USB modem support
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 data device.
The device is accessed through the
makes it behave like a
driver appeared in
was added in OpenBSD 2.7
Only modems with multiplexed commands and data are supported at the