Articles Tagged ‘LPT Port’

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?

Network Cabling

Network CablingNetwork cabling is one of the most important aspects in any network infrastructure and has become increasingly critical with the introduction of newer technologies such as blade servers, virtualization, network storage devices, wireless access points and more.

Network services such as file sharing, Internet access, network printing, email, ERP systems and more, are all delivered to the end users via the network infrastructure, which usually includes switches, fiber optic links and of course UTP cabling.

This series will focus on the different type of Ethernet copper cabling specifications, speeds and caveats of each technology.

We’ll continue with the expansion of our covered topics to cover fiber optic technology and talk about the different fiber optic cables available in the market and then jump back into the past by covering various direct cable connections used to transfer data between computers. This last section will cover extensively serial, parallel, usb ports and their different specifications/versions, plus we’ll get to talk about the variety of cables used to connect between these old-technology ports.

While many might believe the last section of this series might contain information not considered useful (serial, parallel & usb ports), you’ll be amazing on how much of this information will actually come in handy at some point in the future.

All material covered includes detailed diagrams and has been checked to ensure it is as accurate as possible.

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