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To fix this can be rather complex, however, basically what you need to do is setup QoS (Quality of Service) on your network. <br />
<br />
Zoiper should be setup to mark it's traffic with the proper DSCP QoS code. Then your router needs to be QoS aware and setup to honor DSCP markings and give the voice traffic the highest priority. <br />
<br />
As I said, QoS can be very complex, so you may wish to hire someone to set this up for you. <br />
<br />
Another option is that your internet service may be not as solid as it should be. If you are losing packets on the way out to the internet, then it could either be your router or your internet provider that needs to be replaced.
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To fix this can be rather complex, however, basically what you need to do is setup QoS (Quality of Service) on your network.

Zoiper should be setup to mark it's traffic with the proper DSCP QoS code. Then your router needs to be QoS aware and setup to honor DSCP markings and give the voice traffic the highest priority.

As I said, QoS can be very complex, so you may wish to hire someone to set this up for you.

Another option is that your internet service may be not as solid as it should be. If you are losing packets on the way out to the internet, then it could either be your router or your internet provider that needs to be replaced.

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Usuall drill is to install or remove pulseaudio or to reconfigure it wirh realtime priority.<br />
Also sound driver parameters need a complete run-through.
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Usuall drill is to install or remove pulseaudio or to reconfigure it wirh realtime priority.
Also sound driver parameters need a complete run-through.

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Pay attention to pulseaudio. If it installs it will crackle again.
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Pay attention to pulseaudio. If it installs it will crackle again.

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i did some research &amp;&nbsp;troubleshooting &nbsp;myself &nbsp;&amp; i resolved the issue.
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i did some research & troubleshooting  myself  & i resolved the issue.

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hi i have installed ubuntu 14.04 32 bit, i am using zoiper to make voip calls, my voice is crackling &amp;&nbsp;glitchy, which package or driver i have to install to resolve this.
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hi i have installed ubuntu 14.04 32 bit, i am using zoiper to make voip calls, my voice is crackling & glitchy, which package or driver i have to install to resolve this.

Voice in crackling &amp; glitch in ubuntu 14.04

Linux is a UNIX-like open source operating system with hundreds of distinct distributions, including: Fedora, openSUSE, Ubuntu, Debian, Slackware, Gentoo, CentOS, and Arch Linux. Linux is generally associated with web and database servers, but has become popular in many niche industries and applications.

Linux

The variety of Linux distributions creates myriad issues relating to configuration and operations when computers are networked, not the least of which is the use of various network management applications, some of which are included with specific distributions, while others are standalone applications.

Linux Networking

Voice over IP (VoIP) is a methodology and group of technologies for the delivery of voice communications and multimedia sessions over Internet Protocol (IP) networks, such as the Internet. Other terms commonly associated with VoIP are IP telephony, Internet telephony, broadband telephony, and broadband phone service. The term specifically refers to the provisioning of communications services (voice, fax, SMS, voice-messaging) over the public Internet, rather than via the public switched telephone network (PSTN).  Examples of the VoIP protocols are H.323, Media Gateway Control Protocol (MGCP), Session Initiation Protocol (SIP), H.248 (also known as Media Gateway Control (Megaco)), Real-time Transport Protocol (RTP), Real-time Transport Control Protocol (RTCP), Secure Real-time Transport Protocol (SRTP), Session Description Protocol (SDP), and Inter-Asterisk eXchange (IAX).

Voice in crackling &amp; glitch in ubuntu 14.04

Voice in crackling & glitch in ubuntu 14.04