2.7.3 Scope of Protection
The Basic and Enhanced Privacy protect only the voice and data messages (including IP/UDP
headers). The layer 2 voice and data headers, data response packets, and link control data are
not protected. This means that the source and target individual ID and Group IDs are not
protected. Control messages such as Radio Disable, Remote Monitor, Radio Check, Call Alert and
the embedded and standalone digital signaling are also not protected.
The protection is provided in all the operational modes (direct mode, repeater mode, and IP Site
Connect) and through all the communication paths between the sending radio and the destination
radio. This implies that the voice and data messages remain protected in the following situations:
• Over-the-air, in direct mode;
• Over-the-air and inside a repeater, in repeater mode; and
• Over-the-air, inside repeaters, and over the backend network, in IP Site Connect,
Capacity Plus and LCP modes.
Note that the Basic and Enhanced Privacy types do not protect the voice and data messages
between a radio and its option board or between a radio and its accessory (including a MDT). Any
data that extends past the radio network is not protected. For example, text messages from field
units to text message dispatchers or e-mail addresses on a network are not protected once they
leave the destination radio (i.e. a Control Station) or the MNIS application.
The Basic and Enhanced Privacy types protect Individual voice call, Group voice call, All system
call, Emergency Call, and all Packet data calls (i.e. Individual, Group, unconfirmed, and
confirmed).
