RJ-45
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
* The Model 1070RC is not sensitive to polarity
4.4.2 Multipoint Twisted Pair Connection
Figure 11 (below) shows how to wire two-pair cables properly for a
Model 1070RC star topology.
15
16
HOST
FIRST SLAVE
SECOND SLAVE
XMT
RCV
RCV
XMT
RCV
RCV
RCV
XMT
XMT
RCV
XMT
XMT
Figure 11.
Star wiring for Model 1070RC host and slaves
Notice!
Any modular twisted pair cable connected to
the Model 1070RC must be shielded cable, and the outer
shield must be properly terminated to a shielded modular
plug on both ends of the cable.
5.0 OPERATION
Once you have configured each Model 1070RC and connected the
cables, you are ready to operate the units. Section 5.0 describes the
LED status monitors, the power-up procedure, and the use of the built-
in loopback test modes.
5.1 LED STATUS MONITORS
The Model 1070RC features ten front panel status LEDs that
indicate the condition of the modem and communication link. Figure 12
(below) shows the relative front panel positions of the LEDs. Following
figure 12 is a description of each LED's function.
Power
glows green when power is applied to the Model
1070RC front card.
TD & RD
The green "TD" and "RD" indicators blink to show
positive state data activity. The red "TD" and "RD"
indicators blink to show negative state data activity.
Solid red indicates a connection in an idle state.
Cntrl
in
and
glow red to show that either control signal is off.
Cntrl
out
Glow green to show that either control signal is on.
When the 1070RC is connected to a DTE, Control In
will glow green for a positive polarity on Pin 4 (RTS).
Control Out will glow green for an incoming signal
from the line and an outgoing CD signal on RS-232
pin 8.
Test
glows green when the loopback test modes are
activated.
Figure 12.
The Model 1070RC front panel, showing LED positions
Model 1070RC
Power
TD
RD
Cntrl
Out
Test
Cntrl
In
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
RJ-11
RJ-45
