CCNA 4 v3.1 Module 4 ISDN and DDR

greydullNetworking and Communications

Oct 30, 2013 (3 years and 5 months ago)

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CCNA 4 v3.1 Module 4

ISDN and DDR

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Purpose of This PowerPoint


This PowerPoint primarily consists of the Target
Indicators (TIs) of this module in CCNA version
3.1.


It was created to give instructors a PowerPoint to
take and modify as their own.


This PowerPoint is:

NOT a study guide for the module final assessment.

NOT a study guide for the CCNA certification exam.


Please report any mistakes you find in this
PowerPoint by using the Academy Connection
Help link.

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To Locate Instructional Resource
Materials on Academy Connection:


Go to the Community FTP Center to locate
materials created by the instructor community


Go to the Tools section


Go to the Alpha Preview section


Go to the Community link under Resources


See the resources available on the Class home
page for classes you are offering


Search
http://www.cisco.com



Contact your parent academy!

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Objectives

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Digital Communication with ISDN

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ISDN Benefits

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ISDN Standards

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ISDN Access Options

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ISDN 3
-
Layer Model

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ISDN Physical Layer (BRI)

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ISDN Data Link Layer

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Q.931 Messaging
-
Call Setup Example

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Call Processing

1.
The D channel is used to send the called number to the
local ISDN switch.

2.
The local switch uses the SS7 signaling protocol to set
up a path and pass the called number to the remote
ISDN switch.

3.
The remote ISDN switch signals the destination over the
D channel.

4.
The destination ISDN NT
-
1 device sends the remote
ISDN switch a call
-
connect message.

5.
The remote ISDN switch uses SS7 to send a call
-
connect message to the local switch.

6.
The local ISDN switch connects one B channel end
-
to
-
end, leaving the other B channel available for a new
conversation or data transfer. Both B channels can be
used simultaneously.

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ISDN Functions and Reference Points

R
:

t
he connection between a non
-
ISDN Terminal Equipment

(TE2)
and a Terminal Adapter (TA),
e.g.

an RS
-
232 serial interface.

S
:

r
eferences the points that connect into the customer switching
device Network Termination type 2 (NT2) and enables calls
between the various types of customer premises equipment.

T
:

e
lectrically identical to the S interface, it references the
outbound connection from the NT2 to the ISDN network or
Network Termination type 1 (NT1).

U
:

the connection between the NT1 and the ISDN network owned
by the telephone company.


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ISDN Functions and Reference Points

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BRI Reference Points

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Cisco ISDN BRI Interfaces

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ISDN Interfaces

S/T ISDN Interface

U ISDN Interface

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ISDN Switch Types

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Configuring ISDN BRI

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Configuring ISDN BRI

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Configuring ISDN PRI

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ISDN PRI Examples

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Verifying ISDN Configuration

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Verifying ISDN Configuration

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Troubleshooting ISDN Configuration

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DDR Operation

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DDR Operation

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Configuring Legacy DDR

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Defining
S
tatic
R
outes for DDR

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Static Route Considerations


When configuring static routes, consider
the following:

By default, a static route will take precedence
over a dynamic route because of its lower
administrative distance. Without additional
configuration, a dynamic route to a network
will be ignored if a static route is present in the
routing table for the same network.

To reduce the number of static route entries,
define a summarized or default static route

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Specifying Interesting Traffic

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Configuring Dialer Information
-

PPP

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The
dialer
-
group

Command

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The
dialer
-
map

Command

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The
dialer idle
-
timeout

Command

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Dialer Profiles Overview


Define encapsulation and access control lists


Determine minimum or maximum calls


Turn features on or off

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Dialer Profile Elements

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Configuring Dialer Interfaces

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Configuring Physical Interfaces

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Verifying DDR


show dialer


show dialer interface [BRI]


show isdn active


show isdn status

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Troubleshooting DDR


debug isdn q921


debug isdn q931


debug dialer [events|packets]


isdn call interface


clear interface bri

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Summary