The Patton Model 305X Series limited distance multiplexers combine two functions into one handy product. First, each Model 305X Series unit is a time division multiplexer (TDM), multiplexing 4, 6 or 8 individual RS-232?or RS-422? devices onto a single composite channel. Second, each Model 305X Series unit is a short range modem, supporting point-to-point communication at distances up to 6,000 ft (1.8 km) over two unconditioned twisted pairs. All Model 305X Series units support end-to-end software flow control, and are equipped with local and remote loopback tests. (The Model 3054 and 3056 also support RTS/CTS hardware flow control.) In addition, diagnostic LEDs show each sub-channel?s status. All data interfaces are ported to modular RJ-45 jacks, and various D-sub adapter cables are available from Patton.

Transmission Lines: Main channel and RS-422 sub-channels,19 to 26 AWG twisted pair; RS-232 sub-channels, flat silver cable
Range: 6000 feet (1.8 km) over twisted pair 24 AWG (.5 mm) between multiplexers; 1000 feet (304 m) on RS-422 sub-channels; 50 feet (15.2 m) on RS-232 sub-channels
Interfaces: Asynchronous RS-232, ITU/CCITT
Data Rates: 0 - 19.2 kbps on sub-channels
Indicators: Transmit Data, Receive Data, Link, Local Loopback, Remote Loop
Test Modes: Local loopback, remote loop
Connectors: RJ-45 female on main & sub-channels
Power Supply: 9-12 Volts AC
Temperature Range: 0-600C (32-1400F)
Altitude: 0-15,000 feet (4.5 km)
Humidity: 5 to 95% non-condensing
Dimensions: 8.5" W x 3.5?L x 1.5?H (21.6 cm x 8.9 cm x 3.8 cm)
Weight: Multiplexer, 4.75 lbs; Power supply, 2.0 lbs
Emissions: FCC part 15 Class A, 89/336/EEC (EN55022)
Immunity: 89/336/EEC (EN50082-1)
Safety: 73/23/EEC (EN60950)