1. Group Web Presentation week 11
How Circuit-Switched Digital Networks work
s1160020 Kotomi Ishida
s1160022 Yuki Izumi
s1160023 Kazuya Ito
s1160026 Masahiro Inoue

2. Outline
This presentation will explain Networks from
viewpoint to circuit switch.
This pattern. (look down)
Sender -> Modem -> Analog local circuits
-> Central Office Switches ->Digital local circuits
->LAN Router Receiver

3. ● Digital access equipment
attached to or inside a router
calls the central office switch.
ISDN equipment uses a
separate 16-megabit channel
for fast-call setup. Other
circuit-switched services use
standard digital tones.

4. ● The dial-up router recognizes
data with a destination outside
the LAN and initiates a call to
a destination selected from a
preprogrammed table.
● Then , central office of every
local telephone company is a
computerized switch that
works with other similar
switches to routes and
complete a call – that's mean
circuit switching

5. ● The central office switch
accepts the incoming call and
makes a digital connection to
the destination.
● The destination could be a
small LAN or a corporate
network.
● The destination router senses
the incoming call and makes a
connection to the LAN