How Circuit-Switched Digital
Networks Work(p.186~p.187)
s1110228 Yukihiro Yoshida
s1120003 Kei Asakura
s1140058 Ippei Kato

What is circuit-switched?
Circuit-switched is a type of network
in which a physical path is obtained
for and dedicated to a single
connection between two end-points
in the network for the duration of the
connection.

from sender PC
ISDN equipment uses a separate
16-megabit channel for fast-call setup.
Other circuit-switched services use
standard dialing tones.
The dial-up router recognizes data
with a destination outside the LAN
and initiates a call to a destination
selected from a preprogrammed table.

through Central Office
The central office of The central office switch
every local telephone accepts the incoming call
company is a and makes a digital
computerized switch that connection to the
works with other similar destination.
switches to route and
complete a call--that's
where the term circuit
switching comes from.

to receiver PC
The originating router strips off the
Ethernet data and sends TCP/IP
packets across the LAN-to-LAN
connection.The receiving router
pachages the TCP/IP packets into
Ethernet. Client devices on each
LAN can access servers and
services on the other network, but
with reduced speed.

Wikipedia
http://en.wikipedia.org/wiki/Circuit_switching
Search networking.com
http://searchnetworking.techtarget.com/sDefinition/0,,
sid7_gci211787,00.html