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The NAT and SIP Problem - Here's How to Fix it. - N2Net
https://n2net.com/the-nat-and-sip-problem-heres-how-to-fix-it/#:~:text=The%20provider%E2%80%99s%20VoIP%20equipment%20cannot%20route%20the%20private,Issue%20IP%20phone%20systems%20today%20are%20pretty%20smart.
SIP with NAT or Firewalls - Asterisk Guru
http://asteriskguru.com/tutorials/sip_nat_oneway_or_no_audio_asterisk.html
SIP with NAT or Firewalls. 1.1. Problem Description: Most conventional voip protocols (SIP, h323, …) are not programmed with NAT in mind, on itself they only carry call signaling (call setup, teardown,… and use RTP to carry the audio samples. The signaling usually uses fixed and standardized ports, but the RTP uses random ports to exchange ...
Sip passing through nat but rtp is not - no audio - Cisco ...
https://community.cisco.com/t5/switching/sip-passing-through-nat-but-rtp-is-not-no-audio/td-p/1447020
Sip passing through nat but rtp is not I'm looking at traffic leaving my router with a sniffer. I see SIP traffic but I do not see RTP traffic. The phones ring on both sides but I do not get any audio. interface f0/0.100 ip address 192.168.10.1 255.255.255.0 ip nat …
SIP - No audio or one way audio :: Zoiper
https://www.zoiper.com/en/support/answer/for/android/11/SIP_-_No_audio_or_one_way_audio
SIP - No audio or one way audio ( on Android) « Back. When using SIP protocol one way or missing auido issues mostly appear due to configuration problems. The issues usually appear if the configuration is not adjusted accordingly to the wireless or 3g/4g network. In most cases this can be resolved by altering the account configuration. ...
The causes of No-Audio and One-Way-Audio VoIP Calls ...
https://blog.kolmisoft.com/the-causes-of-no-audio-and-one-way-audio-voip-calls/
Devices under NAT could be unable to bypass NAT properly. A device could be unaware of the NAT’s existence and send its local IP to the Internet. NAT is a common cause of one-way and no-way audio on VoIP calls. Best practices have been written up in an RFC to define NAT traversal for SIP-based voice communications.
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