![](/images/new-backgrounds/1106499/10649925x1.webp)
Configure Number Expansion
Figure 5 Sample Voice over IP Network
|
| 408 |
|
| |||
|
|
|
|
| Cisco 3600 |
| |
|
|
|
|
|
| ||
408 |
|
| Voice port Router 1 |
| |||
|
|
|
|
| 0:D | WAN | |
|
|
|
|
| |||
|
|
|
|
|
|
|
10.1.1.1
1:D
T1 ISDN PRI
408
729 | 729 |
729 | 729 | |||
|
|
| T1 |
|
| ISDN PRI |
| ||
IP |
|
|
| Voice port 0:D |
cloud | WAN |
|
|
|
| 10.1.1.2 |
|
|
|
|
| Cisco 3600 | ||
|
| Router 2 | ||
|
| 15586 |
Table 5 shows the number expansion table for this scenario.
Table 5 | Sample Number Expansion Table |
|
|
|
|
| |
Extension | Destination Pattern | ||
|
|
|
|
5.... | 40811 | 408115.... | |
|
|
|
|
6.... | 40811 | 408116.... | |
|
|
|
|
7.... | 40811 | 408117.... | |
|
|
|
|
1... | 729555.... | 729555.... | |
|
|
|
|
Note You can use the period symbol (.) to represent variables (such as extension numbers) in a telephone number.
The information included in this example needs to be configured on both Router 1 and Router 2.
Configure Number Expansion
To define how to expand an extension number into a particular destination pattern, use the following command in global configuration mode:
Command | Purpose |
Configure number expansion. | |
|
|
You can verify the number expansion information by using the show
After you have configured dial peers and assigned destination patterns to them, you can verify number expansion information by using the show dialplan number command to see how a telephone number maps to a dial peer.
Configuring Voice over IP for the Cisco 3600 Series