Hello everyone,   We are having some issues with VOIP  Cisco Spa 303 phones inbound calls. Outbound calls work without any issues. The appliance that we are using is a MX100.  The phones are hosted by a VOIP service provider and we don't have PBX server.   We have been in touch with our VOIP service provider and they said we might have SIP ALG enabled and that's why we have issues. Then we talked with your ISP and they said SIP ALG is disabled. I know that Meraki MX doesn't use SIP ALG and if you want to use VOIP with Meraki you will need to check the traffic shaping rule. We went trough the documentation https://documentation.meraki.com/zGeneral_Administration/Tools_and_Troubleshooting/VoIP_on_Cisco_Meraki%3A_F.A.Q._and_Troubleshooting_Tips   The phones worked perfectly for a few years before this issue and nothing has changed on the traffic shapping rule side or on our internal network. Making a packet capture of a phone that doesn't work when somebody calls inbound points that the Meraki MX 100 sends the message 404 not found. We already have a VLAN VOIP for the phones and added the traffic shaping rules.Port forwarding is not a solution as we have multiple phones. I would like some other suggestions or ways on how to fix the issue as we are stuck right now and it seems the issue is within our network.   Many thanks,   Cheers, Vali ... View more