This document discusses the key components and features of circuit-switched digital networks. It describes central office switches which enable temporary connections between network members, dial-up routers which allow multiple computers to access the internet simultaneously, and high-speed intra-switch trunks which increase network performance up to 32 Gbit/sec. It also mentions switching matrices which are a core component of central office switches.

1. How Circuit-Switched Digital Networks Work
Central Off ce Switch
i
Dial-up router
High-speed intra-switch trunk
Feature of a switching matrix

2. Central Office Switch
Central off ce switch is a name for network
i
elements of the PSTN to enable temporary
connection among two members.
This has the switch of some kinds.
And those switches largely evolved the latter period
later in 1800s.

3. Dial-up router
The dial-up router has two functions that access the Internet service
provider and connect to LAN.
It can make some computers to connect to Internet at the same time
without special setting.

4. High-speed intra-switch trunk
Increases network performance with enhanced Inter-
Switch Link (ISL) Trunking, which enables a high-
speed data path up to 32 Gbit/sec.

5. Feature of a switching matrix
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6. References
AE495A
https://h10057.www1.hp.com/ecomcat/hpcatalog/specs/provis
ioner/05/AE495A.htm
Ethrenet Routing Switch Feature Comparison
http://www.nortel.com/products/01/passport/8600/collateral/nn11
E-Words
http://e-words.jp/
Hill Associates Wiki
http://www.hill2dot0.com/wiki/index.php?title=Main_Page