# MC8795V Audio Glitches on Call Connect

**URL:** <https://forum.sierrawireless.com/t/mc8795v-audio-glitches-on-call-connect/8068>\
**Category:** MC/EM Series\
**Created:** [July 19, 2015, 11:15pm UTC](https://forum.sierrawireless.com/t/mc8795v-audio-glitches-on-call-connect/8068 "2015-07-19T23:15:54Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![nickatcuriola](https://avatars.discourse-cdn.com/v4/letter/n/da6949/32.png) [@nickatcuriola](https://forum.sierrawireless.com/u/nickatcuriola)\
**Post date:** [July 19, 2015, 11:15pm UTC](https://forum.sierrawireless.com/t/mc8795v-audio-glitches-on-call-connect/8068/1 "2015-07-19T23:15:54Z")

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Just joined a project using the MC8795V and we’re experiencing a loud audio distortion on calls connecting on Vodafone NZ. Is this a known issue and is there a suitable upgrade?

We’re using the AT interface and have products in the field so any FW upgrades would need to be done from a Linux console. Looking forward to a reply.

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**Author:** ![Rex\_alex](https://avatars.discourse-cdn.com/v4/letter/r/73ab20/32.png) [@Rex\_alex](https://forum.sierrawireless.com/u/Rex_alex)\
**Post date:** [July 22, 2015, 8:43am UTC](https://forum.sierrawireless.com/t/mc8795v-audio-glitches-on-call-connect/8068/2 "2015-07-22T08:43:59Z")

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Hi,  
the issue is observed only in vodafone network??

Thanks,  
Alex

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**Author:** ![nickatcuriola](https://avatars.discourse-cdn.com/v4/letter/n/da6949/32.png) [@nickatcuriola](https://forum.sierrawireless.com/u/nickatcuriola)\
**Post date:** [July 22, 2015, 11:48pm UTC](https://forum.sierrawireless.com/t/mc8795v-audio-glitches-on-call-connect/8068/3 "2015-07-22T23:48:56Z")

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It seems to manifest on most networks that have High Quality Audio enabled. We’re running some modems with v35 that the issue manifests on reliably, any FW after v46 seems to work fine without the glitching.

If this is purely a modem FW issue it would be great to know how to get CWE files loaded onto our units under Linux

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**Author:** ![Rex\_alex](https://avatars.discourse-cdn.com/v4/letter/r/73ab20/32.png) [@Rex\_alex](https://forum.sierrawireless.com/u/Rex_alex)\
**Post date:** [July 27, 2015, 10:09am UTC](https://forum.sierrawireless.com/t/mc8795v-audio-glitches-on-call-connect/8068/4 "2015-07-27T10:09:15Z")

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Hi,  
you can download the cwe files from source : [http://source.sierrawireless.com/resources/#tags=MC8795V%7CFirmwares+%26+drivers](http://source.sierrawireless.com/resources/#tags=MC8795V%7CFirmwares+%26+drivers)

you can make use of the Linux SDK to download FW (via Utilities\gsm\FirmwareDownload): [http://source.sierrawireless.com/resources/airprime/software/linux-cns-v2-sdk-software/](http://source.sierrawireless.com/resources/airprime/software/linux-cns-v2-sdk-software/)

Thanks,  
Alex