A Discussion On Different Types Of Leased Lines On Offer With Co-location Providers

A colocation service can provide a wide selection of leased lines to businesses

. A leased line is always active (i.e. the connection is permanently on), it is not shared and it offers guaranteed bandwidth. Leased lines offer a number of benefits such as fast upstreaming, a permanently-on internet connection and a company being able to smoothly run mission critical applications. There are many different kinds of leased lines to choose from, some of which are detailed below.

One of the most commonly available lines a business can get is an Ethernet leased line. The speed of such a line can be anywhere from 1Mbps to 1Gbps and the line can be used for both point-to-point and point-to-multi-point connections. The great scalability of this line makes it a practical choice for companies looking for a leased line from their server co-location service host. Prices vary depending on the distance between the customer and the nearest Point of Presence (POP). The initial costs associated with this kind of line may be quite expensive but it may ultimately work out much cheaper over the longer term than other line types the co-location host can offer.

A colo provider may offer a Digital Data Service (DDS) line option to its customers, which has a connection speed of 64Kbps to 2Mbps and which is a dedicated point-to-point WAN connection. Generally with these kinds of lines large amounts of data can be transferred at faster speeds with less errors occurring compared to using other types of leased lines.

A business may opt for a Data Access Radial line from a colo host, which provides a point-to-multi-point WAN connection of 64Kbps up to 2Mbps, delivered to X.21, G.703, G.704 and V.35 interfaces.

A common European and Asian line that a colocation service might provide which is used for digitally transmitting over Synchronous Digital Hierarchy is the E1 leased line. It is a point-to-point WAN connection that offers speeds of up to 2Mbps, delivered to an X.21, G.703 or Ethernet interface. 32 channels transmit 64Kbps each to achieve 2Mbps connectivity speed and two channels are kept for signalling and controlling purposes. A similar line in the United States is the T1 line that can transmit up to 1.5 Mbps through 24 channels each carrying 64Kbps. The channels for both the E1 and T1 line can be divided so that some facilitate voice communication whilst others facilitate data communication or instead all channels can be used for fast data transmitting. It is possible to utilise just a few of these individual channels instead of paying for all 32 or 24, and these individual channels are referred to as fractional E1's or T1's.

The lines discussed above are just some of the options a co-location host may provide for a customer. The variability in leased line costs and speeds means that businesses can pick a line within their budget that fulfils their needs. It is important for businesses to check through the Service Level Agreement between them and the leased line colo provider before agreeing to lease the line in order to make sure that all their needs are covered and that they agree with the level of service that the co-location host will give.

by: Dirik Hameed

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