The required protection against any unauthorized access through the MMI, PEI, or unintentional access by other
means is carried out through the special mechanisms. The encryption of stored messages preventing from accessing
the memory directly and the user authentication protect SDS messages. Protected messages cannot be read on the
radio MMI unless valid authentication occurs. For the user authentication, the existing radio PIN is used.
SDS messages received by the radio are encrypted before being stored in the Inbox. Store and Forward messages are
encrypted before being saved in the Outbox.
Received call out messages are encrypted before being stored in the CO Box.
If the feature is enabled, then the radio prompts you to enter the PIN if any of the following menu items are selected
from the MMI.
• Messages → Inbox.
• Messages → Outbox.
• Messages → CO Box.
Following successful PIN entry and access to the required messages, the radio does not require further PIN entries to
access messages unless one of the following conditions has been met.
• Exiting from the radio menu.
• Turning off the radio.
• Changing the PIN from the MMI.
If you disable the PIN lock through the MMI or change the PIN, the protected messages are deleted. Before deleting
the messages, you are prompted to ensure that the operation should proceed. If the PIN lock is changed through the
PEI, all the protected messages stored in the Inbox, Outbox, and CO Box are deleted. On enabling the radio
permanent disable, the access to the protected messages is lost.
Store and Forward
This feature allows communicating with each other without being available at the same time. If the destination is not
reachable, the message is stored in the system (if supported) until it is available or the expiration time is exceeded.
The system is configured to delete the message after a preconfigured time and this time cannot be configured using
the radio.
You can send the store and forward messages to an individual address or a group. Depending on the codeplug
settings, if you choose to send it to the group, the message status is switched from Store and Forward to Immediate.
When the Sending group message to Store and Forward Server is enabled, an SDS message sent to a group is
conveyed with assistance of the store and forward service. The radio sends Store and Forward SDS to group only with
Delivery Report Request set to None by the service provider. For Store and Forward SDS to an individual address,
the radio can send SDS with any Delivery Report Request (None, Received, Consumed, Received and Consumed) the
user set (via MMI or via codeplug settings). The radio does not request a delivery report, thus you are not notified of
the delivery status.
Note: Verify whether the infrastructure system supports this functionality.
SDS Receive Failure Notification
When a radio fails to decrypt a received SDS message, it displays a notification including the ISSI of sender and
reason for failure.
Security Services
The radio provides TETRA security features as described in the TETRA Security ETS 300 392-7 standard, TTR
001-11 TIP, and TTR 001-13 TIP.
Services and Features | 39
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