Model TC1680 T3/E3 Fiber Optic Modem   TC1680S (shown with Optical Redundancy)    2 X TC1680R in 1U High Rack Mount Card Cage   Features  Product or Application Questions (click here) Compliant with ANSI T.102 - 1987, TR-TSY-000499 and CCITT G.703 Coax input port Receive Equalizer Selectable transmit line build out (LBQ) to accommodate shorter line lengths Low jitter with receive signals retiming at both fiber and coax port Offers laser transmitter a option for fiber optic interface Built-in self and link tests for diagnostic LED indicators on the front panel Description The Model TC1680, T3/E3 Fiber Optic Modem provides a point to point high speed data link between two DS-3 conforming devices. The distance between adapters can be extended up to 30 km with a laser transmitter option. The T3/E3 Model TC1680 adapter is especially valuable for extending your DS-3 circuits to another building on the premises. Besides distance, a fiber optic link offers more advantages than coax for DS-3 Data. A fiber cable has a characteristics of high bandwidth, low loss, less signal distortion, and high noise immunity. It can provide user with a clean, secure link and helps eliminate problems associated with coax cable such as noise, crosstalk and power surges. The Model TC1680 also is a repeater for DS-3 data. Signals received from both fiber and coax port inputs are retimed and reconstructed to reduce jitter and distortion. TC1680 Specifications Data Rates T3 44.736 Mbps E3 34.368 Mbps Optical Transmitter LED/ELED/Laser Diode Receiver PIN Wavelength 850nm/1300nm multimode   1300nm singlemode Fiber Optic connectors ST (FC or SMA optional) Loss Budget 15dB multimode 850nm/1310nm @62.5um   15dB single mode 1310nm @9um   Contact Factory for Higher Loss Budgets Electrical Connector BNC/Coaxial Interface T3/E3 System Bit error rate 1 in l09 or better Power Power source 9 to I2VDC @120ma typical optional: 115 or 230VAC with external power cube Temperature Operating -100C to 500C Storage -400C to 900C Humidity 95% non-condensing Physical Stand Alone Unit Height (3.5cm) 1.40"   Width (18.1cm)7.25"   Depth (25.3cm) 9.85"   Weight (0.83kg) 1.85 lb  Typical Application (Application Questions) The TC1680 is ideal for most T3/E3 connectivity applications up to distances of 100km.  Typical applications include replacing coaxial cable with fiber, extending the point of presence from Telco demarcation points and ATM nodes, transmitting digitized video or linking T3/E3 multiplexers.