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Building Enterprise Ready Telephony Systems with sipXecs 4.0

You're reading from Building Enterprise Ready Telephony Systems with sipXecs 4.0

Product type Book

Published in Jul 2009

Publisher Packt

ISBN-13 9781847196804

Pages 314 pages

Edition 1st Edition

Languages

Concepts

Table of Contents (17) Chapters

Building Enterprise-Ready Telephony Systems with sipXecs 4.0

Credits

About the Author

About the Reviewer

1. Preface

1. Introduction to Telephony Concepts and sipXecs

2. System Planning and Equipment Selection

3. Installing sipXecs

4. Configuring Users

5. Configuring Phones in sipXecs

6. Connecting to the World with sipXecs

7. Configuring sipXecs Server Features

8. Using sipXecs—The User Perspective

9. Configuring Advanced sipXecs Features

10. Utilizing the sipXecs ACD Service

11. Maintenance and Security

Glossary

Connecting two sipXecs servers

Two separate sipXecs servers can be configured to be able to dial each other across the Internet or across a WAN.

To enable calling between two (or more) sipXecs PBXs, there are three steps:

1. Make sure each PBX can resolve pertinent DNS records for the other's domain (SRV if you are using SRV).
2. Set up an unmanaged gateway on each PBX pointing to the other PBX.
3. Set up a dial plan used to select the other PBX.

DNS resolution

Each PBX needs to be able to resolve the other server's SIP domain information. The DNS tests described in Chapter 3 must work for the far-side server's domain name.

For example:

sipXecs system 1 has a SIP domain of: boston.xyzcompany.com.

sipXecs system 2 has a SIP domain of: dallas.xyzcompany.com.

System 1 must be able to resolve:

dig -t SRV _sip._udp.dallas.xyzcompany.com
dig -t SRV _sip._tcp.dallas.xyzcompany.com

System 2 must be able to resolve:

dig -t SRV _sip._udp.boston.xyzcompany.com
dig -t SRV _sip._tcp.boston.xyzcompany.com

There...

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