UM功能實作和配置技巧(上)--語音郵件、傳真功能

語音郵件的功能: 電話接聽-->接聽電話并錄制語音留言  将語音留言投遞到使用者的郵箱中

                    語音方式的電子郵件通路-->Outlook voice access  Outlook 2007  OWA for Exchange 2007

                    解析來電人電話号碼到通訊簿

                    漏接電話(Missed Call)通知 

目錄搜尋: 以下場景會進行目錄搜尋:

                                           Voice mail 

                                           Fax

                                           Missed call

             撥叫方會提供足夠的資訊

             UM伺服器搜尋AD,并找到被叫方的email位址

             語音留言會以電子郵件的方式,被投遞到被叫方

目錄搜尋的範圍: 撥叫方通過幾種方式提供被叫方資訊-->分機号碼Extension(voice or DTMF)  Email位址字首(voice or DTMF)  姓名(部分或者全部)

                    輸入類型-->DTMF(電話撥号盤): Accepts partial entry which makes the search complex

                                                            Creating DTMF map on the fly and search will take a performance hit -->Every user has a DTMF Mapping  FirstNameLastName,LastNameFirstName,emailAlias

解析Caller ID: UM will try to resolve caller ID for-->Voice mail  Fax  Missed Call Notification

                  UM會從SIP的Invite請求中,擷取Caller-ID

                  In this case UM tries to resolved "3102"  見下圖:

解析Caller - ID: 檢查撥叫方Caller id是否為'null'-->如果是,則使用匿名'anonymous'表示撥叫方

                     如果有Dial Plan資訊-->Dial Plan + caller extension ->search in AD 

                     Check Contact for the 'called' user-->檢查聯系人中的公司電話、家庭電話和手機字段  檢查之前,UM會簡化聯系人中的電話表示方法以便進行搜尋

                     如果以上方式仍然無法解析Caller-ID,則使用匿名'anonymous'表示撥叫方

Caller ID到AD使用者的對應: From--><VoiceMailOriginator> on behalf of <DisplayName>

                                Subject-->VoiceMail/Fax: Exchange Voice Mail(<duration>)<DisplayName>

                                Missed Call Notification: Exchange Missed Call <DisplayName>

Caller ID到聯系人的對應: "From": If personal contact has email address and display name--><VoiceMailOriginator>on behalf of<DisplayName>

                                          If personal contact doesn't have email address but has display name--><VoiceMailOriginator>on behalf of<DisplayName>

                                          If personal contact has email address but no display name--><VoiceMailOriginator>on behalf of <email>[<email>]

Caller ID到聯系人的對應: "SUBJECT": If personal contact has email address and display name-->Exchange Missed Call <DisplayName>  Exchange Voice Mail (<duration>) <DisplayName>

                                               If personal contact doesn't have email address but has display name-->Exchange Missed Call <DisplayName>  Exchange Voice Mail (<duration>) <DisplayName>

                                               If personal contact has email address but no display name-->Exchange Missed Call <email>  Exchange Voice Mail (<duration>) <email>

用語音方式通路郵件: Outlook Voice Access的通路方式-->User calls into a pilot number  Enters Ext + PIN for authentication  Check AD for PIN verification  Check AD for location mailbox  User is connected to mailbox  Check voice mail(as well as email,and calendar)

UM通過IP網關進行電話接聽的過程-->見下圖:

語音郵件送出的過程-->見下圖:

Step 1 - Reach UM server: PBX is configured to route call the voice mail system on certain conditions

                                    Call is routed to gateway

                                    Caller leaves voice mail

                                    Voice mail reaches the UM server

                                    The voce mail is submitted in the 'voicemail' folder in UM server located at $\install directory\Exchange Server\UnifiedMessaging\voicemail' folder.(defined in globcfg.xml)

                                    Each voice message has 2 parts / files --><guild>.txt - header file --><guild>.txt - header file  <guid>.wav - media file

Step 2 - Find a Hub Transport Server: UM has to forward the voice message to hub transport within the same site.

                                                    HT Server is LOCATED irrespective of any voice massage submission.

                                                   UM will get the list of all the HT server within the AD on startup and will update the list every 10 minutes.

                                                   If more than one HT exists it will use round robin to pick one.

                                                   If one HT is down it will pick the next one and mark it down till the next cycle of update. 

                                                  If no HT is available then message is store in the UM server temporary location.

Step 3 - Check mailbox quota: Before submitting the voice mail UM will check user's mailbox quota

                                         If it is over the limit the call will be rejected

                                         Brief window where check may pass but by the time call reaches the user has reached the limit -->Message is treated like NDRs in terms of priority and will be delivered anyway as long as it is not 20% over the limit.

Step 4 - Processing Voice Mail in UM server: The voce mail is submitted in the 'voicemail' folder in UM server located at $\install directory\Exchange Server\UnifiedMessaging\voicemail' folder.(defined in globcfg.xml)

                                                            Each voice message has 2 parts / files --><guild>.txt - header file --><guild>.txt - header file  <guid>.wav - media file

                                                           Resolve Caller ID

                                                           Uses 'transport' dlls to convert the message to .eml file

Step 5 - submit to HT: UM will look for any new header file in the 'voicemail' folder every 30 second and try to submit it to HT

                               When it finds a header file following tasks are performed-->Lock the header file  Read the header and wav file  Create email message and set all the MIME header  Convert the wav file to wma format and attach it to the eml file  Submit the message to Hut transport using SMTP.

                              Delete the header file and attachment after submission.

                              DSN option will be set to 'never' so that voice mail do not generate

語音方式通路郵件的流程: Using Subscriber Access-->Calls the pilot number and enters PIN  User selects option to check voice mail  UM will use XSO  Query messages with class IPM.NOTE.MICROSOFT.EXCHANGE.VOICE.CA

語音留言的播放 - Play on Phone: Available in Outlook 2007 and OWA for Ex2007  Generates an outbound call  By default it is set to users extension  Utilizes UM Web Service in CAS server

UM Web Service的作用: Installed in CAS server:Used for-->Retrieve and set UM options  Reset PIN  Make outbound calls  Retrieve call status  Disconnect a Call 

                                                              Talks to UM server using SIP protocol

UM伺服器接受傳真: Each user assigned an additional extension to receive fax message  Use the same extension as voice mail  Shared resource

CNG音頻:1100Hz  half second in length  Repeats every 3.5 seconds for 45 seconds  見下圖:

傳真的呼叫流程: Detect in bound Fax call  Executing the Fax Protocol  Capture the Fax as tiff  Deliver the Fax message to user's mailbox  見下圖:

執行傳真協定 - Intel PIMG: Gateway detects the CNG  Gateway sends CNG tone to UM server  UM server detects the CNG tone and sends a SIP re INVITE for fax call  New T.38 channel is created for data transfer

配置傳真: Enable Fax in Dial Plan-->Set - UMDialPlan - identity MyDialPlan - FaxEnabled:$true

            Enable user for Fax-->Set - UMMailbox - identity UMUser1 - FaxEnabled:$true

            If dial plan is fax enabled but the user is fax'disabled' the user settings take precedence

            If dial plan is fax enabled and user fax settings is 'not set' then dial plan settings take effect

Fax屬性的設定: Maximum calls - UM server settings-->Call duration - failure will generate incomplete message

                   Send 'fax id' - UM Policy

                   Send 'fax message text with message body' - UM Policy

本文轉自 葉俊生 51CTO部落格，原文連結:http://blog.51cto.com/yejunsheng/161355