface (TB rear card option) is polarity sensitive.
Connection to the terminal block is made by connecting your two-wire
cable to the connector supplied with your unit. For replacement parts
please see Appendix B.
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4.3.1 Connection to the Twisted Pair Interface
The Model 1095RC 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 1095RC:
1. These units work in
pairs
. Therefore, you must have one
Model 1095RC (or a compatible model) at each end of a sin-
gle twisted pair interface.
2. To function properly, the Model 1095RC needs one twisted
pair of metallic wire. This twisted pair must be
uncondi-
tioned
, dry, metallic wire, between 19 (.9mm) and 26 AWG
(.4mm) (the higher number gauges may limit distance some
what). Standard dial-up telephone circuits, or leased circuits
that run through signal equalization equipment, or standard,
flat modular telephone type cable, are
not acceptable
.
4.3.2 Two-Wire Cable Connection Via RJ-45
1. The RJ-45 connector on the Model 1095RC’s twisted pair
interface is polarity insensitive and is wired for a two-wire
interface.The signal/pin relationships are shown in Figure 11
below.
21
Notice! Any modular twisted pair cable connected to
the Model 1095RC must be shielded cable, and the outer
shield must be properly terminated to a shielded modular
plug on both ends of the cable.
Figure 11. Model 1095RC twisted pair line interface.
1 (N/C)
2 (N/C)
3 (N/C)
4 (Tip)
5 (Ring)
6 (N/C)
7 (N/C)
8 (N/C)
1
2
3
4
5
6
7
8