What is a Leased Line?

dedicated line is a service contract concluded between a supplier and a customer, so the supplier undertakes to deliver a line of telecommunications symmetrical long term that connects two or more places in exchange for a monthly rent (hence the lease ). Sometimes it is known as a “private circuit” or “data line” in the UK. 

It is used to link two locations together.

The first location is typically a corporate office. The second location is typically another corporate office, a data centre that’s connected to the Internet or a data centre that’s connected to the company’s existing Wide Area Network.

Leased lines are most commonly rented by businesses to connect branch offices of the organization. Leased lines guarantee bandwidth for network traffic between locations. For example, T1 leased lines are common and offer the same data rate as symmetric DSL. 

Individuals can theoretically rent leased lines for high-speed internet access, but their high cost deters most people, and far more affordable home options are available with higher bandwidth than a simple dial-up phone line, including residential DSL and cable internet broadband service.

Fractional T1 lines, starting at 128 Kbps, reduce this cost somewhat. They can be found in some apartment buildings and hotels.

Using a Virtual Private Network is an alternative technology for using a leased line. VPNs allow an organization to create a virtual and secure connection between locations as well as between those locations and remote clients such as employees

What is a Leased Line Used For?

Businesses use leased lines to…

  • connect to the Internet
  • link PCs and servers in different corporate offices
  • carry phone calls
  • enable staff to connect to their work PCs from home

Unlike traditional lines of the switched telephone network, not have a phone number that each side of the line is permanently connected to the other. Leased lines can be used for telephony, for data services or Internet.

1.) Bandwidth – Latency and jitter issues. A dedicated leased line latency is constant. This can be a critical issue for certain types of applications. Bandwidth uploading a certain POP is undoubtedly a point of variability, but generally much less than consumer – oriented concentrators that can suffer in non-intuitive ways according to periods congestion. 

2.) The consistency of bandwidth – If you rent a DS-3, then you have the bandwidth available at all times and under all circumstances. Even business-grade DSL /cable/services similar to those which are subject to variations in the availability of bandwidth based on usage. There is more bandwidth available in most conditions. 

3) Availability – at least in the United States, traditional leased lines can be anywhere. If your facility is in an industrial park or find something remotely, then, cable / DSL / FIOS can simply not be available at all. This is especially true in many commercial environments where SONET may already be present, but other services are not economically viable for SP. 

4.) The mix of services – Many of SP will provide internet transit bandwidth and WAN private service in the same tube. While this can be accomplished in a shared environment, the best results are often held in the tubes. Also, as old – fashioned as it may seem there is still a lot of use of PRI rule rather than SIP trunks for a lot of phone systems. These can be mapped in a time interval along with other services.

 5.) For the first point, all internet service is multiplexed. That is the point.  In practice, I would usually rather see a straight Ethernet connection running natively or assigned to more than one SONET circuit for sites with important requirements of bandwidth, but there are plenty of cases where traditional SONET framing it is really the only practical solution. 

For consumers who are looking for internet access, a leased line is usually not a feasible option. You can check leased line costs and get an instant quote. There are fast broadband internet connections available that are much more affordable. 

Access to these broadband services varies depending on location. In general, the farther from a populated area you live, the fewer broadband options are available.


Leave a Reply