
Dial Services Overview
308621-14.00 Rev 00
1-9
Figure 1-3. Example of Demand Lines, Pools, and Circuits
In Figure 1-3, three circuits share two physical lines that make up demand pool 1.
Note that only two of the circuits using demand pool 1 can be active
simultaneously because only two modems are available. The IP addresses are
associated with each circuit, not with the physical line.
In addition to assigning a demand pool ID to each circuit, you can assign protocol
interfaces and configure phone lists for use with V.25bis, Hayes, and ISDN
signaling. For more information, see Chapter 15, “Customizing Phone Lists.”
Circuit 1 – 192.32.14.1
(the local interface to Los Angeles)
Circuit 2 – 192.32.15.1
(the local interface to Chicago)
Circuit 3 – 192.32.16.1
(the local interface to Dallas)
Dial
device
Chicago
Circuit 2 – 192.32.15.2
Dial
device
Dial
device
New York
Demand pool:
Dial
device
Dial
device
Dallas
Los Angeles
192.32.14.0
Circuit 1 – 192.32.14.2
Circuit 3 – 192.32.16.2
192.32.16.0
192.32.15.0
Line 1
Line 2
Configuration of the New York router:
DS0014A
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