Model TC1705 Universal Sync/Async Fiber Optic Modem RS-232, RS-422, RS-485 (2-wire or 4-wire), RS-530, V.35 and TTL Features  Product or Application Questions (click here) Data Rates up to 256Kbps Distances Up to 80km*  All Popular Electrical Interfaces Built-In Test Signal Generator Local & Remote Loopback Interchangeable Interface Supports 5 RS-232 Control Signals Multimode & Single Mode Mode (850/1300/1550nm) Built-In Power Redundancy Local Dry Contact Alarm Relay Standalone/Wallmount or Rackmount High Temperature (-20°C to 70°C & -40° to 80°C) Versions Optional                   TC1705 Stand Alone Description                                       The TC1705 is the ultimate "configure-it-as-you-need-it" fiber optic modem.  Ideal for applications requiring multiple interfaces, high data rates or full handshaking, it supports synchronous and asynchronous data rates up to 256Kbps. It supports most popular electrical interfaces including RS-232, RS-422, RS-485 (2-wire or 4-wire), RS-530, V.35 and TTL.  Electrical interfaces are modular and can be easily changed before or after installation. Distances up to 80km* are possible depending on various factors including electrical interface, optical transmitter, number of fiber optic connectors and fiber type and quality.  Power redundancy is standard. Optical redundancy is optional. Diagnostics are extensive and include a built-in Test Signal Generator, local & remote loopback tests and LEDs for Power, Alarm, Tx, Rx and all applicable control signals.  The Test Signal Generator verifies both device and fiber optic link operation.   Available for multimode (850/1300nm) or single mode (1300/1550nm), the TC1705 is compatible with all popular sizes and types of fiber optic cable.  Fiber optic connectors are ST or FC.  Electrical connectors are DB25 female.  Power is standard 12VDC, optional 24VDC, -48VDC, 125VDC or 115/230VAC with an external power cube.  The TC1705 is available in two versions: TC1705R Rackmount Card for installation in a 19" rack assembly (TCRM192 or TCRM196) or TC1705S Standalone version.  Standalone or rackmount versions can be mixed or matched on either end.  There are two optional versions (Model TC1705T)  for extreme temperature applications (-20° to 70°C & -40° to 80°C). *Contact factory for higher requirements (Laser version). TC1705 Specifications     Data Rates RS-232 (Async with RTS, CTS, DCD) up to 128 Kbps RS-232 (Sync) up to 128 Kbps RS-422/530, RS-485, TTL (Async) up to 256 Kbps RS-422/530, V.35 (Sync) up to 256 Kbps Optical Transmitter ELED, ELED, LASER* Receiver PIN Diode Wavelength 850nm, 1300nm Multimode 1300nm, 1550nm Single Mode Fiber Optic Connectors ST, FC or SC Loss Budget* (850nm, 1300nm, 1550nm) Multimode (62.5/125µm): 15dB Single Mode (9/125µm): 20dB Electrical Connector DB25 Female Interface RS-232, RS-422/RS-530, V.35, or TTL System Bit Error Rate 1 in 109 or better Alarm Dry Contact Normal Open * Contact factory for higher requirements Visual Indicators System Status Status, PWR A, PWR B, Vcc, ALARM, ST, SLAVE Electrical Signal Status RD, RT, CTS, SD, TT, RTS Optical Signal Status TX, RX Diagnostic Function Local Loopback Test Power Standard 12VDC @ 500mA Optional 24VDC, -48VDC, or 115/230VAC (with external power cube) Temperature Operating -10° to 50°C Hi-Temp1 (optional) -20° to 70°C Hi-Temp2 (optional) -40° to 80°C Storage -40° to 90°C Humidity 95% non-condensing Physical (Standalone/Wall Mount Unit) Height (3.53 cm) 1.4" Width (18.14 cm) 7.1" Depth (16.57 cm) 6.5" Weight (192 gm) 5.44 oz Applications The TC1705 Multi-Interface Fiber Optic Modem is intended for applications requiring high data rates and handshaking.