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3.1 CONNECTING THE TWISTED-PAIR LINE INTERFACE
The Model 2157R supports communication between two peer Ethernet
LAN sites over a distance greater than 30,000 ft (9,144 m) over 24 AWG
(0.5 mm) twisted-pair wire.
Note
The Model 2157R uses an auto-rate adaption feature to provide
the fastest data rate possible over the wire and distance of each
Ethernet extension. The actual distance and rate achieved for
Ethernet extension may vary depending on the environment and
type/gauge of the wire used.
Follow the steps below to connect the CopperLink interfaces.
Note
The Model 2157R units work in pairs. One of the units must be
configured as a (L) Local unit, and the other unit must be config-
ured as a (R) Remote unit. It does not matter which end is the L
and which is the R. The link is always initiated by the R unit. As
long as the L unit is powered on, the R unit can establish a link
by being powered on or by having its power reset.
1. To function properly, the two Ethernet Extenders 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 2157R is equipped with an RJ-11 interface. The Copper-
Link interfaces are a two-wire interface. Observe the signal/pin rela-
tionships on the CopperLink interface jack.
The RJ-11 connector on the CopperLink Ethernet Extender’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.
CopperLink Ethernet Extender (RJ-11) twisted pair line interface.
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.
CAUTION
