scope:

The common functional architecture for support of Mission Critical (MC) services is specified in 3GPP TS 23.280 [21].

The functional architecture for support of Mission Critical Push To Talk (MCPTT) services is specified in 3GPP TS 23.379 [18].

The functional architecture for support of Mission Critical Video (MCVideo) services is specified in 3GPP TS 23.281 [19].

The functional architecture for support of Mission Critical Data (MCData) services is specified in 3GPP TS 23.282 [20].

This 3GPP Technical Specification (TS) specifies:

1. The interactions between the MC Service User Database and the MC Service Server:

- This interface between the MCPTT User Database and the MCPTT Server is referred to as the MCPTT-2 reference point, as specified in 3GPP TS 23.379 [18].

- This interface between the MCVideo User Database and the MCVideo Server is referred to as the MCVideo- 2 reference point, as specified in 3GPP TS 23.281 [19].

- This interface between the MCData User Database and the MCData Server is referred to as the MCData-2 reference point, as specified in 3GPP TS 23.282 [20].

- This interface between the MCData User Database and the MCData Server is referred to as the MCVideo-2 reference point, as specified in 3GPP TS 23.282 [20].

2. The interactions between the MC Service User Database and the Configuration Management Server. This interface is referred to as the CSC-13 reference point.