Book Image

Building Enterprise Ready Telephony Systems with sipXecs 4.0

Book Image

Building Enterprise Ready Telephony Systems with sipXecs 4.0

Overview of this book

Open source telephony systems are making big waves in the communications industry. Moving your organization from a lab environment to production system can seem like a daunting and inherently risky proposition. Building Enterprise Ready Telephony Systems with sipXecs delivers proven techniques for deploying reliable and robust communications systems. Building Enterprise Ready Telephony Systems with sipXecs provides a guiding hand in planning, building and migrating a corporate communications system to the open source sipXecs SIP PBX platform. Following this step-by-step guide makes normally complex tasks, such as migrating your existing communication system to VOIP and deploying phones, easy. Imagine how good you'll feel when you have a complete, enterprise ready telephony system at work in your business. Planning a communications system for any size of network can seem an overwhelmingly complicated task. Deploying a robust and reliable communications system may seem even harder. This book will start by helping you understand the nuts and bolts of a Voice over IP Telephony system. The base knowledge gained is then built upon with system design and product selection. Soon you will be able to implement, utilize and maintain a communications system with sipXecs. Many screen-shots and diagrams help to illustrate and make simple what can otherwise be a complex undertaking. It's easy to build an enterprise ready telephony system when you follow this helpful, straightforward guide.
Table of Contents (17 chapters)
Building Enterprise-Ready Telephony Systems with sipXecs 4.0
Credits
About the Author
About the Reviewer
Preface
Glossary

Utilizing DIDs


A DID (Direct Inward Dialing) is a method that allows companies to own large blocks of telephone numbers that can be allocated to system users or services. DID services are most commonly used with digital circuits such as T1/E1/PRIs but may be available in certain areas on other circuit types.

Just before a call rings in on one of the available channels, the phone number that was dialed is transmitted. T1/E1/PRI gateways that are connected to the sipXecs PBX should then be configured to forward the dialed number to .

Routing the call to a particular user is easily accomplished by adding the DID as an alias on the user account or auto attendant that owns that DID. If the DID is to be used to access other resources on the PBX, consider using a phantom user as shown in the next section.