Topology

Optional (NOTE 1)

All

Priority Indicator

Optional (NOTE 2)

0-15 (NOTE 3)

Emergency Indicator

Yes

Not Applicable

NOTE 1: The "Topology" attribute is optional for example support of monitoring. If requested and not supported error code 444 shall be returned.

NOTE 2: This Context Attribute parameter is used for MPS as specified in 3GPP TS 22.153 [63].

NOTE 3: Priority values 11 – 15 of the Priority Indicator are reserved for MPS.