Leased lines are point-to-point connections that transmit data between devices through dedicated circuits. They provide reliable, high-speed connections but are more expensive than alternatives like ADSL. There are different types of leased lines including point-to-point, MPLS VPNs, and internet leased lines. While leased lines guarantee bandwidth, newer carrier Ethernet services provide similar functionality at lower speeds over broadband networks.

1. LEASEDLINE

2. CONTENT
 Introduction- Leased Line
 Leased Line Meshes
 History
 Advantages and Disadvantages of Leased Line
 Application
 Types of Leased Lines
- Point to point connection
- MPLS VPN
- Internet Leased Line
 Leased Line Alternatives
 Conclusion
 Acknowledgement

3. INTRODUCTION –
LEASED LINE
 Leased line are basically point to point connection
given on lease basis.
 To transmit the data between computer and
electronic information device we uses a leased
line.
.
Leased line

4.  Leased line are circuits that often goes through multiple
switches and trunk lines. Looks to user like a simple
direct link.
 Leased lines carriers offer leased lines at an attractive
price per bit sent to keep high-volume customers.
Leased line
switch

5.  Leased circuits are provided to subscribers for internal
communication between their offices/factories at
various sites within a city/town or different cities/town
on point to point basis, or on a network basis
interconnecting.
 Analog leased line can provide maximum bandwidth of
9.6 Kbps.
 Digital leased lines can provide bandwidths : 64 Kbps,
2 Mbps, 8 Mbps, 34 Mbps.

6. LEASED LINE MESHES
 If we have several sites, we need a mesh of leased lines
among sites. It is known as leased line meshes.
mesh

7. HISTORY
 Leased lines services (or private line services) became digital
in the 1970s with the conversion of the Bell backbone
network from analog to digital circuits.
 With the extension of digital services in the 1980s, leased
lines were used to connect customer premises to frame
relay or ATM networks.

8. ADVANTAGES AND DISADVANTAGES
OF LEASED LINE
ADVANTAGES –
 Leased Lines are Available at Higher Speeds
 No Slow-Down at Peak Times
 Faster Uploads
 More Reliable
 Business-Class Support

9. DISADVANTAGES –
 Limited range of services - Only Plain Leased
Line Service, Data cards support only up to 64
kbps, no support for N x 64 Kbps.
 From Operator point of view in case of Leased
Line Circuit different boxes from different
vendors so difficult to manage & control.
 No Centralized Monitoring or alarm or
performance monitoring. The solution to this is
MLLN.

10. APPLICATION
 Leased lines are used to build up private networks, private
telephone networks or access the internet or a partner
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.

11. TYPES OF LEASED LINE
 Point to point connection.
 Multi-protocol-level-switching (MPLS ) VPN.
 Internet Leased Line.

12. POINT TO POINT CONNECTION
 A dedicated link through the service providers network.
 This link is not shared with other customers, and
provides a dedicated circuit between two locations.
 It is a permanently established circuit through the
service provider’s switched network, similar to what is
illustrated in the figure below.

15. MPLS VPN
 MPLS VPN stands for MULTIPROTOCOL LABEL
SWITCHING VIRTUAL PRIVATE NETWORK.
 An MPLS Network is formed by connecting each location
with a single link to a service provider MPLS network.

18. INTERNET LEASED LINE
 An Internet Leased Line is usually a dedicated line which
offers direct connectivity to the Internet.
 This is done by connecting the nearest service provider nodal
point and the customer premises with a dedicated copper
line, optical fibre cable, radio links
 Internet Leased Line are preferred over broadband
connections for providing internet connectivity to large
organizations like colleges, corporate offices, hospitals, etc.

19. INTERNET LEASED LINE

20. LEASED LINE ALTERNATIVES
 Leased lines are more expensive than alternative
connectivity services including (ADSL, SDSL, etc.)
because they are reserved exclusively to
the leaseholder.
 Some internet service providers have therefore
developed alternative products that aim to deliver
leased-line type services (carrier Ethernet-based, zero
contention, guaranteed availability), with more
moderate bandwidth, over the standard UK national
broadband network.
 While a leased line is full-duplex, most leased line
alternatives provide only half-duplex or in many cases
asymmetrical service

21. CONCLUSION
 Leased lines cost a lot more than ADSL connections, but for
that extra money you get a dedicated, reliable connection
with good support, and a faster upload speed. You're paying
for quality.
 Leased line problems are usually fixed quicker than ADSL
ones.

22. ACKNOWLEDGEMENT
 Respected Sir and Madam
 My classmates