VoiceFinder AP200 VoIP Residential Gateway (RGW) User's Guide Version 1.1
5.3.6. Configuration Number Expansion
In most corporate environments, the telephone network is configured so that
you can reach a destination by dialing only a portion (an extension number) of
the full E.164 telephone number. Voice over IP can be configured to recognize
extension numbers and expand them into their full E.164 dialed number by
using two commands in tandem: destination-pattern and num-exp. Before you
configure these two commands, it is helpful to map individual telephone
extensions with their full E.164 dialed numbers. This task can be done easily by
creating a number expansion table.
5.3.6.1.
Number Expansion Table
In Figure 5.7, a small company wants to use Voice over IP to integrate its
telephony network with its existing IP network. The destination pattern (or
expanded telephone number) associated with Router 1 (located to the left of
the IP cloud) are (408) 115-xxxx, (408) 116-xxxx, and (408) 117-xxxx, where xxxx
identifies the individual dial peers by extension. The destination pattern (or
expanded telephone number) associated with Router 2 (located to the right of
the IP cloud) is (729) 555-xxxx.
408 116-1002
AddPac Technology Co.,Ltd.
408 115-1001
AP200
Gateway
Voice Port
1
0/0
PBX
0/1
Voice Port
408 117-1003
Figure 0.5 Sample VoIP Network
729 555-1001
729 555-1000
WAN
IP Cloud
10.1.1.1
729 555-1002
729 555-1003
PBX
Voice Port
0/0
WAN
10.1.1.2
AP200
Gateway
166
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