Cisco Cisco Expressway
Configuring the Expressway
Configuring an ENUM Zone and Search Rule
An ENUM zone on the Expressway and its associated search rule are used to construct a query for a DNS server with
NAPTR records that describe how to convert E.164 numbers into one or more URIs.
NAPTR records that describe how to convert E.164 numbers into one or more URIs.
In this deployment scenario, we want to query DNS for NAPTR records based on the number that was dialed, ignoring
any domain information that has been appended. This requires:
any domain information that has been appended. This requires:
■
an ENUM zone configured with a DNS domain suffix to be used for the lookup
■
a search rule that transforms incoming dialed aliases into digit only numbers
To Configure an ENUM Zone:
1.
Go to Configuration > Zones > Zones.
2.
Click New to go to the Create zone page.
3.
Configure the following fields, leaving everything else as its default value:
Name
Enter the name you want to give this zone, for example “ENUM lookup zone”.
Type
Select
ENUM.
DNS suffix
Enter the suffix of the DNS location where the NAPTR records for this ENUM lookup are
held, for example enum.search.com.
held, for example enum.search.com.
H.323 mode
Select
On if the result of the ENUM lookup is allowed to be used to generate an H.323 call.
SIP mode
Select
On if the result of the ENUM lookup is allowed to be used to generate a SIP call.
4.
Click Create zone.
5
Cisco Expressway ENUM Dialing Deployment Guide