System Administration Guide: Advanced Administration

Port States

Ports can be enabled or disabled depending on the state of the port monitor that controls the ports.

State 

Description 

Serial (ttymon) port states

Enabled

The ttymon port monitor sends a prompt message to the port and provides login service to it.

Disabled

Default state of all ports if ttymon is killed or disabled. If you specify this state, ttymon sends out the disabled message when it receives a connection request.