Question: In a User Equipment (UE) supporting Voice Group Call Service (VGCS) or Voice Broadcast Service (VBS) with AT commands, what does the `<mode>` value of `1` indicate for the `+CACSP` parameter command?
Option 1: The UE is the originator of the voice group or voice broadcast call.
Option 2: Unsolicited result code presentation for call control state attributes is enabled.
Option 3: Communication with the peer entity is enabled in both directions for downlink only.
Option 4: User connection in the uplink is not attached.
Explanation: The `<mode>` parameter in the `+CACSP` command controls the presentation of unsolicited result codes related to changes in call control state attributes. A value of `1` for `<mode>` specifically indicates that the presentation of these unsolicited result codes is enabled, allowing the Terminal Equipment (TE) to receive updates when the voice group or voice broadcast call state changes on the Mobile Terminal (MT).