Seltatel NETfon Manual Del Usuario página 81

General
It is the default profile and does not change in any way the ring set up
by the user.
Meeting
It makes sure that, in case of call, the ring is internal ringer and that
lasts only 2 seconds. This setting is useful to reduce the trouble of the
ring in particular situations as for instance a "work meeting".
Silent
No ring is heard in case of incoming calls. This setting is useful in
case you do not want to be disturbed by the ringer. The incoming call
is signalled in any case: through the display and the led lights on.
NETfon - Operating instruction 79