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3g/UMTS USB Dongle


Gargoyle 1.5.1 and above now supports 3g/UMTS USB Dongles for WAN access to the internet from your wireless ISP provider.

Supported Modems

  • Huawei E3372 4G LTE USB Modem


To be able to use a 3g with Gargoyle

  • Your Gargoyle router must have a free USB port.
  • You need 3g/UMTS USB Dongle
  • An active account with you 3g provider
  • Routers with at least 8MB of Flash and 32MB of RAM.


In your router configuration select

Select 3g

–» Connection –» Basic –» Internet/WAN –» Connect via:

Select 3g (GSM) from the pull down box

If 3g (GSM) is not displayed you will need to plug in your 3g/UMTS USB Dongle wait a couple of minutes then refresh your browser.

Enter 3g provider details

You can either manually enter your provider details or select your provider from the drop down “Mobile ISP:” box


service depends on the services (eg Orange in Poland allows you to connect GSM/UMTS (HSPA) and CDMA).


Select USB port

  • /dev/ttyUSB0
  • /dev/ttyUSB1
  • /dev/ttyUSB2
  • /dev/ttyUSB3

If you don't have SSH access to your router you will have to guess which port your modem manufacture uses

ZTE /dev/ttyUSB2
Pantech UMW190/dev/ttyACM0
Pantech UML290/dev/cdc-wdm0


PIN is on the sim card. This may or may not be used.

Mobile ISP

Manual or select your provider


Access Point Name (APN) is a computer protocol that typically allows a user's computer to access the Internet using the mobile phone network.

New Zealand APN
Verizonmw01.vzwstatic (Static IP in Midwest)

User Name

optional, provider dependant


optional, provider dependant

WAN Ethernet Port

When using 3g select which option for your spare WAN Ethernet port

Trouble Shooting

From command line install picocom

<shell> opkg update opkg install picocom </shell>

Connect to your 3g dongle

<shell> picocom -b 115200 /dev/ttyUSB0 </shell>

Change to your 3g port (USBx). If you get he wrong port you will get this error at he end when you type anything.

<shell> Terminal ready

FATAL: write to term failed: Resource temporarily unavailable root@Gargoyle:~$ </shell>

or when nothing is plugged in (3g dongle) <shell> FATAL: cannot open /dev/ttyUSB2: No such file or directory


success will look something like this

<shell> +ZDONR: “Telecom NZ”,530,5,“CS_ONLY”,“ROAM_OFF”


+ZDONR: “Telecom NZ”,530,5,“CS_PS”,“ROAM_OFF”

+ZPASR: “UMTS” </shell>

ZTE modems

ZTE USB modems by default support self-installation and auto-run functionality. This is a problem with linux devices and needs to be disabled.

To disable run

<shell> picocom -b 115200 /dev/ttyUSB2 AT+ZOPRT=5 AT+ZCDRUN=8 </shell>

3g.txt · Last modified: 2018/02/11 00:17 by ispyisail