Mino – The UC Guy

Microsoft Unified Communications Blog

How to enable inbound fax for OCS 2007 Enterprise Voice and Exchange 2007 UM enabled users?

Posted by Mino on March 9, 2009

Any Post starting with this disclaimer means that this post was not written by me however I have liked it and added to my blog. I will also include the link to the original or Similar post to provide credit to the original author.

http://blogs.technet.com/jenstr/archive/2007/11/13/how-to-enable-inbound-fax-for-enterprise-voice-and-exchange-2007-um-enabled-ocs-2007-users.aspx

Exchange 2007 SP1 UM supports both voice mail and incoming fax to a given extension. However, if the user is both UM-enabled and enabled for Enterprise Voice using OCS 2007, incoming fax is not supported using the same extension. The reason being that OCS 2007 Mediation Server does not currently support T.38.

How is it possible to provide incoming fax support for Enterprise Voice enabled users? The answer is to use a separate extension for fax and route fax calls to this extension directly to Exchange 2007 SP1 UM outside of OCS 2007.

Let’s assume we have a company called Contoso with the environment shown below and we will use that company to explain the issue and the solution

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The OCS 2007 environment is connected to the PBX via a SIP/PSTN gateway called PSTNOCSGWY. The PBX routes all calls to the DID range +131255xxxxx to OCS 2007. OCS 2007 is integrated with the Exchange 2007 SP1 UM server called UMSRV1. It hosts a UM Dial Plan called OcsUmDialPlan of UriType = SipName (required for OCS 2007 integration). There is a UM Mailbox Policy associated with this UM dial plan called OcsUm. Exchange 2007 SP1 UM is connected to the PBX via OCS 2007.2

The Contoso user Test User is enabled for Enterprise Voice with the DID +13125510001 and SIP URI TestUser@contoso.com. His extension is 10001. His Enterprise Voice configuration is shown below.

 

 

To be enabled for Exchange 2007 SP1 UM the administrator would issue the following Exchange Management Shell command:

Enable-UmMailbox -id TestUser -UmMailboxPolicy OcsUmPolicy -Extensions 10001 -SIPResourceIdentifier TestUser@contoso.com -Pin 1234

Test User is now enabled for Exchange 2007 SP UM, but will not be able to receive incoming fax on extension 10001 or DID +13125510001.

As indicated above the solution is to give Test User a separate extension for fax and the extension needs to be routed to Exchange 2007 SP1 UM directly without going through OCS 2007. Contoso will therefore have to create a configuration as shown below. There is a dedicated SIP/PSTN gateway for connectivity to Exchange 2007 SP1 UM. The PBX routes the DID range +131266xxxxx to this SIP/PSTN gateway. There is a new UM Dial Plan called UmDialPlan with UriType=TelExtn. There is a UM Mailbox Policy associated with this UM dial plan called Um. The UM server UMSRV1 hosts both UM Dial Plans.

The administrator now decides that Test User should have the extra extension 11001 and DID +13126611001 as the fax number.

To enable Test User to receive fax the administrator need to issue the following Exchange Management Shell command:

Set-Mailbox -id TestUser -SecondaryAddress 11001 -SecondaryDialPlan UmDialPlan

With the above configuration Test User is now able to receive fax on DID +13126611001.

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13 Responses to “How to enable inbound fax for OCS 2007 Enterprise Voice and Exchange 2007 UM enabled users?”

  1. Victoria said

    Interesting post and thanks for sharing the information ….

    I researched a bit more after this and found internet fax is the best service to send fax messages any where..

    I found many sites providing online fax services but few of them like 800PBX are offering a free fax service which really helps for daily fax communications.

    Their free fax service helps me to send fax messages at free of cost through online.

  2. […] How to enable inbound fax for OCS 2007 Enterprise Voice and Exchange 2007 UM enabled users? […]

  3. jwdberlin said

    Our gateways support similar scenarios in two ways:

    1. If separate fax extension can be used (e.g. phone=123, fax=223 or phone=123, fax=9123) we can route fax numbers directly to exchange pilot id and manipulate fax extension to signal the same EUM address as for voice

    2. If there is no chance to have separate fax extensions we route to OCS, after pickup (in 0..3 seconds) we detect fax cng tone, take the call back from OCS and send it to Exchange UM, simulating a diverted call to reach the user’s mailbox directly – again without secondary EUM address

  4. Mino said

    can you please explain more and specially what your Media gateway does ?
    i have tested so far Quintum , Audio codes and Dialogic.
    anything new that yours does more ?

  5. Donald Ambrose said

    We are currently facing this issue that we cant get a call recieved by the auto attendant transfer to the operator.I have a valid ext number on the operator which i call directly but when i do a transfer thorugh 0 i get “cannot tranfer call ” and in the loggin below is the error i get.CAn you please help

    TL_INFO(TF_PROTOCOL) [3]031C.1F04::04/19/2010-13:39:49.153.000004cd (SIPStack,SIPAdminLog::TraceProtocolRecord:1224.idx(122))$$begin_record
    Instance-Id: 00005F9B
    Direction: outgoing;source=”local”
    Peer: E-BIZ-MAIL-2.e-bizsoft.com:3188
    Message-Type: response
    Start-Line: SIP/2.0 400 The specified phone profile was not found.
    From: ;epid=02718EB14A;tag=89962628ae
    To: ;tag=B21B29342C2A34DFE3727AB4240C9741
    CSeq: 627 INVITE
    Call-ID: b3ff9992-b386-451d-b3ba-4e02bf69cddf
    Content-Length: 0
    Via: SIP/2.0/TLS 192.168.1.26:3188;branch=z9hG4bK5ac11a5b;ms-received-port=3188;ms-received-cid=1D800
    ms-diagnostics: 14005;reason=”Could not find profile in internal lookup”;source=”e-biz-ocs-1.e-bizsoft.com”;ProfileName=”PSTN_LOC_OUT.e-bizsoft.com”;appName=”TranslationService”
    Server: TranslationService/3.0.0.0
    Message-Body: –
    $$end_record

  6. Joe P said

    I have very closely the same integration requirements except for using Exchange 2010 which will be coupled to OCS and Cisco CUCM version 7. My question is can I assoicate the same voicemail box user to both the OCS side and CUCM side at the same time so dialing in from one or another is attached to the same voice mail box?

  7. Andreas Georgsson said

    If you use Exchange 2010 Sp1 and Lync 2010, could you configure Lync 2010 route the fax to the UM server?

  8. Rory Donnelly said

    Andreas,

    Unfortunately it is not possible, although you could keep an Exchange 2007 box purely for fax mailboxes. Inbound faxing is not possible directly to Exchange 2010 although you can use some of the online fax providers to route inbound fax to 2010 mailboxes.

    Rory.

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