The atmNetworkCTP object class is used when the Network View only is provided. Every client CTP is supported by an underlying server layer TTP (identified through the linkTP). The relatedAtmTTP attribute is used to associate the final CTP of a VCC or VPC with the same layer Trail Termination Point. Other attributes reflect the VCI/VPI (depending on network layer), traffic descriptors, and quality of service class. The relatedTrafficDescriptors attribute may be used to point to the traffic descriptor profile at points where ingress and/or egress UPC/NPC functions are performed or when the relatedAtmTTP attribute points to an instance of the atmNetworkTTP object class. The object pointed to by the relatedTrafficDescriptors attribute may also contain QOS information. The tmnCommunicationsAlarmInformationPackage allows the reporting of communications alarms associated with the atmNetworkCTP. When an AIS or RDI failure is detected and this package is present, the atmNetworkCTP object shall generate a communicationsAlarm notification with the probableCause parameter value set equal to aIS or farEndReceiverFailure, respectively. The conditional package oamCellLoopbackPkg provides the M-ACTION used to request the termination point to insert an OAM cell for downstream loopback and to report whether or not the cell was returned within the required time.
Sources for this description
ATM Forum M4 official network view CMIP specifications