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This service is a
packet mode bearer service delivered by
telecommunication service carriers. Frame Relay
employs a form of packet switching analogous to a
streamlined version of X.25 networks.
A frame relay service accepts packet loss as
acceptable and does not accept full responsibility
for detection and correction of errors. This is a
low cost alternative to X.25 network transmission.
Additionally, this service is most commonly used
when a businesses network requires out of area or
interlata connectivity.
Access to a Frame Relay is over a dedicated, digital
circuit which typically is 56/64 Kbps, T-1 or T-3.
The device which interfaces the user to the network
is in the form of a Frame Relay Access Device (FRAD)
which serves to encapsulate the native PDU before
presenting it to the Network. The FRAD at the
destination address unframes the data before
presenting it to the target device, with the two
FRADs working together much as do PADs in a X.25
environment.
Frame Relay is intended for data communications
applications, most especially LAN-to-LAN
internetworking, which is bursty in nature. A low
cost alternative to high priced "private lines"
FOR DETAILS.... E-MAIL US AT
information@american-digital.net
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ATM SERVICES
ATM is a high
bandwidth, low-delay, connection oriented, packet
like switching and multiplexing technique. Usable
capacity is segmented into 53-byte fixed sized
cells, consisting of header and information fields,
allocating to services on demand. The term
"Asynchronous" applies, as each cell is presented to
the network on a "start-stop" basis - in other words
"asynchronously". The access devices, switched and
interlinking transmission facilities, of course, are
highly synchronized.
ATM is the ultimate service positioned for offering
voice, video, image and multi-media data.
FOR DETAILS.... E-MAIL US AT
information@american-digital.net
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