Connecting Exchange 2007 Unified Messaging and Asterisk open-source telephony

Learn how you can run Exchange Server 2007 Unified Messaging and Asterisk, an open-source IP PBX telephony system, within the same organization.

Exchange Server 2007 Unified Messaging is designed to integrate voice and fax functionality into Exchange Server mailboxes.

If your company is preparing for Exchange 2007 deployment and is already running Asterisk, an open-source IP PBX telephony system, there is a way to make the two systems coexist within the same organization.

VIEW MEMBER FEEDACK TO THIS EXCHANGE 2007 TIP

On his blog, programmer Alan Dutton provides instructions on how to connect Asterisk to Microsoft Exchange 2007 for Unified Messaging, so they'll work side-by-side in the same phone system.

The example documented in the abovementioned article involves running Asterisk as a VMWare image of Trixbox (a Linux distribution with Asterisk pre-installed and pre-configured), and Exchange 2007 with Unified Messaging.

More information on Exchange 2007 Unified Messaging:

Opinion: Why Exchange Unified Messaging is worth paying attention to

A primer on the Exchange 2007 Unified Message Server role

Exchange Server 2007 Reference Center

If someone dials in and connects to Asterisk, and then punches 666666, they'll be forwarded to the Exchange 2007 auto-attendant. If they dial 55, they'll be forwarded to the Exchange 2007 Subscription.

The exact number to dial for each is arbitrary, and I believe it can be changed as long as it doesn't conflict with other commands. (I suspect the author's choice of 666666 is a joke.)

According to Alan Dutton, a few things still don't work yet. For one, caller ID is not passed from SIPX to Exchange Server, so voice messages forwarded in this manner are tagged as "anonymous." Additionally, the instructions for dialing out from Exchange Server are included in the linked article, but have not been tested by the author yet.

About the author: Serdar Yegulalp is editor of Windows Insight, a newsletter devoted to hints, tips, tricks, news and goodies for all flavors of Windows users.

MEMBER FEEDBACK TO THIS EXCHANGE 2007 TIP

There is a much more detailed description of how to access Exchange 2007 Unified Messaging features using the open-source tools Asterisk, Trixbox and sipX.
—Mitja T.

******************************************

I read this article and thought you might be interested in the instructions I wrote about configuring Asterisk and sipX to work with Exchange Server. I built upon Alan's post, clarified a few things, and also fixed a few problems with his instructions.
—Ryan N.

Do you have comments on this tip? Let us know.

Please let others know how useful this tip was via the rating scale below. Do you have a useful Exchange Server or Microsoft Outlook tip, timesaver or workaround to share? Submit it to SearchExchange.com. If we publish it, we'll send you a thank-you gift only an IT geek could love.

This was first published in May 2007

Dig deeper on Microsoft Exchange Server 2007

Pro+

Features

Enjoy the benefits of Pro+ membership, learn more and join.

0 comments

Oldest 

Forgot Password?

No problem! Submit your e-mail address below. We'll send you an email containing your password.

Your password has been sent to:

-ADS BY GOOGLE

SearchWindowsServer

SearchEnterpriseDesktop

SearchCloudComputing

SearchSQLServer

Close