User`s guide

Introduction to the HotWire DSLAM
1-8
8000-A2-GB21-10
June 1997
The following illustration shows a detailed view of the network model:
97-15499-01
RTU
Network Service Provider Network Access Provider Service Subscriber
WAN
DSLAM
WAN-C
(Router or
VLAN Switch)
Wiring
Center
Wiring
Center
RTU
RTU
RTU
RTU
ISP
Router
Corporate
Intranet
Router
Internet
Wiring Center
DSL
Access to
Point-of-
Presence
Access to
Point-of-
Presence
 The Service Subscriber is the user (or set of users) that has contracted to
receive networking services (e.g., Internet access, remote LAN access) from
one or more Network Service Providers (NSPs). Service Subscribers may be:
— Residential users connected to public network services (e.g., the Internet)
— Work-at-home users connected to their corporate Intranet
— Commercial users at corporate locations (e.g., branch offices) connected
to other corporate locations in their Intranet or connected to public
network services
RTUs must be installed at the customer premises to provide the Service
Subscriber access to DSLs.
 The Network Access Provider (NAP) is typically the network provider (e.g.,
a Regional Bell Operating Company, an Alternate Local Exchange Carrier)
that has access to the copper twisted pairs over which the DSLs operate. The
NAP provides a transit network service permitting connection of service
subscribers to NSPs.