3Com V7122 User Manual page 88

IP to Trunk Group Routing Table
Table 25
Parameter
Destination Phone Prefix
Source Phone Prefix
Source IP Address
Any SIP incoming call whose destination number matches the prefix defined in the 'Destination Phone
Prefix' field and its source number matches the prefix defined in the adjacent 'Source Phone Prefix' field and
its source IP address matches the address defined in the 'Source IP Address' field, is assigned to the trunk
group entered in the field to the right of these fields.
IP to trunk group routing can be performed according to any combination of source /
destination phone prefixes and source IP address, or using each independently.
For available notations that represent multiple numbers (used in the prefix columns), see
Dialing Plan Notation.
Trunk Group ID
Profile ID
Internal DNS Table
The internal DNS table, similar to a DNS resolution, translates hostnames into IP addresses.
This table is used when hostname translation is required (for example, 'Tel to IP Routing'
table). Two different IP addresses can be assigned to the same hostname. If the hostname
isn't found in this table, the gateway communicates with an external DNS server.
Assigning two IP addresses to hostname can be used for alternative routing (using the 'Tel to
IP Routing' table).
To configure the internal DNS table:
Open the 'Internal DNS Table' screen (Protocol Management menu > Routing Tables
1
submenu > Internal DNS Table option); the 'Internal DNS Table' screen is displayed.
88
Description
Each entry in the Destination Phone Prefix fields represents a
called telephone number prefix. The prefix can be 1 to 49 digits
long. An asterisk (*) represents all numbers.
Each entry in the Source Phone Prefix fields represents a calling
telephone number prefix. The prefix can be 1 to 49 digits long. An
asterisk (*) represents all numbers.
Each entry in the Source IP Address fields represents the source IP
address of an IP Tel call (obtained from the Contact header in the
INVITE message).
The source IP address can include the 'x' wildcard to
represent single digits. For example: 10.8.8.xx
represents all the addresses between 10.8.8.10 to
10.8.8.99. The '*' wildcard represents any number
between 0 and 255, for example, 10.8.8.* represents
all addresses between 10.8.8.0 and 10.8.8.255.
In each of the Trunk Group ID fields, enter the trunk group ID to
which calls that match these prefixes are assigned.
Enter the number of the IP profile that is assigned to the routing
rule.
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