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  1. 3CX 11SP3, remote extension : no audio

    Hi, We install on yesterday a new customer, as this : Phones : 5x Cisco SPA 525G2, Firmware 7.5.3 • LOUVIERS : principal site. IPBX 3CX 11 SP3 / abyss on Windows Server 2012 DC. @IPPUBLIC 109.14.46.63 @IPPRIVATE 192.168.1.2 NAT : in DMZ mode to the IPBX (else, all traffic is diriged to...