Agenda Definition of terms Dialling & Man Machine Interface (MMI) Addresses and Identities Numbering and Addressing Call Scenarios
Definition of terms (as used in this presentation) DIALLING - Identity exchange mechanism between User and Terminal ADDRESSING - Identity exchange mechanism over air- interface NUMBERING - decimal representation of air-interface addresses as seen by the user i.e. user visible numbering
TETRA Dialling & MMI Man-Machine Interface MMI - ETR 294 Full dialling Mode keys Soft keys Display scrolling Number presentation (CLI & TPI) with mnemonics Special numbers e.g. 999/ 112 Leading Digit dialling - ETR ID exchange between user and terminal
TETRA Addressing MOBILE NETWORK IDSHORT SUBSCRIBER ID SHORT SUBSCRIBER IDENTITY (SSI) MOBILE COUNTRY CODE (MCC) MOBILE NETWORK CODE (MNC) 24 BINARY BITS 7/8 DECIMAL DIGITS 10 BITS 3/4 DIGITS 14 BITS 4/5 DIGITS 24 BINARY BITS
Family of TETRA Addresses (ITSI) INDIVIDUAL TETRA SUBSCRIBER IDENTITY (ATSI) ALIAS TETRA SUBSCRIBER IDENTITY (GTSIs) GROUP TETRA SUBSCRIBER IDENTITIES HOME NETWORK (V)ATSI VISITING ALIAS TETRA SUBSCRIBER IDENTITY (V)GTSIs VISITING GROUP TETRA SUBSCRIBER IDENTITIES VISITING NETWORK
TETRA Addressing Plan X.121 ITU Recommendation X.121 Numbering Plan for Data Networks E.212 ITU Recommendation E.212 Numbering Plan for Public Land Mobile Terminals, e.g. GSM
Numbering & Addressing Numbering and Addressing Plans Basic Numbering Enhanced Numbering Leading Digit Dialling 4 Scenarios Home & Foreign Network PABX & E.164
Linking TETRA Addressing & Numbering SHORT SUBSCRIBER IDENTITY (SSI) MOBILE COUNTRY CODE (MCC) MOBILE NETWORK CODE (MNC) 3/4 DIGITS4/5 DIGITS7 / 8 DECIMAL DIGITS TETRA ADDRESS TETRA NUMBER
How many numbers for a TETRA Terminal? One Family of Home Network TSIs One Individual TETRA Number ITSI One Alias of individual Number ATSI One or more TETRA Group Numbers GTSIs One or more Families of Visiting Network TSIs Unassigned SSI (USSI) One Visiting Alias (V)ATSI One or more Visiting Group Numbers (V)GTSIs One telephone number E.164.
Basic TETRA Number Communication within home TETRA Network No need for algorithm selection Home dialling algorithm applies decimal value range from 0 to 16,777,215 (2 24 ) User may dial between 1 and 8 digits 7 digit with max value recommended Decimal digits are converted to binary SSI Incorrect numbers are rejected.
Enhanced TETRA Numbering Communication beyond home TETRA Network e.g. another TETRA, PABX, PSTN, ISDN Need for algorithm selection Selection of Dialling Plan Direct number entry via keypad, Mode selection buttons, Soft key menu selection, Leading Digit Dialling DTMF can be used to access services outside TETRA networks.
Leading Digit Dialling Leading Digit Dialling is the only dialling algorithm selection defined in ETR Recommended way to achieve commonality between manufacturers implementations Predefined value for E.164 gateway access is 16,777,184 Predefined value for ISDN gateway access is 16,777, more values reserved for future use.
Call Scenarios Call originating and terminating on same Network, Call originating and terminating on different Networks Calls between TETRA and PABX Calls between TETRA and E.164 (PSTN, GSM, TETRA!)
TETRA IP TETRA uses IP numbers in the same way as any other IP network Individual TETRA user can have a fixed IP number or the number can be allocated dynamically In order to do the air interface signalling, TETRA IP numbers need to be mapped to TETRA ITSIs
Conclusions TETRA dialling plansTETRA dialling plans provide the benefits of flexibility and interoperability to meet the huge variety of needs of professional users TETRA numbering plansTETRA numbering plans have flexibility to efficiently deal both with simple fleet numbers & full E.164 international numbers TETRA addressingTETRA addressing alignment allows for future interoperability/ roaming with GSM