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4.1.1 Two-Wire Cable Connection Via RJ-45
A. The RJ-45 jack on a Model 1065 Series Short Range Modem is
prewired for a standard TELCO wiring environment. To be sure you
have the right wiring, use the table below as a guide.
RJ-45
SIGNAL
1 -------------NC
2 -------------GND
†
3 -------------RCV
4 -------------XMT
5 -------------XMT
6 -------------RCV
7 -------------GND
8 -------------NC
†
Connection to ground is optional
B. Proper wiring of pairs between the two modems is as follows:
SIGNAL
PIN# COLOR* COLOR PIN# SIGNAL
XMT 4 Green ------------Green 4 XMT
XMT 5 Red ---------------Red 5 XMT
*Standard color codes—yours may be different
C. AT&T standard modular color codes:
4.2 FOUR-WIRE INSTALLATION
When communicating over a two twisted pair circuit, the Model
1065 can operate full or half duplex, point-to-point or multipoint. In two
pair point-to-point applications, you will need a
pair
of Model 1065s for
each circuit—one at
each end
of the two pair cable. In two pair multi-
point applications you will need three or more Model 1065 units. These
can be connected using a star topology, although a daisy chain topolo-
gy is usually used.
4.2.1 Four-Wire Cable Connection Via RJ-45
A. The RJ-45 jack on a Model 1065 Short Range Modem is
prewired for a standard TELCO wiring environment. To be sure you
have the right wiring, use the table below as a guide.
RJ-45
SIGNAL
1 -------------NC
2 -------------GND
†
3 -------------RCV
4 -------------XMT
5 -------------XMT
6 -------------RCV
7 -------------GND
8 -------------NC
B. Proper crossing of pairs between the two modems is as fol-
lows:
†
Connection to ground is optional
SIGNAL PIN# COLOR* COLOR PIN# SIGNAL
GND
†
2 Orange ----------Brown 7 GND
RCV 3 Black -------------Green 5 XMT
XMT 4 Red ---------------Yellow 6 RCV
XMT 5 Green ------------Black 3 RCV
RCV 6 Yellow------------Red 4 XMT
GND 7 Brown------------Orange 2 GND
*Standard color codes—yours may be different
†
Connection to ground is optional
1 - Blue
2 - Orange
3 - Black
4 - Red
5 - Green
6 - Yellow
7 - Brown
8 - Slate