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CCNA 4 Chapter 14
ISDN and DDR
By
PRAVEENKUMAR P.J
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Objectives
ISDN concepts
ISDN configuration
DDR configuration
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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 Model
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Q.931 Messaging
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Call Processing
1. The D channel is used to send the called number to the
localISDN 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. When the remote router indicates that it will receive the
call,the remote ISDN switch uses SS7 to send a call-connect
message to the local switch.5. One B channel is connected
end-to-end, leaving the other B
channel available for a new conversation or data transfer. BothB
channels can be used simultaneously.
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ISDN Functions and
Reference Points
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Reference Points
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BRI Reference Points
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BRI Interfaces
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Interfaces
S/Tinterface
U interface
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Switch Types
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ISDN Configuration
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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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PRI Switch Types
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ISDN PRI Examples
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Verifying ISDN
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Troubleshooting ISDN
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DDR 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 Static Routes
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Specifying Interesting Traffic
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Configuring Dialer - 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
Define encapsulation and access control lists
Determine minimum or maximum calls
Turn features on or off
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Configuring Dialer Interfaces
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Verifying DDR
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] debug dialer events
debug dialer packet
isdn call interface clear interface bri
![Cis TelePresenCo Ce isDn link...ISDN PRI Interface 1 testShutdown ISDN BRI Interface [1..4] testLoopmode ISDN BRI Interface [1..4] testPattern Cisco telePresence ISDN Link Administrator](https://img.pdfslide.us/doc/110x75/6131c5191ecc51586944f1c2/cis-telepresenco-ce-isdn-link-isdn-pri-interface-1-testshutdown-isdn-bri-interface.jpg)
![Integrating Data and Voice Services for ISDN PRI …DDR], and DDR backup) and voice call traffic to occur simultaneously from the supported ISDN PRI interfaces. You can also enable](https://img.pdfslide.us/doc/110x75/5b0a0b677f8b9a99488b944d/integrating-data-and-voice-services-for-isdn-pri-ddr-and-ddr-backup-and-voice.jpg)
