CSI designs and manufactures Pure Digital Fiberlink® fiber optic transmission systems for video, audio and data, Scan Do® scan converters, Deuce® video scalers and more!
Communications Specialties, Inc. (CSI) offers a comprehensive line of point-to-point and point-to-multipoint fiber optic transmission systems for video, audio and data.
All products within the Pure Digital Fiberlink® line employ all digital processing and signaling, delivering state-of-the-art performance at unparalleled pricing. The original Fiberlink® line uses traditional analog signaling techniques and continues to offer customers a reliable, affordable fiber optic alternative to transmission over coax or copper wire.
Be sure to check out our Fiber Optic Test Equipment!

The Pure Digital Fiberlink® 7250 Series digitally transmits high resolution RGB (up to WUXGA) and stereo audio using two single mode or multimode fiber optic cores at 1310 nm wavelength. The system supports Supports VGA, SVGA, XGA, WXGA, SXGA, SXGA+, UXGA and...
The Pure Digital Fiberlink® 7227 is a receiver with an optical loop-thru for use with any of the 7220 Series transmitters. It offers 4 baseband outputs along with 8 channels of stereo audio and an optical loop-thru.The Pure Digital Fiberlink® 7220 Series...
The Pure Digital Fiberlink® 7226 transmitter offers 12 optical outputs making it simple to distribute VGA and stereo audio signals to multiple destinations. The Pure Digital Fiberlink® 7220 Series digitally transmits high-resolution RGB (up to WXGA) and stereo...
The Pure Digital Fiberlink® 7225 is a receiver for use with any of the 7220 Series transmitters. It offers 1 baseband output along with 2 channels of stereo audio and features an optical loop-thru so that your transmission can continue to another 7220 Series...
The Pure Digital Fiberlink® 7224 transmitter offers 8 optical outputs making it simple to distribute VGA and stereo audio signals to multiple destinations. The Pure Digital Fiberlink® 7220 Series digitally transmits high-resolution RGB (up to...
The Pure Digital Fiberlink® 7223 is a receiver for use with any of the 7220 Series transmitters. It offers 4 baseband outputs along with 8 channels of stereo audio.The Pure Digital Fiberlink® 7220 Series digitally transmits high-resolution RGB (up to WXGA) and...
The Pure Digital Fiberlink® 7222 transmitter offers 4 optical outputs making it simple to distribute VGA and stereo audio signals to multiple destinations. The Pure Digital Fiberlink® 7220 Series digitally transmits high-resolution RGB (up...
The Pure Digital Fiberlink® 7220 Series digitally transmits high-resolution RGB (up to WXGA) and stereo audio over one single mode or multimode fiber optic core at 1310 nm wavelength. Ideal for point-to-point, point-to-multipoint and drop-and-repeat...
The Pure Digital Fiberlink® 7240 Series digitally transmits RGBHV, stereo audio, bidirectional 10Base-T and bidirectional data over one single mode or multimode fiber.Support for VGA, SVGA, XGA and WXGA (640 x 480 up to 1366 x 768 ) and HDTV resolutions of...
The Pure Digital Fiberlink® 7240 Series digitally transmits RGB, stereo audio and 1-way RS type data over one single mode or multimode fiber and is available in both card and box form factors.Support for VGA, SVGA, XGA and WXGA (640 x 480 up to 1366 x 768 )...
The Pure Digital Fiberlink® 7500 Series supports DVI transmission (up to 1920x1200) and stereo audio over one single mode or multimode fiber without compression, scaling or adjustments. The 7502 features two optical outputs so that you may transmit to two 7501...
The Pure Digital Fiberlink® 7500 Series supports DVI transmission (up to 1920x1200) and stereo audio over one single mode or multimode fiber without compression, scaling or adjustments. It is ideal for Digital signage, broadcast or corporate studio,...
The Pure Digital Fiberlink® 3150 Series offers broadcast quality HD/SD-SDI transmission over a single fiber. The 3150 Series is SMPTE compliant ensuring consistent and reliable results, even when connecting through third-party SMPTE 297-2006 devices. Each Pure...
