Cisco Cisco TelePresence Video Communication Server Expressway

Configuring NAPTR on a DNS server 

A DNS server that can be queried by the Cisco VCS for ENUM lookups needs to be configured with 
NAPTR records containing: 

 

<reverse digit order dotted E164 number> 

 routable address or regular expression to convert 

the dialed number into a routable address + transport specification (SIP or H.323) 

For example, setting up: 

 

557120 to call john.smith@example.com using SIP or H.323 

 

557121 to call mary.jones@example.com using SIP 

 

557122 to call peter.archibald@myco.com using H.323 

The named.conf file specifies (among other things) zones with specific domains and the files (in the 
/var/named

 directory) that specify the zones’ configuration. 

For example:  

zone "enum.search.com." IN { 

        type master; 

        file "enum.enumlookups"; 

}; 

Cisco VCS Deployment Guide: ENUM dialing on Cisco VCS (X5.1) 

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