User's Guide

Networks
Authentication
Remote User Assignment (aliasing)
If your radio supports Remote User Assignment (RUA) using TETRA Interoperability Profile (TIP)
defined procedures and transactions, your presence on the network requires authentication.
RUA allows you to be authenticated onto the network by entering a user identity and optionally a PIN
(maximum 7 digit). Once accepted by the system, you can be addressed by your user identity, if
aliasing is supported by the system.
At the start of a shift, you can take a pool radio and, after you log in, other radio users on the network
can identify you by you user name. TETRA services including individual voice and data (Status and
SDS) communication can be set up using your user name (provided your user name and your
corresponding user ISSI are in the Phonebook).
If you power on your radio using the Emergency button you must log on to the network before an
Alarm call can be initiated.
Network log on/off may be initiated by your dispatcher.
To log on/off:
Your radio may be customised to request PIN entry log on to the network when powered on.
Alternatively select Menu > Networks > Log ON/OFF.
A screen appears:
Log On—enter you user ID and password then press Confirm.
Log Off—press Confirm.
Details—indicates the current log on state of the radio. and displays the user's network identity.
Change Network
If your radio is customised to use other networks, you can manually select a network from a list of
configured networks, or allow your radio to automatically use a suitable network when you move into
its coverage area.
If your radio is customises for End to End Encryption, the radio may change the End-to-End
Encryption status when the selected network is changed. It may also provide a selection of
talkgroups on other networks. If a talkgroup is selected that does not belong to the current network,
your radio will change network accordingly.
After switching to a different network, make sure that your selected talkgroup is valid for that
network. For details of talkgroup selection see Talkgroups and folders on page36.
76 SC21 Series hand-portable radio