  The emission from PSR J1107-5907 is erratic. Sometimes the radio pulse is
undetectable, at other times the pulsed emission is weak, and for short
durations the emission can be very bright. In order to improve our
understanding of these state changes, we have identified archival data sets
from the Parkes radio telescope in which the bright emission is present, and
find that the emission never switches from the bright state to the weak state,
but instead always transitions to the off state. Previous work had suggested
the identification of the off state as an extreme manifestation of the weak
state. However, the connection between the off and bright emission reported
here suggests that the emission can be interpreted as undergoing only two
emission states: a bursting state consisting of both bright pulses and nulls as
well as the weak-emission state.
