3Com VCX V7122 User Manual page 56

Table 18 IP to Trunk Group Routing Table
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.
Note that 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.
Note: For available notations that represent multiple numbers (used in the prefix columns), see
Notation on page 50.
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 (e.g., 'Tel to IP Routing' table, etc.).
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, follow these steps:
1
Open the 'Internal DNS Table' screen (Protocol Management menu > Routing Tables
submenu > Internal DNS Table option); the 'Internal DNS Table' screen is displayed.
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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.
Note: 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.
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.
3Com VCX V7122 SIP VoIP Gateway User Manual
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