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  1. Migration V7 => V11: Call drops after 32 secs with ACK not received

    It´s a proprietary router from my provider, Bouygues Telecom in France, in use now (like my 3CX Server) for several years. https://www.bouyguestelecom.fr/offres-internet-bbox-pro BBox Pro, internal SIP for 2 lines (coming in on VoIP, no SIP data provided, can only be used with the Box) In...

  2. Migration V7 => V11: Call drops after 32 secs with ACK not received

    Thanks for the replies. Yes, the handsets are in the same subnet as the 3CX server. I would also have thought that this is 100% a firewall issue, the things whichs strikes me is that with XP and V7 it works flawless. With Windows 7 (pro, firewall enabled with 3CX ports open or firewall even...

  3. Migration V7 => V11: Call drops after 32 secs with ACK not received

    Thanks, I already read a lot about the ACK not received error. The weird thing is, that with 3CX V7 on WinXP Pro it works flawless, with 3CX V11 on W7 Pro ("naked", firewall, defender, virus scanner deactivated) it drops the connection. I don´t know why the ACK passes on the old system, but not...

  4. Migration V7 => V11: Call drops after 32 secs with ACK not received

    Hello, I´m aware that I´m migrating from an ancient version to a very old version :-) On my Windows XP Pro machine with 3CX V7 everything works fine. I did a backup, and imported it to a Windows 7 Pro machine with V11 installed. Inbound works fine, but I have the famous "ACK not received"...
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