States of a billing mediation agent.
'standby' - The server is prepared to become active.
'failed' - The server has failed to respond to requests.
'active' - The server has been activated to receive
requests.
'echowait' - An echo request to this
billing mediation agent and is waiting
for a response.
'nawait' - A node-alive request to this
billing mediation agent and is waiting
for a response.
'suspended' - The server has receive a stop request
from the operator.