Articles Tagged ‘Direct Cable Connection’

Direct Cable Connection

network direct cable connection and Data transferFrom the early PC days, Direct Cable Connection (DCC) was the most popular way to transfer data from one PC to another. Of course, it might seem a bit of an "old fashioned" way to transfer data these days but remember that back then most PC's were running Dos 6.22 or Windows for Workgroups 3.11 if you were lucky!

Today, all computers are equipped with a network card and using straight-thru or cross-over network cables, we are able to quickly transfer data at speeds much greater than a serial or parallel cable. However , there are still times where we require a transfer via the serial or parallel port, and that's what this page is about.

Transferring data between computers via direct cable connections can be performed using the following methods:

  • Serial Cross-over cable
  • Parallel cable – also known as ‘LapLink’ cables
  • USB Transfer or Data Link cable
  • UTP Cross-over or Straight-thru cable

LPT Ports - Parallel Direct Cable Connection - Pinouts - Transfer speeds

LPT Ports - Parallel Direct Cable Connection - Pinouts - Transfer speedsThe Parallel Direct Connection is the second solution covering the transfer of data from one computer to another. The cable required is slightly more complicated as it has more wires that need to be connected, but the transfer speeds achieved make it well worth the time and effort required to make the cable. We'll also take a look at physical LPT ports, LPT modes (SPP, EPP, ECP), LPT port Pintouts, LPT direct connection cable and more.

Users interested in transferring files using parallel direct cables can visit the following Microsoft support page which explains How to Install and Configure the Direct Cable Connection Feature (https://support.microsoft.com/en-us/kb/298446).

As we’ll see further below, there are three different type of LPT ports, SPP, EPP and ECP, each supporting different speeds and features, but all use the same direct cable connection.

A standard LPT port will provide speeds of 40Kb/s to 60Kb/s while the faster ECP ports will deliver up to 1.1 Mb/sec or 8.8 Mbps.

To better understand why parallel links are much faster than serial links, we’ll need to analyze the way data is transferred. This is clearly shown and explained in the diagram below:

Transfer of Data via Parallel (LPT) Port

Figure 1. Transfer of Data via Parallel (LPT) Port

This diagram shows data transfer via parallel ports and we can see multiple data blocks being simultaneously transferred from one host to another, increasing significantly the overall throughput. Serial ports are capable of transferring one data block per time, therefore unable to match speeds of parallel ports.

What does the parallel port (LPT) look like?

Articles To Read Next:

CCENT/CCNA

Cisco Routers

  • SSL WebVPN
  • Securing Routers
  • Policy Based Routing
  • Router on-a-Stick

VPN Security

  • Understand DMVPN
  • GRE/IPSec Configuration
  • Site-to-Site IPSec VPN
  • IPSec Modes

Cisco Help

  • VPN Client Windows 8
  • VPN Client Windows 7
  • CCP Display Problem
  • Cisco Support App.

Windows 2012

  • New Features
  • Licensing
  • Hyper-V / VDI
  • Install Hyper-V

Linux

  • File Permissions
  • Webmin
  • Groups - Users
  • Samba Setup