Individual Short Subscriber Identity (ISSI)
TETRA term for a unique, individual ID assigned for each radio.
See also:
Short Subscriber Identity on page 66
Individual TETRA Subscriber Identity (ITSI)
Consists of ISSI plus MCC and MNC codes.
See also:
Individual Short Subscriber Identity on page 61
Mobile Country Code on page 62
Mobile Network Code on page 62
ISSI
Individual Short Subscriber Identity
ITSI
Individual TETRA Subscriber Identity
Key
Each device involved in secure communications is loaded with a multi-digit encryption variable ? an encryption key.
An encryption algorithm built into the device uses this key to encrypt voice or data as needed. Only devices in the
system with the same algorithm and encryption key can decode the encrypted signals.
See also:
Encryption on page 59
LIP
Location Information Protocol
Local Site Trunking (LST)
Allows radio subscribers of the same cell site to communicate when the link between the site and network central
controller fails. Entering and exiting Local Site Trunking (that is, returning to Site Wide Trunking) is done
automatically ? the display shows the ?Local Area Service? message Any call in progress is dropped upon entering
Local Site Trunking mode. Registration, Group Call, and Emergency Call are available in Local Site Trunking.
See also:
Central Network Equipment on page 58
Location Request/Response Protocol (LRPP)
This protocol allows for a single and efficient format of passing location information (requests and responses).
LRPP
Location Request/Response Protocol
LST
Local Site Trunking
Glossary | 61
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