Applies to: Exchange Server 2010 SP3, Exchange Server 2010 SP2
Topic Last Modified: 2012-10-30
In Microsoft Exchange Server 2010, the Unified Messaging (UM) server role delivers a feature called Voice Mail Preview that uses automatic speech recognition (ASR) to add a text version of the voice mail audio file to voice mail messages. ASR isn't entirely accurate, especially when it's used to record audio over a phone that contains unknown voices and noises. Some organizations require consistently error-free (or near-error-free) transcripts of voice mail messages for some -- if not all -- of their users. The Voice Mail Preview Partner Program helps such organizations meet those requirements.
Voice Mail Preview uses Microsoft speech technologies to provide a text version of audio recordings. The voice mail text is displayed in e-mail messages within Microsoft Office Outlook Web App, Outlook 2010, and in other e-mail programs.
The following examples show how Voice Mail Preview is displayed in Outlook Web App and Outlook 2010:
By default, when you install the Exchange 2010 Unified Messaging server role, the server will send voice mail previews to UM-enabled users if a supported UM language pack is installed.
There are Exchange 2010 Unified Messaging Voice Mail Preview partners that offer enhanced transcription support for the Voice Mail Preview feature. These partners employ people to correct voice mail transcriptions that were created using Automatic Speech Recognition (ASR). Each Voice Mail Preview partner must meet a set of requirements to be certified to interoperate with Exchange 2010 Unified Messaging.
If you determine that the voice mail previews sent to your users aren't accurate enough, you can contact one of the certified Voice Mail Preview partners listed on the Microsoft PinPoint web page and sign up with them at an additional cost.
When an Exchange 2010 Unified Messaging server records the audio for a voice mail message, it uses ASR to create voice mail preview text from the audio file, and then submits the whole voice message to a Hub Transport server for delivery to the user. For each voice message that's created, a Unified Messaging server determines a confidence level for the voice mail preview included with the message. The voice mail system measures how well the sounds in the recording match the words, numbers, and phrases. If the system finds matches easily, the confidence level will be high. A higher level of confidence is generally associated with a higher accuracy.
The accuracy of Voice Mail Preview text is controlled by many factors, and sometimes those factors can't be controlled. However, the text is likely to be more accurate when:
- A simple voice mail is left, and the caller doesn't use slang
terms, technical jargon, or unusual words or phrases.
- The caller uses a language that's easily recognized and
translated by the voice mail system. Generally, voice messages left
by callers who don't speak too quickly or too softly and who don't
have strong accents will produce more accurate sentences and
- The voice message is free of background noise, echoes, and the
audio doesn't drop out.
Most customers who deploy Exchange 2010 Unified Messaging find that the voice mail previews are accurate enough for their users. However, when ASR is applied to recordings made over the phone by unknown voices and background noises, the voice mail preview text usually isn't completely accurate. If the level of confidence is consistently low or the voice mail previews that are received aren't very accurate, you can increase the accuracy of the Voice Mail Previews that users receive as follows:
- Sign up for a voice transcription service from a Voice Mail
Preview partner. For more information about where to find a Voice
Mail Preview partner, see the section "Voice Mail Preview Partners
Certified for Exchange 2010 Unified Messaging" later in this
- After you've signed up with a Voice Mail Preview partner, use
the information provided by the partner to set it up to work with
Unified Messaging. For more information, about how to configure UM
for a Voice Mail Preview partner, see Configure a Voice Mail
Preview Partner on a UM Mailbox Policy.
When you've signed up with a Voice Mail Preview partner, the UM server redirects voice mail messages with the audio file attached to a Voice Mail Preview partner instead of generating Voice Mail Preview text for voice messages and submitting the voice messages to a Hub Transport server. The e-mail message with the Voice Mail Preview text produced by the Voice Mail Preview partner is then submitted to the Hub Transport server for delivery to the recipient's mailbox.
|We recommend that all customers who plan to deploy Unified Messaging obtain the assistance of a Unified Messaging specialist. A Unified Messaging specialist helps you ensure that there's a smooth transition to Exchange 2010 Unified Messaging from a legacy voice mail system. Performing a new deployment or upgrading a legacy voice mail system requires significant knowledge about PBXs and Exchange 2010 Unified Messaging. For more information about how to contact a Unified Messaging specialist, see the Microsoft Exchange Server 2007 Unified Messaging (UM) Specialists Web site.|
Exchange 2010 Unified Messaging Voice Mail Partner Program
To become certified as a Voice Mail Preview partner that interoperates with Exchange 2010 UM, the partner must implement the requirements contained in the Voice Mail Preview Interoperability Specification, and the partner solution must be certified by an independent certification vendor. If you're interested in certifying your transcription service to work with Exchange 2010 Unified Messaging, submit a request to Voice Mail Preview Partners for Exchange 2010 Unified Messaging.
Voice Mail Preview Partners Certified for Exchange 2010 Unified Messaging
If you've already deployed Exchange 2010 Unified Messaging in your organization and you're looking for a certified Voice Mail Preview partner to provide transcription support services, see Independent Software Vendors. These software vendors have been certified as interoperable with Exchange Server 2010.
Configuring Voice Mail Preview Partners
The Exchange 2010 UM server forwards voice mail message with the audio to a dedicated Voice Mail Preview partner solution, which then takes the audio file and creates the Voice Mail Preview text. However, to allow UM-enabled users to receive the Voice Mail Preview with their voice mail message in their mailbox, you must configure a UM mailbox policy, associate users with the UM mailbox policy, and then have the UM-enabled users verify that they can receive voice mail previews in their voice mail messages in Outlook 2010 or Outlook Web App. For more information about Voice Mail Preview with Outlook 2010 and Outlook Web App, see Outlook 2010 and Outlook Web App Features in Unified Messaging. For more information, about how to configure UM for a Voice Mail Preview partner, see Configure a Voice Mail Preview Partner on a UM Mailbox Policy.
IP or Media Gateways and IP PBX Support
Configuring IP gateways and IP PBXs for your organization is a difficult deployment task that must be completed correctly to successfully deploy Exchange 2010 Unified Messaging with a Voice Mail Preview partner. For information that can help you configure your IP gateways and IP PBXs and for the most up-to-date information about how to configure them, see Telephony Advisor for Exchange 2010.
Testing interoperability of Exchange 2010 Unified Messaging with IP gateways has been integrated with the Office Unified Communications Open Interoperability Program. For more information, see Microsoft Unified Communications Open Interoperability Program.