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ENUM Dialing for Outgoing Calls

Configuring Matches for ENUM Zones

If you wish locally registered endpoints to be able to make ENUM calls via the VCS, then at a minimum you should configure an ENUM zone with:

a match that has a Mode of AlwaysMatch

a DNS suffix of e164.arpa (the domain specified by the ENUM standard).

This will result in DNS always being queried for all aliases, not just ENUMs. It will also mean that ENUM dialing will only be successful if the enterprise being dialed uses the e164.arpa domain.

To ensure successful ENUM dialing, you must configure an ENUM zone for each domain that holds NAPTR records for endpoints that callers in your enterprise might wish to dial.

Once these ENUM zones have been created, you can filter the queries that are sent to each as follows:

configure a match that has a Mode of PatternMatch

use the Pattern string and Pattern type fields to define the aliases that will trigger an ENUM lookup.

Example

For example, you want to enable ENUM dialing from your network to a remote office in the UK where the endpoints’ E.164 numbers start with 44. You would configure an ENUM zone on your VCS that has a Match configured as follows:

Mode of PatternMatch

Pattern string of 44

Pattern type of Prefix.

This will result in an ENUM query being sent to that zone only when someone dials a number starting with 44.

Configuring Transforms for ENUM Zones

You can configure transforms for ENUM zones in the same way as any other zones (see Zone Searches and Transforms for full information).

If there are any transforms configured for an ENUM zone, these will be applied prior to the number being converted to an ENUM domain.

Example

For example, you want to enable ENUM dialing from your network to endpoints at a remote site using a prefix of 8 followed by the last 4 digits of the remote endpoints’ E.164 number. You would configure an ENUM zone on your VCS that has a Match configured as follows:

Mode of PatternMatch

Pattern string of 8(\d{4})

Pattern type of Regex

Pattern behavior of Replace

Replace string of 44123123(\1)

With this configuration, it will be the resulting string (i.e. 44123123xxxx) that will then be converted into an ENUM domain and queried for via DNS.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

To verify that you have configured your outward ENUM dialing correctly, use the

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

xCommand Locate command to try and resolve an E.164 alias.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Introduction

 

Getting

 

System

 

System

 

H.323 &

SIP

 

Registration

 

 

Zones and

 

Call

 

Firewall

 

Bandwidth

 

Maintenance

 

Appendices

 

Started

 

Overview

 

Configuration

 

Configuration

 

 

Control

 

 

Neighbors

 

Processing

 

Traversal

 

Control

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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TANDBERG D14049.01 manual Configuring Matches for Enum Zones, Configuring Transforms for Enum Zones