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If Avaya set for Dual Forking, and Lync client is turned off, calls are immediately answered by ExUM voicemail. PBX phone only rings once. RRS feed

  • Question

  • The issue to be addressed involves the following scenario...

    1. PSTN calls arrive inbound on the Avaya IP-PBX, which is configured for Dual-Forking.

    2. So these inbound calls are sent to local PBX phone extensions, and also to Lync.

    3. Desired behavior is, both the PBX phone and Lync client should ring, and user answers on the preferred device.

    4. Lync users are also configured for ExUM voicemail, via Lync/Exchange UM Integration.

    [All works as expected when Lync users are signed in.]

    Problem occurs when...

    5. A Lync user is not signed in.

    6. When PSTN call is "dual-forked", the call arrives at Lync FE and sent immediately to ExUM for the called Lync user.

    7. Since the call connects so quickly to ExUM voicemail, Avaya sees this and terminates the call leg to the PBX phone (which only rings at most one time).

    Desired behavior would be...

    8. Increase the time before Lync FE (specifically the inbound/defaultrouting process) transfers the call to ExUM (exumrouting process) for the Lync user. [to 30 secs, or so]

    9. This would allow the PBX phone to ring several times, giving the PBX phone user time to answer if desired, before ExUM voicemail anwers the call.

    So I'm looking for guidance on if there is a setting on Lync FE (via Lync Mgmt Shell, or Registry) to control the time before Lync sends calls to ExUM for voicemail coverage.

    [it is understood that this setting, if available, would affect voicemail coverage for all Lync users. But this behavior is desirable to support the Avaya Dual-Forking feature, while users are being migrated to Lync. This is for a large Lync deployment, so the migration to Lync will take some time.]

    Thanks in advance,  Randy.

    Saturday, February 25, 2012 10:55 PM

Answers

  • Hmm, you could look at this another way. Does the Avaya have an ability to not consider the call answered if the call is answered too quickly? I know Cisco CUCM has this to avoid Lync/mobile voicemail taking the call rather than the desk phone ringing.

    I appreciate this may cause an issue if you do want Exchange UM to eventually take the call, but you can setup Exchange UM for both a IP PBX phone and Lync on a single mailbox.

    hope that helps

    Tom


    Tom Arbuthnot, Consultant Modality Systems
    Blog: Lync'd Up Blog Join over 300 UC Pros who subscribe for blog updates: Email or RSS
    Twitter @tomarbuthnot

    • Marked as answer by Sean_Xiao Monday, March 5, 2012 9:36 AM
    Monday, February 27, 2012 12:28 AM

All replies

  • Hmm, you could look at this another way. Does the Avaya have an ability to not consider the call answered if the call is answered too quickly? I know Cisco CUCM has this to avoid Lync/mobile voicemail taking the call rather than the desk phone ringing.

    I appreciate this may cause an issue if you do want Exchange UM to eventually take the call, but you can setup Exchange UM for both a IP PBX phone and Lync on a single mailbox.

    hope that helps

    Tom


    Tom Arbuthnot, Consultant Modality Systems
    Blog: Lync'd Up Blog Join over 300 UC Pros who subscribe for blog updates: Email or RSS
    Twitter @tomarbuthnot

    • Marked as answer by Sean_Xiao Monday, March 5, 2012 9:36 AM
    Monday, February 27, 2012 12:28 AM
  • Hi,

    Does the Avaya client has simultaneously ring option. If it has, you can disable Avaya Dual-Forking feature and configured simultaneously ring with Lync. You can setup Exchange UM for both a IP PBX phone and Lync on a single mailbox as Tom said. The calls forward to Exchange server only when no answered from the Avaya client.


    Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

    Monday, February 27, 2012 9:23 AM