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1. To function properly, the two Model 2172As must be connected
together using twisted-pair, unconditioned, dry, metal wire, between
19 (0.9mm) and 26 AWG (0.4mm). Leased circuits that run through
signal equalization equipment are not acceptable.
2. The Model 2172A is equipped with an RJ-45 interface jack that can
be used on the CopperLINK interface. The CopperLINK interface is a
two-wire interface. Observe the signal/pin relationships on the Model
2172A's CopperLINK interface jack.
The RJ-45 connector on the Model 2172A's twisted pair interface is
polarity insensitive and is wired for a two-wire interface. The signal/pin
relationship is shown in Figure 3.
Figure 3.
Model 2172A (RJ-45) twisted pair line interface.
3.2 CONNECTING THE 10/100BASE-T ETHERNET INTERFACE
The shielded RJ-45 ports labeled
Ethernet
are the Auto-
MDIX10/100Base-T interface. These ports are designed to connect
directly to a 10/100Base-T network. Figure 4 shows the signal/pin rela-
tionships on this interface. You may connect this port to a hub or PC
using a straight through or crossover cable that is up to 328 ft long.
The Interconnecting cables shall be acceptable for
external use and shall be rated for the proper applica-
tion with respect to voltage, current, anticipated tem-
perature, flammability, and mechanical serviceability.
1 (no connection)
2 (no connection)
3 (no connection)
4 (RING)
5 (TIP)
6 (no connection)
7 (no connection)
8 (no connection)
1
2
3
4
5
6
7
8
CAUTION