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Product Data Sheets (pdf)...Serial to Parallel Converter (38.4 kbps)


Black Box Explains...Advanced printer switches.

Matrix—A matrix switch is a switch with a keypad for selecting one of many input ports to connect to any one of many output ports.

Port-Contention—A port-contention switch is an... more/see it nowautomatic electronic switch that can be serial or parallel. It has multiple input ports but only one output port. The switch monitors all ports simultaneously. When a port receives data, it prints and all the other ports have to wait.

Scanning—A scanning switch is like a port-contention switch, but it scans ports one at a time to find one that’s sending data.

Code-Operated—Code-operated switches receive a code (data string) from a PC or terminal to select a port.

Matrix Code-Operated—This matrix version of the code-operated switch can be an any-port to any-port switch. This means than any port on the switch can attach to any other port or any two or more ports can make a simultaneous link and transfer data. collapse



Product Data Sheets (pdf)...G.703 ClearChannel NTU G.703/G.704 NTU


Product Data Sheets (pdf)...RS-232 to RS-422/485 (Data Only) Converter

  • Manual... 
  • X.21 G.SHDSL Two-Wire Extender/NTU User Manual
    User Manual for the ME231A-R2, ME232A-R2, & ME233A-R2 (Version 1)
 
  • Quick Start Guide... 
  • USB Ultimate Network or Direct Connect Extender QSG
    Quick Start Guide for the IC408A (Version 1)
 

Product Data Sheets (pdf)...ServSwitch Summit

  • Manual... 
  • Modem 3600 Rackmount Card
    Installation and User Guide (Feb-04)
 

Black Box Explains...V.35, the Faster Serial Interface.

V.35 is the ITU (formerly CCITT) standard termed “Data Transmission at 48 kbps Using 60–108 KHz Group-Band Circuits.“

Basically, V.35 is a high-speed serial interface designed to support both higher data... more/see it nowrates and connectivity between DTEs (data-terminal equipment) or DCEs (data-communication equipment) over digital lines.

Recognizable by its blocky, 34-pin connector, V.35 combines the bandwidth of several telephone circuits to provide the high-speed interface between a DTE or DCE and a CSU/DSU (Channel Service Unit/Data Service Unit).

Although it’s commonly used to support speeds ranging anywhere from 48 to 64 kbps, much higher rates are possible. For instance, maximum V.35 cable distances can theoretically range up to 4000 feet (1200 m) at speeds up to 100 kbps. Actual distances will depend on your equipment and cable.

To achieve such high speeds and great distances, V.35 combines both balanced and unbalanced voltage signals on the same interface. collapse

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