19
20
4.3.2 TWISTED PAIR CONNECTION
The Model 1065RC operates over one or two twisted pair. In
all
applications, the twisted pair wire must be 26 AWG or thicker, uncondi-
tioned, dry, metallic wire. Both shielded and unshielded wire yield
favorable results. Note: The Model 1065RC communicates in a
closed data circuit with another Model 1065RC or other compatible
modem. Dial-up analog circuits, such as those used with a standard
Hayes-type modem, are
not acceptable. For further information about
acceptable wire grades, please refer to the diagrams in Appendix B.
Point-to-Point Twisted Pair Connection
The 6-position RJ-11 and 8-position RJ-45 jack options for the
Model 1065RC are prewired for a standard TELCO wiring environment.
Connection of a 4-wire twisted pair circuit between two or more Model
1065RCs requires a
crossover cable as shown in the following dia-
grams.
RJ-11/4-Wire
SIGNAL
PIN#
COLOR
COLOR
PIN#
SIGNAL
GND
†
1
Blue
‡
.................White
6
GND
RCV-
2
Yellow ...............Red
4
XMT-
XMT+
3
Green ...............Black
5
RCV+
XMT-
4
Red ..................Yellow
2
RCV-
RCV+
5
Black ................Green
3
XMT+
GND
6
White ................Blue
1
GND
RJ-45/4-Wire
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
†
Connection to ground is optional
‡
Standard color codes—yours may be different
RJ-11/2-Wire
SIGNAL
PIN#
COLOR
COLOR
PIN#
SIGNAL
XMT+
¹
3
Green
‡
..............Green
3
XMT+
XMT-
4
Red ..................Red
4
XMT-
RJ-45/2-Wire
SIGNAL
PIN#
COLOR
COLOR
PIN#
SIGNAL
XMT+
¹
4
Red
‡
.................Red
4
XMT+
XMT-
5
Green...............Green
5
XMT-
‡
Standard color codes—yours may be different
¹
The Model 1065RC is not sensitive to polarity
AT&T standard modular color codes
4.3.3 Multipoint Twisted Pair Connection
The Model 1065RC supports multipoint applications using a star
topology. Maximum distance between the units will vary based upon
the number of drops, data rate, wire gauge, etc. Call Patton Technical
Support for specific distance estimates. Figures 11 and 12 show how
to wire the one-pair and two-pair cables properly for a Model 1065RC
star topology. Note that the ground connection is not needed.
1 - Blue
2 - Orange
3 - Black
4 - Red
5 - Green
6 - Yellow
7 - Brown
8 - Slate
1 - Blue
2 - Yellow
3 - Green
4 - Red
5 - Black
6 - White