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Basic Dial NMS Implementation Guide
Network Design for a Dial NMS Case Study
Introduction to the Case Study
This case study describes:
How one Internet service provider (ISP) designs, implements, and operates a dial network
management system (NMS) for a dial Internet access service (DIAS).
How to implement dial NMS protocols, applications, and other utilities.
THEnet is an ISP in Austin, Texas that wants to develop a dial NMS and integrate it with its existing
Network Operations Center (NOC). THEnet has two dial point-of-presences (POPs) that provide
dial-up services for the following types of customers:
Residential subscribers
Corporations who outsource their dial-up services and want to avoid the overhead of operating their
own dial POP.
Figure 4 THEnet Operates Two POPs from One NOC
38198
POP #1
POP #2
PSTN
Internet
Redundancy
Remote modem
users
Firewall
NOC
Firewall
Backbone
router
Backbone
router
Intranet
WAN