Model 278 Fiber modem Specifications

Interface: Electrical - RS-232 Fiber - Multimode full duplex
Signals Supported: TD, RD, RTS, CTS, DSR, DCD, DTR, SG
Speed: Data DC to 115 KBPS Control 1 - RTS/CTS - 14 KBPS Control 2 - DTR/DCP - 14 KBPS
Power: 110V 60Hz, 220V 50Hz optional
Connectors: RS-232 - DB25 male Fiber - ST connectors
Distance: 2 Kms
Wavelength: 830 nm
Power Budget: 12 dB
Switches: DTE/DCE switches, TD/RD, RTS/CTS, and DSR/DCD/DTR as shown below :


Signal DTE Mode DCE Mode
TD Output Input
RD Input Output
RTS Output Input
CTS Input Output
DCD Input Output
DSR * Output
DTR Output Input

*when in the DTE mode DSR is not supported.
Remote Test Switch - performs diagnostics

Indicators: TD, RD, Control In 1, Control Out 1, Control In 2, Control Out 2, Line Error, Fiber Signal Valid, Remote Test and Power
Size: 5"W (127mm) x 1.5"H (12.7mm) x 5.3"D (134.6mm)
Environment: 0 to 50 C, 5% - 95% RH

jump to Fiber Products page

jump to 278 Fiber Modem info page

301-924-7400 EXT 25 / 301-924-7400 EXT 25 / fax 301-924-7403

jump to ... Home Page