# USB\_CDC\_EEM\_ACM\_AUDIO sample

**URL:** <https://forum.sierrawireless.com/t/usb-cdc-eem-acm-audio-sample/7116>\
**Category:** Open AT\
**Created:** [March 30, 2014, 1:16am UTC](https://forum.sierrawireless.com/t/usb-cdc-eem-acm-audio-sample/7116 "2014-03-30T01:16:49Z")\
**Posts on this page:** 7\
**Page:** 1

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**Author:** ![yongyew](https://avatars.discourse-cdn.com/v4/letter/y/258eb7/32.png) [@yongyew](https://forum.sierrawireless.com/u/yongyew)\
**Post date:** [March 30, 2014, 1:16am UTC](https://forum.sierrawireless.com/t/usb-cdc-eem-acm-audio-sample/7116/1 "2014-03-30T01:16:49Z")

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hi everyone,

I want to try this sample on CDC EEM ACM AUDIO on SL8082T to understand how it work on usb ethernet . I encounter one error when i try to do “AT+WMFM=0,1,3” as shown below.

• +CME ERROR: 3 if the USB stack failed to start.

Does it mean SL8082T do not support CDC stack mode yet? any solution or advice?

Thank you in advance  
yongyew

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**Author:** ![lotam](https://avatars.discourse-cdn.com/v4/letter/l/958977/32.png) [@lotam](https://forum.sierrawireless.com/u/lotam)\
**Post date:** [March 30, 2014, 12:10pm UTC](https://forum.sierrawireless.com/t/usb-cdc-eem-acm-audio-sample/7116/2 "2014-03-30T12:10:23Z")

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SL808xT actually based on CDC/ACM by default, the USB driver (for Windows Desktop OS) required comes with OASiS installation.

You don’t really need this sample code to run CDC.

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**Author:** ![sushil](https://avatars.discourse-cdn.com/v4/letter/s/e19adc/32.png) [@sushil](https://forum.sierrawireless.com/u/sushil)\
**Post date:** [March 31, 2014, 5:36am UTC](https://forum.sierrawireless.com/t/usb-cdc-eem-acm-audio-sample/7116/3 "2014-03-31T05:36:22Z")

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CDC/ACM - Indeed, enabled by default on SL808xT.

CDC/EEM (USB Ethernet) - Not supported on SL808xT.

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**Author:** ![yongyew](https://avatars.discourse-cdn.com/v4/letter/y/258eb7/32.png) [@yongyew](https://forum.sierrawireless.com/u/yongyew)\
**Post date:** [March 31, 2014, 10:04am UTC](https://forum.sierrawireless.com/t/usb-cdc-eem-acm-audio-sample/7116/4 "2014-03-31T10:04:42Z")

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Thank you lotam and sushil 🙂

> [@](#):
>
> CDC/EEM (USB Ethernet) - Not supported on SL808xT.

I am interest to understand more on USB CDC EEM. How about SL6087? can it support CDC EEM?

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**Author:** ![lotam](https://avatars.discourse-cdn.com/v4/letter/l/958977/32.png) [@lotam](https://forum.sierrawireless.com/u/lotam)\
**Post date:** [March 31, 2014, 2:12pm UTC](https://forum.sierrawireless.com/t/usb-cdc-eem-acm-audio-sample/7116/5 "2014-03-31T14:12:48Z")

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> [@yongyew](#):
>
> I am interest to understand more on USB CDC EEM. How about SL6087? can it support CDC EEM?

Yes, it is supported on 2G variants, e.g. SL6087 and Q2687.

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**Author:** ![yongyew](https://avatars.discourse-cdn.com/v4/letter/y/258eb7/32.png) [@yongyew](https://forum.sierrawireless.com/u/yongyew)\
**Post date:** [April 1, 2014, 11:28am UTC](https://forum.sierrawireless.com/t/usb-cdc-eem-acm-audio-sample/7116/6 "2014-04-01T11:28:11Z")

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Thank you lotam,

It work on SL6087 with this sample code. I have successful connect to internet using CDC EEM on ubuntu. 🙂

( But does not work on window 7-64bit after install swieemcomposite.inf driver )

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**Author:** ![sarang](https://avatars.discourse-cdn.com/v4/letter/s/bc79bd/32.png) [@sarang](https://forum.sierrawireless.com/u/sarang)\
**Post date:** [June 24, 2014, 12:40pm UTC](https://forum.sierrawireless.com/t/usb-cdc-eem-acm-audio-sample/7116/7 "2014-06-24T12:40:25Z")

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Hi,  
I am using sierra MC 8090 Modem.i want to capture audio(voice call) data over USB  
How to do the same? any idea