19
20
5.0 OPERATION
Once you have configured each Model 2085RC and connected the
cables, you are ready to operate the units. Section 5.0 describes the
LED status monitors and the power-up procedure.
5.1 LED STATUS MONITORS
The Model 2085RC features front panel LEDs that indicate the con-
dition of the modem and communication link. Figure 6 (below) shows
the positions of the LEDs.
•
The green “PWR” LED glows when power is applied to
the modem through its mid-plane chassis connection.
•
The green “TD” and “RD” LEDs show positive state data
activity. The red “TD” and “RD” LEDs show negative state
data activity. A solid red light indicates an idle state.
•
The green “CD” LED lights when the receive carrier is
detected; the red LED lights when the receive carrier is
absent.
5.2 POWER-UP
There is no power switch on the Model 2085RC: Power is automat-
ically applied to the 2085RC when its card-edge connector touches the
chassis’ mid-plane socket, or when the chassis’ power is turned on.
APPENDIX A
PATTON ELECTRONICS MODEL 2085RC
SPECIFICATIONS
Transmission Format:
Asynchronous
Data Rate:
0 to 115.2 Kbps
Control Signals:
DSR turns “ON” immediately after the
terminal raises DTR; DCD turns “ON”
after recognizing the receive signal
from the line; CTS turns on after the
terminal raises RTS
Transmission Line:
2-wire or 4-wire, unconditioned twisted
pair
Transmit Mode:
Full or half duplex
Transmit Level:
2V ± 10% differential output voltage
Carrier:
Constantly on or controlled by RTS
RTS/CTS Delay:
8 msec or zero
Echo Mode:
Echo and No Echo, supported in both
2-wire and 4-wire modes
Receiver Impedance:
Low (120 ohms), High (100k Ohms)
Line Connection:
RJ-11 or RJ-45 jack
Surge Protection:
Compliant with IEC 801.5 level 2,
1kV
Power Supply:
Rack-mount power supply is
switchable between 120V and 240V
AC; rack chassis supplies 10V AC to
the Model 2085RC, typical
consumption is 700 mW per card
Fuse:
400mA for 120V applications; 200mA
for 240V applications
Temperature Range:
0-50°C (32-122°F)
Altitude:
0-15,000 feet
Humidity:
Up to 95% non-condensing
Dimensions:
0.95”w x 3.1”h x 5.4”l
Figure 6. The Model 2085RC front panel, showing LED positions
Model 2085RC
Power
TD
RD
CD
TD
RD
CD
Unit
A
Unit
B
NOTE:
The 2085RC is a “hot swappable” card—it will not be
damaged by plugging it in or removing it while the rack is pow-
ered up.
