Integrating Alcatel-Lucent OmniPCX and Microsoft Exchange

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Alcatel Lucent and Microsoft

AudioCodes Media Gateways enable Alcatel-Lucent’s enterprise customers to maximize the benefits of a Microsoft Unified Messaging Solution


Alcatel-Lucent is a leading enterprise voice provider with over 20 million Private Branch Exchange (PBX) lines worldwide, with 79,000 employees and operations in more than 130 countries. In recent years, Alcatel-Lucent identified a growing need for its business customers – the efficient and productive integration of their existing communications solutions with other vendors' solutions. In particular, many Alcatel-Lucent customers have already been using the Microsoft Exchange Unified Messaging solution and needed it to be interconnected and synchronized with their Alcatel-Lucent solution.


Alcatel-Lucent faced a key challenge when one of their largest customers in France, a financial institution with hundreds of branches and 15,000 employees, wanted to connect their existing OmniPCX Enterprise Communication Servers (CS) to Microsoft Exchange Servers. The customer required a complete IP based solution which would be certified by both Alcatel-Lucent and Microsoft. To address this challenge, Alcatel-Lucent searched for a partner with the experience and technology to interoperate and integrate between OmniPCX and Microsoft Exchange. While the integration capability was a significant driver, other requirements such as Message Waiting Indicator (MWI) notifications, load sharing and high availability were essential. After a quick survey, it was clear to engineers at Alcatel-Lucent that any implementation of Microsoft SIP Stack in their own OmniPCX would significantly influence the overall project fulfillment and would also require expensive engineering resources.


To solve the challenge involved in integrating the Alcatel-Lucent OmniPCX and Microsoft Exchange Server 2007, Alcatel-Lucent selected AudioCodes Mediant 1000 Multi-Service Business Gateway (MSBG). In this configuration, the Mediant 1000 MSBG with its integrated Enterprise Session Border Controller functionality acts as a back-to-back user agent, resolving interoperability issues between both Alcatel-Lucent and Microsoft's different versions of SIP.

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By providing SIP-to-SIP mediation between OmniPCX and Microsoft Exchange, the Mediant 1000 MSBG enables customers to enjoy additional unified messaging features that were not available prior to the integration. Moreover, even though Microsoft Exchange 2007 does not support MWI notifications, employees using their existing Alcatel-Lucent IP Phones are now able to receive notifications using AudioCodes' Mediant 1000 MSBG which obtains the SIP message notifications from the Geomant MWI server and populates them back into the OmniPCX Enterprise CS.

The Mediant 1000 MSBG is an all-in-one multi-service solution for distributed Enterprises and Service Providers. It is a modular, compact and cost-effective media gateway solution, which has been designed to interface between legacy telephony and IP networks, as well as different types of IP networks in the enterprise. Incorporating AudioCodes' innovative Voice over IP technology, the Mediant 1000 MSBG enables the reliable and cost-effective deployment of Unified Communications networks. Additionally, with Enhanced Voice and Data Security leveraged on an embedded Enterprise-Class Session Border Controller and Firewall, the Mediant 1000 MSBG is an ideal gateway for SIP Trunking and cloud services connectivity.


The system is currently active, handling 720 simultaneous IP-to-IP sessions to the Microsoft Exchange server in load sharing and high availability configuration. This integration enables the connection of Alcatel-Lucent's existing and future versions of OmniPCX Enterprise thus providing customers with investment protection and a future proof joint solution from Alcatel-Lucent and AudioCodes.