19
20
5.0 OPERATION
Once you have configured each Model 1004ABRC 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 1004ABRC features front panel LEDs that indicate the
condition 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 1004ABRC: Power is auto-
matically applied to the 1004ABRC when its card-edge connector
touches the chassis’ mid-plane socket, or when the chassis’ power is
turned on.
APPENDIX A
PATTON ELECTRONICS MODEL 1004ABRC
SPECIFICATIONS
Transmission Format:
Asynchronous
Data Rate:
0 to 115.2 Kbps
Surge Protection:
Silicon Avalanche Diodes
Control Signals:
DSR turns “ON” immediately after the termi-
nal raises DTR; DCD turns “ON” after re-
cognizing 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:
Controlled by data transitions
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:
Silicon Avalanche Diodes on twisted pair
interface from each line to frame ground
Power Supply:
Rack-mount power supply is switchable
between 120V and 240V AC; rack chassis
supplies 10V AC to the Model 1004ABRC,
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 1004ARC front panel, showing LED positions
Model 1004RC
Power
TD
RD
CD
TD
RD
CD
Unit
A
Unit
B
NOTE:
The 1004ABRC is a “hot swappable” card—it will not be
damaged by plugging it in or removing it while the rack is pow-
ered up.
