umodem* at uhub?
ucom* at umodem?
driver provides support for USB modems
in the Communication Device Class using the Abstract Control Model. These
modems are basically standard serial line modems, but they are accessed via
USB instead. They support a regular AT command set. The commands can either be
multiplexed with the data stream or handled through separate pipes. In the
latter case the AT commands have to be given on a device separate from the
The device is accessed through the
driver which makes it
behave like a tty(4)
driver appeared in
was added in OpenBSD 2.7
Only modems with multiplexed commands and data are supported at the