No audio at Fanvil PA2S Paging Gateway
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 The PBX Is Vital PBX. 
 I have two Fanvil PA2S paging gateways configured as SIP extensions. (They do not do PJSIP).When I call the gateway extension, the gateway answers, plays the "beep-beep" but does not play the audio being spoken. No audio means NAT issue right? Am I missing something simple? or should I look at firewall rules to handle nat differently for these two devices? 
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 @JasGot said in No audio at Fanvil PA2S Paging Gateway: No audio means NAT issue right? Enabling SIP Transformations worked. But it broke PJSIP. Looks like I will be creating firewall rules to turn on SIP translation for these two devices only  
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 @JasGot why doesn't PJSIP work on them? They should really register just fine using PJSIP. SIP is not supposed to be really anymore on asterisk based systems, its deprecated. 
