Topology

Yes (NOTE 1)

See clause 5.7.9

Priority Indicator

Optional (NOTE 2)

0-15 (NOTE 3)

Emergency Indicator

Yes

YES/NO

IEPS Indicator

No

NA

ContextAttribute Descriptor

No

NA

ContextIdList Parameter

No

NA

AND/OR Context Attribute

No

NA

NOTE 1: Stream ID in Topology Descriptor shall not be supported (because only used for SRVCC service support, which is a monomedia type of call ("voice call").

NOTE 2: This Context Attribute parameter is allowed in ETSI TISPAN Ia Profile version 3. It is also used for MPS as specified in 3GPP TS 22.153 [39].

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