Frame relay and leased phone lines are two of the
physical connection media for setting up the connections.
Advantages of Frame Relay over Leased Phone Line
- Frame relay is a kind of the standardized WAN (wide area
network) technology for specifying the logical link as well as physical link
layers of the digital telecommunication channels.
- It is done by the means of
a packet switching methodology.
- The frame relay technology has been designed
for transportation across the ISDN (integrated services digital network)
infrastructure.
- Today, it is used in the context of a number of network
interfaces.
- Frame relays are commonly implemented for VoFR (voice over frame
relay). - It is used as an encapsulation technique for the data.
- The frame
relays are used between the WANs and the LANS.
- A private line or a leased line
is provided to the user that connects to the frame relay node.
- The frequently changing path is transparent to the WAN protocols used extensively by the end
users.
- Data is transmitted via these networks and the frame relay network
handles all this.
- One advantage of the frame relays over the leased
lines is that they are less expensive and this is what that makes the frame
relays so popular in the telecommunications industry.
- Another advantage of the frame relays over the
leased lines that make them popular is that they have user equipment that can
be configured with extreme simplicity in the frame relay network.
- The usage of
the Ethernet over the fiber optics communication is high.
- This has led to using
the frame relay protocol and encapsulation by the dedicated broadband services
like DSL and cable modem, VPN, MPLS etc.
- However, there are a number of rural
regions in India where there is still an absence of the cable modem and DSL
services.
- In such areas, the only option for the non-dial-up connection is
the frame relay line of 64 Kbit/ s.
- Thus, it might be used by some retail
chain to connect with the WAN of their corporate.
- The aim of the designers of
the frame relay is to offer a telecommunication service for transmitting the
cost efficient data between the various end points in the WAN and the local
area networks in an intermittent traffic.
- The data is put in to units of
variable sizes called the frames by the frame relay process.
- The required error correction process is left up to the end points.
- This error correction
includes re-transmission of the data.
- This increases the speed of the
overall transmission of data.
- A PVC or the permanent virtual circuit is
provided by the network so that when a customer looks at a dedicated connection
and not having to pay for leased line that is full time engaged.
- The route by
which each frame travels to the destined end point is figured out by the
service provider and thus he decides the charges based up on the usage.
- A
level of the service quality can be selected by the enterprise.
- The frames can
be prioritized while the importance of the other frames is reduced.
- The frame
relay can run on systems such as the following:
Ø Fractional
T – 1
Ø Full T –
carrier
Ø E – 1
Ø Full E
carrier
- A frame relay provides mid-range services between
ATM (asynchronous transfer mode) and the ISDN operating at a speed of 128 Kbps.
- Not only it provides the services, it also complements them.
- The base of the
frame relay technology is provided by the X.25 packet switching that has been
designed for data transmission over the analog voice lines.
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