![]() If there are no incoming packets, it means Zoiper does not receive any incoming audio and has nothing to play. On Linux you can confirm the issue by clicking on the network statistics during an active call. Without going into details (you can read more here if you want), it causes the ports used by voip programs to change in a mostly unpredictable way and can often result in one way or no audio, failed incoming calls, automatic hangup after 30s and more. To make this possible, they use a method called portmapping. The main culprit is the way NAT networks (like your typical home or office router) distribute one internet connection to multiple pc's and phones. This is the reason why you might have proper working audio on some networks but not on others. There are some settings in Zoiper to inform the server where to send the packets, the required configuration depends on the combination of the SIP server used (or provider used) as well as the WiFi router or 3g/4g network. In some cases the packets from the Softphone also do not reach the other side, causing the other side not to hear anything. This is a very common problem with the SIP protocol (IAX is rarely affected) where the incoming packets do not reach Zoiper, causing no incoming audio. misconfigured portforwarding on the router An issue with the headset, audio card or audio driver. NAT related network issues (>95% of the missing audio cases) This tutorial is not applicable for poor quality audio Missing or one way audio is one of the most common issues with VOIP, fortunately in most cases it is relatively easy to solve. Important: If you have installed Windows 10, update 1803 and your Microphone or Webcam are not working, see here. Eventually everything should work just fine. If you still have one-way or missing audio issues, try to also enable the "TLS" under "Push transport". It has 7 days free trial period, during which you can decide whether you like it or not.Īfter enabling the PUSH service, enable from "Push Protocols" the "SIP + RTP" option, then try to make a call. This will make the traffic "invisible" for such services and may prevent some issues.īefore continuing with the troubleshooting steps below, try using the Push Proxy service. Many NAT related issues are caused by "SIP ALG" running on the routers, this option allows you to select "TLS" for the transport of the communication between you(the client) and our proxy server. "Push Transport" - This is transport type for the proxy service. Note: The Push service works only with SIP.Ģ. "Proxy Protocols" - Here, you can select whether you want to use the proxy service only for the signalling or for both the signalling and the audio (SIP + RTP). ZoiPer Pro v2.20.Below the "Use Push notifications" option, you will find two additional settings:ġ. To make and receive VoIP calls, you must subscribe to any SIP or IAX-based service provider worldwide. Please note that Zoiper is a client-side software VOIP phone application that is independent of a VoIP service. Automatic Provisioning System for Easy Customer Deliveryįurthermore If you want to give Zoiper to your customers, use the free automatic provisioning system at to avoid cumbersome manual configurations. It offers Bluetooth support (beta), lowest latency of all Android softphones, best audio quality (even on older devices), supports calling over 3G and WIFI, multiprotocol with SIP and IAX support, integration with the native Android contact list, speakerphone mute and hold, UDP and TCP transports (use TCP for better battery life!), supports the g711 (ulaw, alaw), speex, iLBC, and gsm codecs, supports sending DTMF, supports DNS SRV, built-in echo cancellation, STUN support, change ringtone per account, call waiting, video support, ZRTP/TLS support, call transfer, and wideband audio. Zoiper comes with impressive features that set it apart from other softphone applications. Moreover With Zoiper, you can make and receive VoIP calls over 3G or WiFi without any commercials. It is perfect for end-users, service providers, call centers, or any business that wants to benefit from VoIP communications. ![]() Zoiper is a top-quality IAX and Taste softphone application that delivers exceptional audio quality and an intuitive user interface. The Ideal Softphone Application for a Seamless VoIP Experience ![]() Automatic Provisioning System for Easy Customer Delivery.The Ideal Softphone Application for a Seamless VoIP Experience.
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