Documentation/networking/ppp_generic.rst

154 queue of transmit packets for each attached channel.  Normally the
170 If multilink is not in use, this packet is then passed to the attached
256 /dev/ppp acts independently and can be attached either to a PPP unit
264 unattached.  Using an ioctl call, it can then be attached to an
265 existing unit, attached to a newly-created unit, or attached to an
266 existing channel.  An instance attached to a unit can be used to send
269 attached to a channel can be used to send and receive PPP frames on
274 write to the unit (i.e., to an instance of /dev/ppp attached to the
280 A channel is not initially attached to any unit.  In this state it can
286 on whether it is unattached, attached to a PPP interface, or attached
304 The ioctl calls available on an instance of /dev/ppp attached to a
335 The ioctl calls that are available on an instance that is attached to