Assertion: phone system's line | /r/HasProperty | busy
Facets:
value: for all users
type: TRANSITIVE-OBJECT
value: often
type: DEGREE
Source sentences:
text: This often led to traffic congestion in the telephone network, as the line to a destination telephone was often busy.
text: Each extension in a phone system is normally linked to a voice mailbox, so when the number is called and the line is not answered or is busy, the caller listens to a message previously recorded by the user.
text: Such extension phones allow making or receiving calls in different rooms, for example in a home, but any incoming call would ring all extensions and any one extension being in use would cause the line to be busy for all users.