Specifications

Configuration Tasks
26
Cisco IOS Release 12.0(3)T
Figure 4 Sample Voice over IP Network
Table 1 shows the number expansion table for this scenario.
Table 1 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 display
the telephone number mapping.
Extension Destination Pattern Num-Exp Command Entry
1... 408555.... num-exp 1... 408555....
2... 408555.... num-exp 2... 408555....
3... 408555.... num-exp 3... 408555....
4... 7294115... num-exp 4.... 7294115...
Command Purpose
num-exp extension-number extension-string Configures number expansion.
408 555-2001
408 555-1001
408 555-3001
729 411-5001 729 411-5004
729 411-5002 729 411-5003
Cisco AS5300
Access
Server 1
WAN
WAN
T1 ISDN PRI
T1
ISDN PRI
10.1.1.1
10.1.1.2
IP
cloud
Cisco AS5300
Access Server 2
Voice port 0:D
Voice port
0:D
10351
1:D