If this value is set to 1, any change in comm port interface status will generate a syslog message. For example, if DSR or CD change state, a syslog message is generated so that the time and date of the event can be logged remotely. A change in interface state could mean that the monitored device has rebooted or gone offline.
The values may be:
0 - do not send interface changed messages
1 - send interface changed messages