# HL7802 Setup ppp connecxion over AT\_PPP

**URL:** <https://forum.sierrawireless.com/t/hl7802-setup-ppp-connecxion-over-at-ppp/24377>\
**Category:** Legacy HL Series\
**Created:** [July 26, 2021, 9:51am UTC](https://forum.sierrawireless.com/t/hl7802-setup-ppp-connecxion-over-at-ppp/24377 "2021-07-26T09:51:10Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![georges.torval91](https://avatars.discourse-cdn.com/v4/letter/g/e19b73/32.png) [@georges.torval91](https://forum.sierrawireless.com/u/georges.torval91)\
**Post date:** [July 26, 2021, 9:51am UTC](https://forum.sierrawireless.com/t/hl7802-setup-ppp-connecxion-over-at-ppp/24377/1 "2021-07-26T09:51:10Z")

</div>

I see in the HL78 PTS that there is a AT\_PPP port over USB, i guess is dedicated to ppp, can you give some guidelines to use this port and ppp? (HL78-Linux/Windows host)

---

<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:** [July 26, 2021, 10:02am UTC](https://forum.sierrawireless.com/t/hl7802-setup-ppp-connecxion-over-at-ppp/24377/2 "2021-07-26T10:02:18Z")

</div>

you can see these two topics on +KUSBCOMP command:

> [@HL7800 USB support](https://forum.sierrawireless.com/t/hl7800-usb-support/16570/6):
>
> Normally new FW is updatable but before that please provide your result ATI9, AT+KGSN=2(IMEI), AT+KGSN=3(FSN). Yes. Youu can set USB ONLY without UART1 at all by (AT+KUSBCOMP=1. (debug port UART0 is not impacted) Here’s the syntax:[AirPrime - HL78xx - AT Commands Interface Guide - Rev8.1.pdf (1.9 MB)](https://forum.sierrawireless.com/uploads/short-url/oIULRFsubgnvGLA7Akc1KecO9Qc.pdf) AT+KUSBCOMP= USB mode config 0 USB disabled (default) 1 3 CDC-ACM mode (PID: 0xC001) USB-ACM0 - AT/PPP port USB-ACM1 - PPP data port USB-ACM2 - NMEA data port Notes The configuration is …

> [@HL7800 as a network interface in Linux](https://forum.sierrawireless.com/t/hl7800-as-a-network-interface-in-linux/20224/2):
>
> Hi @gustav.sohtell, I assume that HL7800 is already in USB mode. You can confirm this with AT+KUSBCOMP? command. If it returns “1”, that means device is in USB mode. Once in USB mode, you will see three ttyACMx ports. Typically, ttyACM0, ttyACM1 and ttyACM2. USB-ACM0 — AT port USB-ACM1 — AT/PPP data port USB-ACM2 — NMEA data port I will recommend to you ACM1 as your PPP port. You will also need PPP daemon installed on your host. Check that pppd is available with pppd version Check th…