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Week11
1. How Circuit-Switched Digital
Networks Work
Central Office Swicthes
High-speed fiber-optic interswitch trunk
Analog local access circuits
Circuit-Switched Digital Networks Work
s1170065 Keita Sano
s1170068 Shintaro Sugiyama
s1170071 Yuki Tanaka
2. Central Office Swicthes
⇨ Central office swi
tch is the generic n
ame for the network
element in the PSTN
that establishes tem
porary connections b
etween two subscribe
rs. It is a voice sw
itch that resides in
the central office
(CO) of an ILEC, CLE
C, or IXC. It can al
so reside in the hub
(STC) or headend, (M
TC) of an MSO.
3. High-speed fiber-optic
interswitch trunk
⇨ A new, high-speed fi
ber-optic network ca
pable of sending the
equivalent of scores
of encyclopedia sets
per second is up and
running in Boulder,
Colo., connecting re
searchers at Boulder
's federal laborator
ies with colleagues
at the University of
Colorado at Boulder
and the City of Boul
der.
4. Analog local access circuits
⇨ In electronics, an i
ntegrated circuit (a
lso known as IC, mic
rocircuit, microchi
p, silicon chip, or
chip) is a miniaturi
zed electronic circu
it (consisting mainl
y of semiconductor d
evices, as well as p
assive components) t
hat has been manufac
tured in the surface
of a thin substrate
of semiconductor mat
erial.
5. Circuit-Switched Digital
Networks Work
⇨ In telecommunication
s, a circuit switchi
ng network is one th
at establishes a cir
cuit (or channel) be
tween nodes and term
inals before the use
rs may communicate,
as if the nodes were
physically connected
with an electrical c
ircuit.
