Computer Connection

Home Downloads Order  

Site Map
Tech Info


Site Administration
Computer Connection


Serial to Ethernet Adapter
USB to Serial Adaptr.
Line Cords







Determining which DocuClock to use

Close-up of Centronics Plug

DocuClock is available for Serial or Parallel connection.  The type you choose depends on the port(s) available on the computer to which the DocuClock will be connected.

The most common connection is serial, but check your computer to be sure if you have the port available. If you have a 9 pin male connector on the back of your computer, it is probably a serial port. If you have a 25 hole female connector, it is probably a parallel port.

Serial Port/Connection (RS-232C)
9-pin female
D-Shell connector

A serial port, or hardware interface, is one that transmits just 1 bit at at a time. Most serial ports on personal computers conform to the RS-232C (Short for recommended standard-232C, a standard interface approved by the Electronic Industries Association (EIA) for connecting serial devices.) standards. A serial port is a general-purpose interface that can be used for almost any type of device, including modems, mice, and printers (although most printers are connected to a parallel port).

Serial port/cable interfaces for Windows-based computers usually have  9 pins (or sometimes 25 pins on older computers) and usually have the "male" end on the computer.  The DocuClock Serial printers cable comes with a 9-pin "D-shell" cable with a female cable end.

Parallel Port/Connection (Centronix)
Centronix Connector

Parallel ports are able to transmit more than one bit at a time (that is, it receives several bits in parallel). Most modern printers are parallel.

The DocuClock Parallel printers come with a cable with a Centronix connector for the printer end and  a 25-pin "D-shell" male end for the computer.  Converters are available at electronic and computer stores, if needed.

25-pin D-Sub plug (computer end)

DocuClock Installation Guide
DocuClock Installation Video

DocuClock Product Index
DocuClock Main Page


  Products | Specials | Site Map | Support | Tech Info | Contact | Search | Search
Copyright 2007 Beagle Software. All rights reserved
Last reviewed March 19, 2008