3CX + Patton 4552 == massive noise

Discussion in '3CX Phone System - General' started by zigaj, Jul 15, 2010.

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  1. zigaj

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    Hi, Everyone!

    I've installed Patton 4552 on my ISDN BRI line, wiht 3CX 9 (last build) as the PBX.
    The Patton was configured via 3CX, and is presently set to use 711a pass-through. (no difference with 711u)
    The analogue fax machine (Samsung MFC) is on a SPA-2102, configured for fax as per 3CX instructions for SPA 3102.

    I can fax between 2 fax machines on different SPAs in the house. I can (in part; some problems with our telco) receive and send faxes over my VOIP lines - however this is transmitted as pass-thru.

    The Patton setup works in part; as soon as the fax tone detection kicks in, the "hissing" noise becomes overwhelming and drains everything else out.

    Any hints?

    Regards,

    Ziga
     
  2. mfm

    mfm Active Member

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    Hi,

    Is this when your on a call on another line or when does it happen?
     
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  3. zigaj

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    Hi!

    Figured it out on my own - when I moved the Patton to bypass the fax via a-law, it worked.
    Apparently, t38 doesn't quite work between Patton 4552 and SPA 2102.

    Regards,

    Ziga
     
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