1. © 2006 Cisco Systems, Inc. All rights reserved. ICND v2.3—7-1 Completing ISDN Calls Configuring ISDN BRI and PRI

2. © 2006 Cisco Systems, Inc. All rights reserved. ICND v2.3—7-2 Outline Overview ISDN Overview ISDN Standards ISDN Access Methods ISDN BRI or PRI Call Establishment ISDN Functions and Reference Points Router ISDN Interface Determination ISDN Switch Types ISDN BRI Configuration ISDN PRI Configuration ISDN Configuration Verification ISDN Configuration Troubleshooting Summary

3. © 2006 Cisco Systems, Inc. All rights reserved. ICND v2.3—7-3 What Is ISDN? Voice, data, video, and special services

4. © 2006 Cisco Systems, Inc. All rights reserved. ICND v2.3—7-4 Standards from the ITU-T ISDN Standards

5. © 2006 Cisco Systems, Inc. All rights reserved. ICND v2.3—7-5 ISDN Access Options

6. © 2006 Cisco Systems, Inc. All rights reserved. ICND v2.3—7-6 BRI and PRI Call Processing

7. © 2006 Cisco Systems, Inc. All rights reserved. ICND v2.3—7-7 ISDN Functions and Reference Points Functions are devices or hardware. Reference points are demarcations or interfaces.

8. © 2006 Cisco Systems, Inc. All rights reserved. ICND v2.3—7-8 Cisco ISDN BRI Interfaces

9. © 2006 Cisco Systems, Inc. All rights reserved. ICND v2.3—7-9 Cisco ISDN PRI Interfaces

10. © 2006 Cisco Systems, Inc. All rights reserved. ICND v2.3—7-10 ISDN Switch Types Many providers use many different switch types. Services vary by region and country.

11. © 2006 Cisco Systems, Inc. All rights reserved. ICND v2.3—7-11 Router(config)# isdn switch-type switch-type The command specifies the type of ISDN switch that the router communicates with. Other configuration requirements vary by provider. Step 1: Specify the ISDN switch type. Router(config-if)# isdn switch-type switch-type Configuring ISDN BRI

12. © 2006 Cisco Systems, Inc. All rights reserved. ICND v2.3—7-12 Sets a B-channel SPID, required by many service providers Step 2: (Optional) Setting SPIDs Sets a SPID for the second B channel Router(config-if)# isdn spid1 spid-number [ldn] Router(config-if)# isdn spid2 spid-number [ldn] Configuring ISDN BRI (Cont.)

13. © 2006 Cisco Systems, Inc. All rights reserved. ICND v2.3—7-13 Configuring ISDN PRI Router(config)# isdn switch-type switch-type Router(config)# controller controller slot/port Router(config-controller)# pri-group timeslots range Step 1: Specify the ISDN switch type. Step 2: Select the controller. Step 3: Establish the interface port to function as PRI.

14. © 2006 Cisco Systems, Inc. All rights reserved. ICND v2.3—7-14 ISDN PRI Examples Router(config)# controller T1 3/0 Router(config-controller)# framing esf Router(config-controller)# linecode b8zs Router(config-controller)# pri-group timeslots 1-24 Router(config-controller)# interface Serial3/0:23 Router(config-if)# isdn switch-type primary-5ess Router(config-if)# no cdp enable T1 Sample Configuration Router(config)# controller E1 3/0 Router(config-controller)# framing crc4 Router(config-controller)# linecode hdb3 Router(config-controller)# pri-group timeslots 1-31 Router(config-controller)# interface Serial3/0:15 Router(config-if)# isdn switch-type primary-net5 Router(config-if)# no cdp enable E1 Sample Configuration

15. © 2006 Cisco Systems, Inc. All rights reserved. ICND v2.3—7-15 Verifying the ISDN Configuration Router# show isdn active Router# show isdn status Displays current call information Displays the status of an ISDN connection Router# show interfaces bri0 Displays statistics for the BRI interface that is configured on the router

16. © 2006 Cisco Systems, Inc. All rights reserved. ICND v2.3—7-16 Router# debug ppp authentication Displays the PPP authentication protocol messages Displays information on PPP link establishment Router# debug isdn q921 Shows ISDN Layer 2 messages Shows ISDN call setup and teardown activity (Layer 3) Router# debug isdn q931 Router# debug ppp negotiation Displays protocol errors associated with PPP Router# debug ppp error Troubleshooting the ISDN Configuration

17. © 2006 Cisco Systems, Inc. All rights reserved. ICND v2.3—7-17 Summary ISDN defines a digital architecture that provides integrated voice and data capability through the public switched network. ISDN specifies three standard protocols: E-series, I-series, and Q-series. ISDN specifies two standard access methods, BRI and PRI. To establish an ISDN call, the D channel is used between the routers and the switches. SS7 signaling is used between the switches. ISDN functions are hardware devices, whereas reference points are interfaces between devices. Cisco devices can be physically configured with different ISDN options, which dictate what additional equipment, if any, is needed to run ISDN.

18. © 2006 Cisco Systems, Inc. All rights reserved. ICND v2.3—7-18 Summary (Cont.) You must configure your router to identify the type of switch it will be communicating with, and the type of switch depends in part on the country in which the switch is located. The isdn switch-type and isdn spid commands can be used to enable ISDN BRI. The pri-group command can be used to enable ISDN PRI. The show commands can be used to verify that your ISDN configuration is functioning properly. The debug commands can be used to troubleshoot your ISDN configuration.

19. © 2006 Cisco Systems, Inc. All rights reserved. ICND v2.3—7-19