4.4.2 POINT-TO-POINT TWISTED PAIR CONNECTION
The 6-position RJ-11 and 8-position RJ-45 jack options for the
Model 2017RC–always the
upper
jack on the rear interface card–are
prewired for a standard TELCO wiring environment (See
Appendix D
for pin number orientations). Connection of a 4-wire twisted pair circuit
between two or more Model 2017RCs requires a
crossover cable
as
shown in the following charts.
RJ-11 Cable
SIGNAL
PIN#
PIN#
SIGNAL
GND
†
1-----------------------6
GND
†
RCV-
2-----------------------4
XMT-
XMT+
3-----------------------5
RCV+
XMT-
4-----------------------2
RCV-
RCV+
5-----------------------3
XMT+
GND
†
6-----------------------1
GND
†
†
Connection to ground is optional
RJ-45 Cable
SIGNAL
PIN#
PIN#
SIGNAL
GND
†
2-----------------------7
GND
†
RCV-
3-----------------------5
XMT-
XMT+
4-----------------------6
RCV+
XMT-
5-----------------------3
RCV-
RCV+
6-----------------------4
XMT+
GND
†
7-----------------------2
GND
†
†
Connection to ground is optional
13
5.0 OPERATION
Once you have configured each Model 2017RC and connected the
cables, you are ready to operate the units. This section describes the
LED status monitors, and the power-up procedure.
5.1 LED STATUS MONITORS
The Model 2017RC features nine front panel LEDs that indicate
data activity and power status. Figure 7 (below) shows the positions of
the LEDs. Following Figure 7 are functional descriptions of each LED.
Power
glows green when power is applied to the Model
2017RC front card.
TD
(Transmit Data) - indicates status of transmit data
from the DTE. Red indicates a mark or idle state.
Green indicates a space or active state.
RD
(Receive Data) - indicates status of receive data from
the DCE. Red indicates a mark or idle state. Green
indicates a space or active state.
5.2 POWER-UP
There is no power switch on the Model 2017RC: Power is
automatically applied to the 2017RC when its card-edge connector
touches the chassis' mid-plane socket, or when the chassis' power is
turned on.
Note: The 2017RC is a "hot swappable" card—it will not be
damaged by plugging it in or removing it while the rack is powered up.
14
Figure 7.
The Model 2017RC front panel, showing LED positions
Model 2017RC
Power
TD
RD
TD
RD
Unit
A
Unit
B
