Now that you have completed this chapter, you should have a firm
understanding of the following:
- ISDN provides an integrated voice/data capability that uses the
public switched network.
- ISDN components include terminals, TAs, NT devices, and ISDN
switches.
- ISDN reference points define logical interfaces between
functional groupings, such as TAs and NT1s.
- ISDN is addressed by a suite of ITU-T standards, spanning the
physical, data link, and network layers of the OSI reference
model.
- The two most common encapsulation choices for ISDN are PPP and
HDLC.
- ISDN has many uses, including remote access, remote nodes, and
SOHO connectivity.
- There are two ISDN services: BRI and PRI.
- ISDN BRI delivers a total bandwidth of 144 kbps within three separate channels.
- BRI configuration involves the configuration of a BRI interface,
an ISDN switch type, and ISDN SPIDs.
- DDR establishes and releases circuit switched connections as
needed.
 |
 |
Threaded
Case
Study |
|
Washington
School District Project Task: ISDN
In this chapter a new site will be brought into
the network. This site is small and will only
require connectivity from time to time. The
decision has been made to connect it into the WAN
core network using ISDN technology. As part of the
ISDN configuration and implementation, you need to
complete the following tasks:
- Describe how ISDN will be inserted in the
WAN implementation, how data will be sent
across the ISDN link, and the benefits of ISDN
for a small site.
- Document the use of ISDN in the WAN design,
including providing the following:
- A drawing of the implementation with all
major reference points
- A description of overall bandwidth
available to the site and how data
communications will take place
- A description of all data communications
equipment needed to accomplish the
implementation
- Document the router commands needed to
implement ISDN on the router and document the
resulting changes in the local site access
router configurations.
- Apply the CCNA Certification Exam Learning
Objectives to your specific design. This will
require a paragraph on how the learning
objectives relate to your design. Learning
objectives can be grouped together for the
purpose of explanation. In this way, you will
be studying for their CCNA Certification Exam
as you work through the case study.
CCNA Certification Exam Learning Objectives
(*** are explicit CCNA Exam objectives; unmarked
are knowledge assumed by the exam):
General
- Describe the user requirement for
implementing IDSN to a site
- Describe at what layer of a hierarchical WAN
model an ISDN link should be installed
OSI Model
- Define what three layers of the OSI model
ISDN standards address.
IDSN
- Describe the 3 data channels used in ISDN
BRI and describe their functions
- Describe what ISDN protocols that start with
"Q" address
- Describe what ISDN protocols that start with
"I" address
- Describe what ISDN protocols that start with
"E" address
- Describe the five major devices in a ISDN
implementation
- Describe the four major reference points in
an ISDN implementation
- Describe the function of Point to Point
Protocol in an ISDN Implementation
- Describe why it is important to know the
ISDN switch type when configuring an ISDN
connection
- Describe the function of SPID numbers and
why it is important when configuring and ISDN
connection
- State a relevant use and context for ISDN
networking***
- Identify ISDN protocols, function groups,
reference points, and channels***
- Describe Cisco's implementation of ISDN BRI***
|
|
|
|
|