1 CCNA 4 v3.1 Module 4

2 CCNA 4 v3.0 Module 4 ISDN and DDR

333 Objectives ISDN concepts ISDN configuration DDR configuration

444 Digital Communication with ISDN

555 ISDN Benefits

666 ISDN Standards

777 ISDN Access Options

888 ISDN 3-Layer Model

999 Q.931 Messaging-Call Setup Example

10 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.

11 ISDN Functions and Reference Points

12 ISDN Functions and Reference Points

13 BRI Reference Points

14 Cisco ISDN BRI Interfaces

15 ISDN Interfaces S/T ISDN InterfaceU ISDN Interface

16 ISDN Switch Types

17 Configuring ISDN BRI

18 Configuring ISDN BRI

19 Configuring ISDN PRI

20 Switch Types Available for ISDN PRI Configuration

21 ISDN PRI Examples

22 Verifying ISDN Configuration

23 Troubleshooting ISDN Configuration

24 DDR Operation

25 DDR Operation

26 Configuring Legacy DDR

27 Defining Static Routes 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

28 Specifying Interesting Traffic – Dialer List

29 Configuring Dialer Information – PPP

30 The dialer-group Command

31 The dialer-map Command

32 The dialer idle-timeout Command

33 Dialer Profiles Overview Define encapsulation and access control lists Determine minimum or maximum calls Turn features on or off

34 Dialer Profile Elements

35 Configuring Dialer Interfaces

36 Verifying DDR show dialer show dialer interface [BRI] show isdn active show isdn status

37 Troubleshooting DDR debug isdn q921 debug isdn q931 debug dialer [events|packets] isdn call interface clear interface bri