1 © 2003, Cisco Systems, Inc. All rights reserved. CCNA 4 v3.0 Module 4 ISDN and DDR

222 © 2003, Cisco Systems, Inc. All rights reserved. Objectives ISDN concepts ISDN configuration DDR configuration

333 © 2003, Cisco Systems, Inc. All rights reserved. Digital Communication with ISDN

444 © 2003, Cisco Systems, Inc. All rights reserved. ISDN Benefits

555 © 2003, Cisco Systems, Inc. All rights reserved. ISDN Standards

666 © 2003, Cisco Systems, Inc. All rights reserved. ISDN Access Options

777 © 2003, Cisco Systems, Inc. All rights reserved. ISDN 3-Layer Model

888 © 2003, Cisco Systems, Inc. All rights reserved. Q.931 Messaging-Call Setup Example

999 © 2003, Cisco Systems, Inc. All rights reserved. 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.

10 © 2003, Cisco Systems, Inc. All rights reserved. ISDN Functions and Reference Points

11 © 2003, Cisco Systems, Inc. All rights reserved. ISDN Functions and Reference Points

12 © 2003, Cisco Systems, Inc. All rights reserved. BRI Reference Points

13 © 2003, Cisco Systems, Inc. All rights reserved. Cisco ISDN BRI Interfaces

14 © 2003, Cisco Systems, Inc. All rights reserved. ISDN Interfaces S/T ISDN InterfaceU ISDN Interface

15 © 2003, Cisco Systems, Inc. All rights reserved. ISDN Switch Types

16 © 2003, Cisco Systems, Inc. All rights reserved. Configuring ISDN BRI

17 © 2003, Cisco Systems, Inc. All rights reserved. Configuring ISDN BRI

18 © 2003, Cisco Systems, Inc. All rights reserved. Configuring ISDN PRI

19 © 2003, Cisco Systems, Inc. All rights reserved. Switch Types Available for ISDN PRI Configuration

20 © 2003, Cisco Systems, Inc. All rights reserved. ISDN PRI Examples

21 © 2003, Cisco Systems, Inc. All rights reserved. Verifying ISDN Configuration

22 © 2003, Cisco Systems, Inc. All rights reserved. Troubleshooting ISDN Configuration

23 © 2003, Cisco Systems, Inc. All rights reserved. DDR Operation

24 © 2003, Cisco Systems, Inc. All rights reserved. DDR Operation

25 © 2003, Cisco Systems, Inc. All rights reserved. Configuring Legacy DDR

26 © 2003, Cisco Systems, Inc. All rights reserved. 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

27 © 2003, Cisco Systems, Inc. All rights reserved. Specifying Interesting Traffic

28 © 2003, Cisco Systems, Inc. All rights reserved. Configuring Dialer Information - PPP

29 © 2003, Cisco Systems, Inc. All rights reserved. The dialer-group Command

30 © 2003, Cisco Systems, Inc. All rights reserved. The dialer-map Command

31 © 2003, Cisco Systems, Inc. All rights reserved. The dialer idle-timeout Command

32 © 2003, Cisco Systems, Inc. All rights reserved. Dialer Profiles Overview Define encapsulation and access control lists Determine minimum or maximum calls Turn features on or off

33 © 2003, Cisco Systems, Inc. All rights reserved. Dialer Profile Elements

34 © 2003, Cisco Systems, Inc. All rights reserved. Configuring Dialer Interfaces

35 © 2003, Cisco Systems, Inc. All rights reserved. Verifying DDR show dialer show dialer interface [BRI] show isdn active show isdn status

36 © 2003, Cisco Systems, Inc. All rights reserved. Troubleshooting DDR debug isdn q921 debug isdn q931 debug dialer [events|packets] isdn call interface clear interface bri