U620L Novatel

AKA

VERIZON USB620L
MC620

INFO

QUALCOMM 3G/4G

Config Background

• http://www.verizonwireless.com/dam/support/pdf/user_guide/u620-linux-integration-guide-7-17-15.pdf

Available modes of the device are RNDIS and CDC-ECM.

RNDIS is a Microsoft proprietary protocol used mostly on top of USB. It provides a virtual Ethernet link to most versions of the Windows and Linux operating systems. A partial RNDIS specification is available from Microsoft, but Windows implementations have been observed to issue requests not included in that specification, and to have undocumented constraints.

CDC-ECM is Ethernet over USB.

Device Modes

End-User Mode: Enumerating CDC-ECM interface - In this mode, the device is used for a WWAN connection to the Internet for such activities as browsing or connecting to a VPN.

pacman -Sv usb_modeswitch
lsusb
sudo usb_modeswitch -v 0x1410 -p 0x9020 -u 2
ip link
sudo dhcpd in73rf4c3

Enterprise Mode: Enumerating CDC-ECM and Modem interfaces (Optional) - In this mode, the Modem interface allows users to send AT commands to the device to configure, query, or manage the Internet connection.

I do not understand Enterprise mode, they say CDC-ECM AND modem interfaces? Does it give both interfaces at once? The guide asks you to compile option.c and usb-wwan.h which are definitions for USB serial mobile broadband cards. It just involves adding a driver line that associates the device with the driver.