CoS Mapping

In this user interface, you can configure and query the related parameters of mapping the ATM service classes to the class of service (CoS) priorities.

Navigation Path

In the NE Explorer, select an NE and choose Configuration > ATM Service Management from the Function Tree. Click the CoS Mapping tab.

Parameters

**Table 1** Descriptions of the parameters for CoS Mapping by NE
Field	Value	Description
Index	Example: 1	Indicates the PW index. The PW in alarm can be located according to the Monitored Object value.
PW ID	Example: 5	Displays the ID of the PW.
CoS Mapping	Example: 1(DefaultAtmCosMap)	Selects the policy of mapping different ATM service classes to CoS priorities. In this way, different quality assurance is provided for different ATM services.

CoS Mapping

**Table 2** Descriptions of the parameters for CoS Mapping
Field	Value	Description
Mapping ID	Example: 3	Displays the ID of the table of mapping the ATM service classes to the CoS priorities.
Name	Example: mapping_1	Displays the name of the table of mapping the ATM service classes to the CoS priorities.
Service Type	UBR, CBR, RT-VBR, NRT-VBR, UBR+	Displays the ATM service classes. UBR is the ATM service with an unspecified bit rate. The UBR service is used in a non-real time manner, but no quality of service (QoS) assurance is available. Therefore, it is suitable for transmitting IP data packets. CBR is the ATM service with a constant bit rate. The CBR service applies to the connection that requires static bandwidth. In general, it supports real time services that require strict delay change (for example, the audio, imaging, and circuit emulation services). RT-VBR is the ATM service with a real time variable bit rate. The RT-VBR service is used in a real time manner and has a strict restriction on the delay. It mainly supports the audio and video services. NRT-VBR is the ATM service with a non-real time variable bit rate. The NRT-VBR service is used in a burst and non-real time manner. It can ensure a very low ratio of cell loss but has no restriction on the delay. The UBR+ service supports the setting of the MCR parameter. There are UBR+ services on many NodeBs. The UBR+ services are configured with the MCR. When the service rate does not exceed the configured MCR, the normal service transmission is ensured. The features of the UBR+ service other than the MCR are the same as the features of the UBR service.
CoS	Example: BE	Displays the CoS priority.