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Configure Number Expansion
Configuring Voice over IP for the Cisco 3600 Series VC-25
Figure 5 Sample Voice over IP Network
Table 5 shows the number expansion table for this scenario.
Table 5 Sample Number Expansion Table
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:
You can verify the number expansion information by using the show num-exp command to verify
that you have mapped the telephone numbers correctly.
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.
Extension Destination Pattern Num-Exp Command Entry
5.... 40811..... num-exp 5.... 408115....
6.... 40811..... num-exp 6.... 408116....
7.... 40811..... num-exp 7.... 408117....
1... 729555.... num-exp 2.... 729555....
Command Purpose
num-exp
extension-number extension-string Configure number expansion.
408 116-1002
408 115-1001
408 117-1003
729 555-1000 729 555-1003
729 555-1001 729 555-1002
Cisco 3600
Router 1
WAN
WAN
T1 ISDN PRI
T1
ISDN PRI
10.1.1.1
10.1.1.2
IP
cloud
Cisco 3600
Router 2
Voice port 0:D
Voice port
0:D
15586
1:D