
xiii
Figures
Figure 1-1. Example of Dial Access to a Switched Telephone Network .....................1-2
Figure 1-2. Dial-on-Demand Service ..........................................................................1-4
Figure 1-3. Example of Demand Pools and Circuits ..................................................1-5
Figure 1-4. Additional Lines for a Dial-on-Demand Connection .................................1-7
Figure 1-5. Dial Backup Support in a PSTN ...............................................................1-9
Figure 1-6. Dial Backup Support in an ISDN Network .............................................1-10
Figure 1-7. Bandwidth-on-Demand ..........................................................................1-13
Figure 1-8. Sample Bandwidth-on-Demand Network ...............................................1-15
Figure 2-1. Sample ISDN Network .............................................................................2-1
Figure 2-2. Conceptual Drawing of BRI ......................................................................2-2
Figure 2-3. LAPD Frame ............................................................................................2-4
Figure 2-4. ISDN Interfaces with ISDN Devices .........................................................2-6
Figure 2-5. ISDN Interfaces for Non-ISDN Devices ...................................................2-7
Figure 3-1. Router in an ISDN Network .....................................................................3-4
Figure 3-2. Rate Adaption for a Network with a 56 Kb/s Trunk Line ...........................3-7
Figure 3-3. Rate Adaption for a Switched 56 Kb/s Network .......................................3-7
Figure 3-4. Router A Calls Router B Using CHAP ...................................................3-10
Figure 3-5. Conceptual Drawing of Adjacent Hosts .................................................3-11
Figure 3-6. Dialing an Alternate Router Using IP Unnumbered Interfaces ...............3-19
Figure 3-7. Dialing an Alternate Site Using Demand Circuit Groups .......................3-23
Figure 3-8. Multilink and Bandwidth-on-Demand Operation ....................................3-25
Figure 4-1. Configuration Manager Window ...............................................................4-3
Figure 4-2. Demand Pools Window ............................................................................4-4
Figure 4-3. Demand Pool Configuration Window .......................................................4-4
Figure 4-4. Demand Lines Definition Window for a BLN ............................................4-5
Figure 4-5. Line Media Type Window .........................................................................4-6
Figure 4-6. Lines Marked as Demand, Backup, or Bandwidth ...................................4-7
Figure 4-7. Demand Pools Window Listing Configured Pools ..................................4-10
Figure 4-8. Edit Connector Window ..........................................................................4-10
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