topic USB modem and voice support in i.MX Processors https://community.nxp.com/t5/i-MX-Processors/USB-modem-and-voice-support/m-p/631287#M95967 <HTML><HEAD></HEAD><BODY><P>We are using Huawei K3520 USB dongle for phone call in Linux environment. Phone call connection is established with AT commands and voice stream starts to flow from /dev/ttyUSB1.<BR />Problem is that voice stream produces only random noise from speaker although we have tried many different codecs in aplay and Audacity. <BR />Which codecs are commonly used for voice streams in modems and how them are activated with AT commands?</P></BODY></HTML> Thu, 13 Oct 2016 07:23:31 GMT arisav 2016-10-13T07:23:31Z USB modem and voice support https://community.nxp.com/t5/i-MX-Processors/USB-modem-and-voice-support/m-p/631287#M95967 <HTML><HEAD></HEAD><BODY><P>We are using Huawei K3520 USB dongle for phone call in Linux environment. Phone call connection is established with AT commands and voice stream starts to flow from /dev/ttyUSB1.<BR />Problem is that voice stream produces only random noise from speaker although we have tried many different codecs in aplay and Audacity. <BR />Which codecs are commonly used for voice streams in modems and how them are activated with AT commands?</P></BODY></HTML> Thu, 13 Oct 2016 07:23:31 GMT https://community.nxp.com/t5/i-MX-Processors/USB-modem-and-voice-support/m-p/631287#M95967 arisav 2016-10-13T07:23:31Z Re: USB modem and voice support https://community.nxp.com/t5/i-MX-Processors/USB-modem-and-voice-support/m-p/631288#M95968 <HTML><HEAD></HEAD><BODY><P>Hi Ari</P><P></P><P>please check</P><P><A class="link-titled" href="https://boundarydevices.com/cellular-modems-on-i-mx6-boards/" title="https://boundarydevices.com/cellular-modems-on-i-mx6-boards/">https://boundarydevices.com/cellular-modems-on-i-mx6-boards/</A>&nbsp;</P><P>regarding codecs one can look at attached Linux Manual</P><P>Chapter 28 Advanced Linux Sound Architecture (ALSA) System</P><P>voice through usb modem is described in common resources</P><P><A class="link-titled" href="http://stackoverflow.com/questions/7107572/voice-call-through-gsm-modem" title="http://stackoverflow.com/questions/7107572/voice-call-through-gsm-modem">Voice call through GSM modem - Stack Overflow</A>&nbsp;</P><P></P><P>Best regards<BR />igor<BR />-----------------------------------------------------------------------------------------------------------------------<BR />Note: If this post answers your question, please click the Correct Answer button. Thank you!<BR />-----------------------------------------------------------------------------------------------------------------------</P></BODY></HTML> Thu, 13 Oct 2016 23:30:45 GMT https://community.nxp.com/t5/i-MX-Processors/USB-modem-and-voice-support/m-p/631288#M95968 igorpadykov 2016-10-13T23:30:45Z