The Pure Digital Fiberlink® Flex System employs pure digital processing and transmission to transmit any combination of video, audio, data and contact closure signals, in one or both directions, over one or two multimode or single mode fiber at 850, 1310 or...
The Pure Digital Fiberlink® 7140 Series digitally transmits four uncompressed video channels and eight independent audio channels over one multimode or single mode fiber at 850, 1310 or 1550 nm. Video channel is compatible with NTSC, PAL or SECAM video...
The Pure Digital Fiberlink® 7130 Series digitally transmits 15 MHz Wideband Video with four independent audio channels over one multimode or single mode fiber at 850, 1310 or 1550 nm using 10-bit video sampling. The video channel is compatible with NTSC, PAL...
The Pure Digital Fiberlink® 7070 Series transmits all formats of component video with two independent audio channels over one multimode or single mode fiber at 850, 1310 or 1550 nm at 14 MHz luminance bandwidth; 7 MHz chrominance bandwidth. The video channel...
The Pure Digital Fiberlink® 7060 Series transmits two S-Video and four independent audio channels transmitted digitally over one multimode or single mode fiber at 850, 1310 or 1550 nm at 7 MHz video bandwidth per channel. The video channel is compatible with...
The Pure Digital Fiberlink® 7050 Series transmits S-Video and two independent audio channels transmitted digitally over one multimode or single mode fiber at 850, 1310 or 1550 nm at 7 MHz video bandwidth per channel. The video channel is compatible with NTSC,...
The Pure Digital Fiberlink® 3440 Series transmits composite video and four independent audio channels Transmits over one multimode or single mode fiber at 850, 1310 or 1550 nm. It is ideal for Videoconferencing, Broadcast and Cable TV and Digital Signage...
The Pure Digital Fiberlink® 7100 Series digitally transmits 15 MHz Wideband Video over one multimode or single mode fiber at 850, 1310 or 1550 nm using 10-bit video sampling. The video channel is compatible with NTSC, PAL or SECAM video standards. Pure...
The Pure Digital Fiberlink® 7040 Series transmits four channels of uncompressed composite video over one multimode or single mode fiber at 850, 1310 or 1550 nm at 7 MHz video bandwidth per channel. The video channel is compatible with NTSC, PAL or SECAM video...
The Pure Digital Fiberlink® 7030 Series transmits two channels of uncompressed composite video over one multimode or single mode fiber at 850, 1310 or 1550 nm at 7 MHz video bandwidth per channel. The video channel is compatible with NTSC, PAL or SECAM video...
The Pure Digital Fiberlink® 3400 Series digitally transmits one or dual channels of composite video single mode or multimode fiber at 850, 1310 or 1550 nm. It is ideal for Broadcast and Surveillance applications. Features: Box version is available for one...
The Pure Digital Fiberlink® 3X3X Series 10 Channel Video Multiplexer transmits all-digital signals over multimode or single mode fiber over one fiber core. Ideal for Security, Remote Monitoring, Command and Control Center applications. Features: No...
The Pure Digital Fiberlink® 5018 Universal Data Transceiver digitally transmits RS-232/422/485 data over multimode or single mode fiber at 850 or 1310 nm. It transmits and receives all standard data-related signals in accordance with EIA specifications. The...
The Pure Digital Fiberlink® 5012 Universal Data Transceiver digitally transmits RS-232/422/485 data over multimode or single mode fiber at 850 or 1310 nm. It transmits and receives all standard data-related signals in accordance with EIA specifications. The...
The Pure Digital Fiberlink® 5002 transmits RS-232 data over standard multimode fiber at 850 nm for simplex, duplex, asynchronous, point-to-point and drop-and-repeat operation. The micro transceiver occupies no more space than a DB-25 connector and supports...
The Pure Digital Fiberlink® 8100 Series distribution amplifier (D.A.) may be configured to transmit up to twelve outputs of any type of signal(s) supported by the Pure Digital Fiberlink® line of products. Its ability to provide...
The Pure Digital Fiberlink® 8100 Series distribution amplifier (D.A.) may be configured to transmit up to twelve outputs of any type of signal(s) supported by the Pure Digital Fiberlink® line of products. Its ability to provide...
