This MIB object reports the current SIP alarm state for each line. generalErrorAlrm - set when an error occurs that doesn't have an RFC supported error condition networkErrorAlrm - set when a network error occurs such as DNS failure or ICMP destination unreachable callLegSentAuth - set when the callLeg has sent authorization information due to a authorization required response regClientSentAuthReq - set when the registration client has sent authorization information due to a authorization required response authFailAlrm - set when authentication failed during registration or callLeg authorization after authorization information was sent registrarLocAlrm - set by the register client when REGISTER messages timeout (Loss of communications) proxyLocAlrm - set when CallLeg messages timeout (Loss of communications)