Product Data Sheets (pdf)...CAT6 10G Ethernet Switches (ABC) and (ABCD)
Product Data Sheets (pdf)...Lifetime DB25 Switches ABC Lockable Switches, Key Operated
Product Data Sheets (pdf)...10-Mbps ABC Manual Switch
Black Box Explains... Single-Mode Fiber Optic Cable
Multimode fiber cable has multiple modes of propagation—that is, several wavelengths of light are normally used in the fiber core. In contrast, single-mode fiber cable has only one mode of... more/see it nowpropagation: a single wavelength of light in the fiber core. This means theres no interference or overlap between the different wavelengths of light to garble your data over long distances like there is with multimode cable.
What does this get you? Distanceup to 50 times more distance than multimode fiber cable. You can also get higher bandwidth. You can use a pair of single-mode fiber strands full-duplex for up to twice the throughput of multimode fiber cable. The actual speed and distance you get will vary with the devices used with the single-mode fiber. collapse
Black Box Explains... Printer Sharing with Windows
Product Data Sheets (pdf)...Rackmountable Manual Switches
Unlike the earlier DOS operating systems, Windows® doesnt check to see if the printer is busy at the very beginning of the printing process. Windows will send out data to... more/see it nowstart a job even if the printer is signaling busy or unavailable. If your print sharer doesnt have a buffer, critical printer-initialization information can be lost before your job is started. Once the initialization information is lost, the printer cannot interpret the job correctly.
A buffered print-sharing device is the most practical solution. When Windows starts printing to a buffered port, it thinks its talking directly to the printer, and the critical initialization information is stored by the buffer. The buffer can send out a busy signal to Windows, so it delays sending more information until the buffer is accessible again. collapse