1 © 2004, Cisco Systems, Inc. All rights reserved. CCNA 4 v3.1 Module 4 ISDN and DDR

222 © 2004, Cisco Systems, Inc. All rights reserved. Objectives

333 © 2004, Cisco Systems, Inc. All rights reserved. Digital Communication with ISDN

444 © 2004, Cisco Systems, Inc. All rights reserved. ISDN Benefits

555 © 2004, Cisco Systems, Inc. All rights reserved. ISDN Standards

666 © 2004, Cisco Systems, Inc. All rights reserved. ISDN Access Options

777 © 2004, Cisco Systems, Inc. All rights reserved. ISDN 3-Layer Model

888 © 2004, Cisco Systems, Inc. All rights reserved. ISDN Physical Layer (BRI)

999 © 2004, Cisco Systems, Inc. All rights reserved. ISDN Data Link Layer

10 © 2004, Cisco Systems, Inc. All rights reserved. Q.931 Messaging-Call Setup Example

11 © 2004, 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.

12 © 2004, Cisco Systems, Inc. All rights reserved. ISDN Functions and Reference Points R:the connection between a non-ISDN Terminal Equipment (TE2) and a Terminal Adapter (TA), e.g. an RS-232 serial interface. S:references 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:electrically 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.

13 © 2004, Cisco Systems, Inc. All rights reserved. ISDN Functions and Reference Points

14 © 2004, Cisco Systems, Inc. All rights reserved. BRI Reference Points

15 © 2004, Cisco Systems, Inc. All rights reserved. Cisco ISDN BRI Interfaces

16 © 2004, Cisco Systems, Inc. All rights reserved. ISDN Interfaces S/T ISDN InterfaceU ISDN Interface

17 © 2004, Cisco Systems, Inc. All rights reserved. ISDN Switch Types

18 © 2004, Cisco Systems, Inc. All rights reserved. Configuring ISDN BRI

19 © 2004, Cisco Systems, Inc. All rights reserved. Configuring ISDN BRI

20 © 2004, Cisco Systems, Inc. All rights reserved. Configuring ISDN PRI

21 © 2004, Cisco Systems, Inc. All rights reserved. ISDN PRI Examples

22 © 2004, Cisco Systems, Inc. All rights reserved. Verifying ISDN Configuration

23 © 2004, Cisco Systems, Inc. All rights reserved. Verifying ISDN Configuration

24 © 2004, Cisco Systems, Inc. All rights reserved. Troubleshooting ISDN Configuration

25 © 2004, Cisco Systems, Inc. All rights reserved. DDR Operation

26 © 2004, Cisco Systems, Inc. All rights reserved. DDR Operation

27 © 2004, Cisco Systems, Inc. All rights reserved. Configuring Legacy DDR

28 © 2004, Cisco Systems, Inc. All rights reserved. Defining Static Routes for DDR

29 © 2004, Cisco Systems, Inc. All rights reserved. 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

30 © 2004, Cisco Systems, Inc. All rights reserved. Specifying Interesting Traffic

31 © 2004, Cisco Systems, Inc. All rights reserved. Configuring Dialer Information - PPP

32 © 2004, Cisco Systems, Inc. All rights reserved. The dialer-group Command

33 © 2004, Cisco Systems, Inc. All rights reserved. The dialer-map Command

34 © 2004, Cisco Systems, Inc. All rights reserved. The dialer idle-timeout Command

35 © 2004, 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

36 © 2004, Cisco Systems, Inc. All rights reserved. Dialer Profile Elements

37 © 2004, Cisco Systems, Inc. All rights reserved. Configuring Dialer Interfaces

38 © 2004, Cisco Systems, Inc. All rights reserved. Configuring Physical Interfaces

39 © 2004, Cisco Systems, Inc. All rights reserved. Verifying DDR show dialer show dialer interface [BRI] show isdn active show isdn status

40 © 2004, Cisco Systems, Inc. All rights reserved. Troubleshooting DDR debug isdn q921 debug isdn q931 debug dialer [events|packets] isdn call interface clear interface bri

41 © 2004, Cisco Systems, Inc. All rights reserved. Summary