
308621-14.00 Rev 00
xxi
Figures
Figure 1-1. Example of Dial Access to a Switched Telephone Network .....................1-3
Figure 1-2. Dial-on-Demand Service ..........................................................................1-7
Figure 1-3. Example of Demand Lines, Pools, and Circuits .......................................1-9
Figure 1-4. Dial-on-Demand Connection over a Frame Relay Network ...................1-10
Figure 1-5. Additional Lines for a Dial-on-Demand Connection ...............................1-13
Figure 1-6. PPP Backup over a PSTN .....................................................................1-17
Figure 1-7. PPP Backup over an ISDN Network ......................................................1-17
Figure 1-8. Link Backup for a Frame Relay Network ................................................1-18
Figure 1-9. Example of Backup Pools, Lines, and Circuits .......................................1-21
Figure 1-10. Example of Bandwidth-on-Demand Service ..........................................1-24
Figure 1-11. Sample Bandwidth-on-Demand Network ...............................................1-27
Figure 2-1. Dialup Menu in the Configuration Manager Window ................................2-5
Figure 3-1. Dial-on-Demand Configuration Hierarchy ................................................3-7
Figure 3-2. Dial Backup Configuration Hierarchy .......................................................3-8
Figure 4-1. Sample ISDN Network .............................................................................4-1
Figure 4-2. BRI Interface ............................................................................................4-2
Figure 4-3. LAPD Frame ............................................................................................4-4
Figure 4-4. Reference Points and Functional Groups for Devices ..............................4-7
Figure 4-5. Reference Points and Functional Groups for Non-ISDN Devices ............4-7
Figure 5-1. Two-Way Authentication ...........................................................................5-2
Figure 5-2. One-Way Authentication ..........................................................................5-3
Figure 5-3. Routers Using CHAP for Authentication ..................................................5-4
Figure 5-4. Using Asynchronous PPP over Modem Lines .........................................5-7
Figure 5-5. Router in an ISDN Network ....................................................................5-10
Figure 5-6. Rate Adaption for a Network with a 56 Kb/s Trunk Line .........................5-17
Figure 5-7. Rate Adaption for a Switched 56 Kb/s Network .....................................5-18
Figure 5-8. X.25 over the D Channel ........................................................................5-19
Figure 6-1. Example of Callback over a Demand Circuit ............................................6-6
Figure 7-1. Dialing an Alternative Router Using Unnumbered IP Interfaces ..............7-3
Kommentare zu diesen Handbüchern