Cisco PA-VXA Series, Installation And Configuration Manual

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T1/E1 Digital Voice Port Adapter Installation and Configuration
OL-3592-02
Chapter 4 Configuring the PA-VXA, PA-VXB, and PA-VXC
Configuring Voice over IP
Create a Number Expansion Table
In Figure 4-2 , a small company wants to use VoIP to integrate its telephony network with its existing IP
network. The destination pattern (or expanded telephone number) associated with Router A (located to
the left of the IP cloud) is (408) 555-xxxx, where xxxx identifies the individual dial peers by extension.
The destination pattern (or expanded telephone number) associated with Router B (located to the right
of the IP cloud) is (729) 411-xxxx.
Figure 4-2 Sample VoIP Network
Table 4-2 shows the number expansion table for this scenario.
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 A and Router B.
408 555-2001
408 555-1001
408 555-3001
729 411-5001 729 411-5004
729 411-5002 729 411-5003
Router A
WAN
WAN
T1 ISDN PRI
T1
ISDN PRI
10.1.1.1
10.1.1.2
IP
cloud
Router B
Voice port 0:D
Voice port
0:D
26559
1:D
72xx 72xx
Table 4-2 Sample Number Expansion Table
Extension Destination Pattern num-exp Command Entry
1001 4085551001 num-exp 1001 4085551001
2001 4085552001 num-exp 2001 4085552001
3.... 4085553... num-exp 3... 4085553...
5001 7294115001 num-exp 5001 7294115001
5002 7294115002 num-exp 5002 7294115002
5... 7294115... num-exp 5001 7294115...