For some people
the features that can be included on a telephone will not solve
the problems they have in using a telephone. Plug connection of
the handset permits the use of alternatives such as a lightweight
headset, which may be very convenient for those who have to use
head pointing devices to compensate for absence of arm movement.
It also allows for extended cords to be fitted, so that the handset
can be mounted on a fixed stand.
should be designed to allow connection to a range of additional