User`s guide

VoiceFinder AP2120 VoIP Gateway User’s Guide Version 1.00
AddPac Technology Co., Ltd. -
190 -
5.3.6. Configuring 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 5.4, 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 Gateway 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 Gateway 2 (located to the
right of the IP cloud) is (729) 555-xxxx.
[Figure 5-4 Sample VoIP Network]
WAN
10.1.1.2
IP Cloud
PBX
PBX
AP2120
Router 1
AP2120
Router 2
408 115
-
1001
408 116
-
1002
408 117
-
1003
WAN
10.1.1.1
V
o
i
ce
P
or
t
0/0
0/1
Voice Port
729 555
-
1000
V
o
i
ce
P
or
t
0/0
729 555
-
1003
729 555
-
1002
729 555
-
1001