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APPENDIX B
MODEL 2703-X21 PIN CONFIGURATIONS
APPENDIX A
PATTON MODEL 2703 SPECIFICATIONS
Network Interface: G.703
Network Rate: 2.048 Mbps
Network Connectors: Two BNC (75 Ohm) and one
modular RJ-45 connector (120
Ohm)
Terminal Interface: X.21 on female DB-15 connector
Terminal Rate: 2.048 Mbps, 1.024 Mbps, 512 kbps
or 256 kbps
Diagnostics: Loopback Test
Indicators: LEDs for power, network, master
clock and loopback test
Clocking: Internal (Master) or Network
Recovered (Slave) clock
Receiver Sensitivity: -10 dB (0dB = 2.4V)
Power: 85/265 VAC (switch selectable),
50/60 Hz; 85-265 VAC, 50/60 Hz
(universal input option); 48 VDC
(option)
Temperature Range: 0-50°C (32-122°F)
Altitude: 0-15,000 feet
Humidity: 5 to 95% noncondensing
Dimensions: 7.3” x 6.6” x 1.62” (185mm x
168mm x 41mm)
Weight: 2.02 lbs.
15 16
CCITT X.21 INTERFACE (DB-15)
1 FRAME GROUND
2 TRANSMITTED - A
3 CONTROL - A
4 RECEIVE - A
5 INDICATION - A
6 SIGNAL TIMING - A
7
8 SIGNAL GROUND
TRANSMIT B 9
CONTROL B 10
RECEIVE B 11
INDICATION B 12
14
15
SIGNAL TIMING 12
1- Frame Ground
2- Transmit - A
3- Control - A
4- Receive - A
5- Indication - A
6- Signal Timing - A
8- Signal Ground
Transmit - B - 9
Control - B -10
Receive - B -11
Indication - B -12
Signal Timing -B 13