@Dmytro-Stolbovyi
voxl2:~$ usb-devices |less [1/1]

T: Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=480 MxCh= 1
Ver= 2.00 Cls=09(hub ) Sub=00 Prot=01 MxPS=64 #Cfgs= 1
P: Vendor=1d6b ProdID=0002 Rev=04.19
S: Manufacturer=Linux 4.19.125 xhci-hcd
S: Product=xHCI Host Controller
S: SerialNumber=xhci-hcd.0.auto
#Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=0mA
I: If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub

T: Bus=01 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 2 Spd=480 MxCh= 5
Ver= 2.10 Cls=09(hub ) Sub=00 Prot=02 MxPS=64 #Cfgs= 1
P: Vendor=0424 ProdID=2744 Rev=02.21
S: Manufacturer=Microchip Tech
S: Product=USB2744
#Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=0mA
I: If#= 0 Alt= 1 #EPs= 1 Cls=09(hub ) Sub=00 Prot=02 Driver=hub

T: Bus=01 Lev=02 Prnt=02 Port=03 Cnt=01 Dev#= 3 Spd=480 MxCh= 0
Ver= 2.10 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1
P: Vendor=0bda ProdID=0811 Rev=02.00
S: Manufacturer=Realtek
S: Product=802.11ac WLAN Adapter
S: SerialNumber=00e04c000001
#Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=500mA
I: If#= 0 Alt= 0 #EPs= 6 Cls=ff(vend.) Sub=ff Prot=ff Driver=rtl88XXau

T: Bus=01 Lev=02 Prnt=02 Port=04 Cnt=02 Dev#= 4 Spd=480 MxCh= 0
Ver= 2.01 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1
P: Vendor=0424 ProdID=2740 Rev=02.00
S: Manufacturer=Microchip Tech
S: Product=Hub Controller
#Ifs= 1 Cfg#= 1 Atr=c0 MxPwr=0mA
I: If#= 0 Alt= 0 #EPs= 0 Cls=ff(vend.) Sub=ff Prot=ff Driver=(none)

T: Bus=02 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=10000 MxCh= 1
Ver= 3.10 Cls=09(hub ) Sub=00 Prot=03 MxPS= 9 #Cfgs= 1
P: Vendor=1d6b ProdID=0003 Rev=04.19
S: Manufacturer=Linux 4.19.125 xhci-hcd
S: Product=xHCI Host Controller
S: SerialNumber=xhci-hcd.0.auto
#Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=0mA
I: If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub

T: Bus=02 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 2 Spd=5000 MxCh= 4
Ver= 3.20 Cls=09(hub ) Sub=00 Prot=03 MxPS= 9 #Cfgs= 1
P: Vendor=0424 ProdID=5744 Rev=02.21
S: Manufacturer=Microchip Tech
S: Product=USB5744
#Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=0mA
I: If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub

T: Bus=02 Lev=02 Prnt=02 Port=00 Cnt=01 Dev#= 3 Spd=5000 MxCh= 0
Ver= 3.20 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 9 #Cfgs= 1
P: Vendor=2c7c ProdID=0801 Rev=05.04
S: Manufacturer=Quectel
S: Product=RM530N-GL
S: SerialNumber=4543cb18
#Ifs= 5 Cfg#= 1 Atr=a0 MxPwr=896mA
I: If#= 0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=30 Driver=(none)
I: If#= 1 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=40 Driver=(none)
I: If#= 2 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=(none)
I: If#= 3 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=(none)
I: If#= 4 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=(none)

@Dmytro-Stolbovyi
voxl2:~$ lsusb
Bus 002 Device 003: ID 2c7c:0801
Bus 002 Device 002: ID 0424:5744 Standard Microsystems Corp.
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 004: ID 0424:2740 Standard Microsystems Corp.
Bus 001 Device 003: ID 0bda:0811 Realtek Semiconductor Corp.
Bus 001 Device 002: ID 0424:2744 Standard Microsystems Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

voxl2:~$ lsusb -t
/: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci-hcd/1p, 10000M
|__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/4p, 5000M
|__ Port 1: Dev 3, If 0, Class=Vendor Specific Class, Driver=, 5000M
|__ Port 1: Dev 3, If 1, Class=Vendor Specific Class, Driver=, 5000M
|__ Port 1: Dev 3, If 2, Class=Vendor Specific Class, Driver=, 5000M
|__ Port 1: Dev 3, If 3, Class=Vendor Specific Class, Driver=, 5000M
|__ Port 1: Dev 3, If 4, Class=Vendor Specific Class, Driver=, 5000M
/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci-hcd/1p, 480M
|__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/5p, 480M
|__ Port 4: Dev 3, If 0, Class=Vendor Specific Class, Driver=rtl88XXau, 480M
|__ Port 5: Dev 4, If 0, Class=Vendor Specific Class, Driver=, 480M

@Dmytro-Stolbovyi Hello support team,
Please figure out what I did wrong because modem couldn't start properly

voxl2:~$ systemctl status voxl-modem
● voxl-modem.service - Modem Initialization
Loaded: loaded (/etc/systemd/system/voxl-modem.service; enabled; vendor preset: enabled)
Active: active (running) since Fri 2025-10-17 11:03:11 UTC; 26s ago
Process: 29386 ExecStartPre=/bin/sleep 2 (code=exited, status=0/SUCCESS)
Main PID: 29387 (voxl-modem-star)
Tasks: 1 (limit: 4915)
CGroup: /system.slice/voxl-modem.service
└─29387 /bin/bash /usr/bin/voxl-modem-start.sh

Oct 17 11:03:14 m0054 voxl-modem-start.sh[29387]: [10-17_11:03:14:009] network interface '' or qmidev '' is not exist
Oct 17 11:03:14 m0054 voxl-modem-start.sh[29387]: [10-17_11:03:14:009] qmidevice_detect failed
Oct 17 11:03:14 m0054 voxl-modem-start.sh[29387]: [10-17_11:03:14:011] Quectel_QConnectManager_Linux_V1.5.9
Oct 17 11:03:14 m0054 voxl-modem-start.sh[29387]: [10-17_11:03:14:012] Find /sys/bus/usb/devices/2-1.1 idVendor=0x2c7c idProduct=0x801, bus=0x002, dev=0x003
Oct 17 11:03:14 m0054 voxl-modem-start.sh[29387]: [10-17_11:03:14:013] network interface '' or qmidev '' is not exist
Oct 17 11:03:14 m0054 voxl-modem-start.sh[29387]: [10-17_11:03:14:013] qmidevice_detect failed
Oct 17 11:03:14 m0054 voxl-modem-start.sh[29387]: [10-17_11:03:14:015] Quectel_QConnectManager_Linux_V1.5.9
Oct 17 11:03:14 m0054 voxl-modem-start.sh[29387]: [10-17_11:03:14:016] Find /sys/bus/usb/devices/2-1.1 idVendor=0x2c7c idProduct=0x801, bus=0x002, dev=0x003
Oct 17 11:03:14 m0054 voxl-modem-start.sh[29387]: [10-17_11:03:14:017] network interface '' or qmidev '' is not exist
Oct 17 11:03:14 m0054 voxl-modem-start.sh[29387]: [10-17_11:03:14:017] qmidevice_detect failed

@tom Hello. Could you please update this link as it doesn't work. I met with the same situation and need you assistance to recover voxl2