# USB CDC-ECM Support on HL7812

**URL:** <https://forum.sierrawireless.com/t/usb-cdc-ecm-support-on-hl7812/32906>\
**Category:** HL78\
**Created:** [August 29, 2024, 11:21pm UTC](https://forum.sierrawireless.com/t/usb-cdc-ecm-support-on-hl7812/32906 "2024-08-29T23:21:44Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![vytautas.virvicius](https://avatars.discourse-cdn.com/v4/letter/v/c37758/32.png) [@vytautas.virvicius](https://forum.sierrawireless.com/u/vytautas.virvicius)\
**Post date:** [August 29, 2024, 11:21pm UTC](https://forum.sierrawireless.com/t/usb-cdc-ecm-support-on-hl7812/32906/1 "2024-08-29T23:21:44Z")

</div>

On the product page there is a reference to USB CDC-ECM ([https://www.sierrawireless.com/iot-modules/lpwa-modules/hl7812/](https://www.sierrawireless.com/iot-modules/lpwa-modules/hl7812/)), however I can’t find any documentation about it.

Is USB CDC-ECM supported on HL7812?

---

<div class="post-metadata">

**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\
**Post date:** [August 30, 2024, 4:20am UTC](https://forum.sierrawireless.com/t/usb-cdc-ecm-support-on-hl7812/32906/2 "2024-08-30T04:20:50Z")

</div>

this command shows ACM port is enumerated:

 ![image](https://us1.discourse-cdn.com/flex025/uploads/sierrawireless/original/2X/4/43be904dc1ab671b01004bf8905012301003def8.png)

---

<div class="post-metadata">

**Author:** ![vytautas.virvicius](https://avatars.discourse-cdn.com/v4/letter/v/c37758/32.png) [@vytautas.virvicius](https://forum.sierrawireless.com/u/vytautas.virvicius)\
**Post date:** [September 1, 2024, 2:07am UTC](https://forum.sierrawireless.com/t/usb-cdc-ecm-support-on-hl7812/32906/3 "2024-09-01T02:07:28Z")

</div>

So, is it correct to say only CDC-ACM is supported, not CDC-ECM?

---

<div class="post-metadata">

**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\
**Post date:** [September 3, 2024, 6:25am UTC](https://forum.sierrawireless.com/t/usb-cdc-ecm-support-on-hl7812/32906/4 "2024-09-03T06:25:21Z")

</div>

yes, you are correct!