The Pure Digital Fiberlink® 8100 Series distribution amplifier (D.A.) may be configured to transmit up to twelve outputs of any type of signal(s) supported by the Pure Digital Fiberlink® line of products. Its ability to provide...
The Pure Digital Fiberlink® 8100 Series distribution amplifier (D.A.) may be configured to transmit up to twelve outputs of any type of signal(s) supported by the Pure Digital Fiberlink® line of products. Its ability to provide...
The Pure Digital Fiberlink® 8100 Series distribution amplifier (D.A.) may be configured to transmit up to twelve outputs of any type of signal(s) supported by the Pure Digital Fiberlink® line of products. Its ability to provide...
The Pure Digital Fiberlink® 8100 Series distribution amplifier (D.A.) may be configured to transmit up to twelve outputs of any type of signal(s) supported by the Pure Digital Fiberlink® line of products. Its ability to provide...
The Pure Digital Fiberlink® 8000 Series distribution amplifier (D.A.) may be configured to transmit from one to four outputs of any type of signal(s) supported by the Pure Digital Fiberlink® line of products. Its ability to provide...
The Pure Digital Fiberlink® 8000 Series distribution amplifier (D.A.) may be configured to transmit from one to four outputs of any type of signal(s) supported by the Pure Digital Fiberlink® line of products. Its ability to provide point-to-multipoint...
The Pure Digital Fiberlink® 6500 Series passive optical splitters allow transmission from a one-way fiber optic transmitter to drive multiple receiver units simultaneously by “splitting” optical power across outputs. It is compatible with all Fiberlink® and...
The Pure Digital Fiberlink® 6500 Series passive optical splitters allow transmission from a one-way fiber optic transmitter to drive multiple receiver units simultaneously by “splitting” optical power across outputs. It is compatible with all Fiberlink® and...
The Pure Digital Fiberlink® 6400 Series passive wave division multiplexers (WDMs) combine two optical signals at different wavelengths onto a single fiber. The systems may be used to transmit two separate optical signals in the same direction or in opposite...
The Pure Digital Fiberlink® 6400 Series passive wave division multiplexers (WDMs) combine two optical signals at different wavelengths onto a single fiber. The systems may be used to transmit two separate optical signals in the same direction or in opposite...
The Pure Digital Fiberlink® 4320 Series digitally transmits thirty-two independent audio channels over one multimode or single mode fiber at 850, 1310 or 1550 nm, with optional redundancy. It is ideal for Rental, Staging, Theater, Stadiums, Theme Parks and...
The Pure Digital Fiberlink® 4160 Series digitally transmits sixteen independent audio channels over one multimode or single mode fiber at 850, 1310 or 1550 nm, with optional redundancy. It is ideal for Rental, Staging, Theater, Stadiums, Theme Parks and...
The Pure Digital Fiberlink® 4040 Series digitally transmits four independent audio channels over one multimode or single mode fiber at 850, 1310 or 1550 nm. It is ideal for Rental, Staging, Education and Broadcast applications. Features: No adjustments; pure...
The Pure Digital Fiberlink® 7400 Series digitally transmits four composite video channels and bidirectional data over multimode or single mode fiber at 850, 1310 or 1550 nm at 7 MHz video bandwidth using one or two fibers. The video channel is compatible with...
The Pure Digital Fiberlink® 7300 Series digitally transmits two composite video channels and bidirectional data over multimode or single mode fiber at 850, 1310 or 1550 nm at 7 MHz video bandwidth using one or two fibers. The video channel is compatible with...
The Pure Digital Fiberlink® 3800 Series transmits Composite Video and Bidirectional Data over multimode or single mode fiber at 850, 1310 or 1550 nm using one or two fibers. The 3800 Series is ideal for Security and Casino applications. Features: No...
The Pure Digital Fiberlink® 3X3X Series 10 Channel Video Multiplexer with 2-Way Data transmits all-digital signals over multimode or single mode fiber over one fiber core. Ideal for Security, Remote Monitoring, Command and Control Center applications....
