Description: The operational state for this port: - unknown: the status of this port is unknown (this can be the result of a module in error) - disabled-nosignal: no activity is detected at the physical layer while the port is enabled - disabled-idle:: activity from the remote device attached to this port has been detected by the physical layer. The port is disabled. - failing: an internal hard error has been detected on this port while the port is enabled - no signal: no activity is detected at the physical layer while the port is enabled - idle: activity from the remote device attached to this port has been detected by the physical layer. The port is enabled. - in-service: the remote device successfully acknowledges ILMI polling requests and SVC registration - pvcOnly: the remote device succesfully acknowledges ILMI polling requests but it rejects the ATM prefix registration. Only PVCs are supported. - misConfigured: an SSI to UNI or an SSI to NNI configuration has been detected - wrongNetworkPrefix: the switches on each end of an SSI link have incompatible network prefixes (the 12 first bytes have different values) - wrongNodeNumber: the switches on each end of an SSI link have the same ATM node Numbers. - failing-line: the port is enabled and a invalid signal is detected on the line - disabled-failing: the port is disabled and an anomaly is detected, either internal or external. - wrap-no-signal: the port is internally wrapped so that all the traffic received on the attached line is returned unchanged on the line. No activity is detected at the physical layer. - wrap-idle: the port is internally wrapped so that all the traffic received on the attached line is returned unchanged on the line and a valid signal is detected on the line. - wrap-failing-internal: an internal failure has been detected when the port has been turned into the wrap-reply state. The actual state of the port is undefined. - wrap-failing-line: the port is internally wrapped so that all the traffic received on the attached line is returned unchanged on the line and an invalid signal is detected on the line.

When disabled, the port may be in only one of the following states: - unknown, disabled-failing, disabled-nosignal or disabled-idle.