individual TETRA subscriber identity (ITSI)

The Individual Tetra Subscriber Identity (ITSI) corresponds to the Tetra address in terms of structure and number range and consists of three individual numbers.

Structure of the Individual Tetra Subscriber Number (ITSI)

The ITSI consists of the Tetra Mobile Country Code (TMCC), the Tetra Mobile Network Code (TMNC) and the Short Subscriber Identity ( SSI).

The Tetra Mobile Country Code is the country code for Tetra networks. The country code comprises 10 bits and has the number 262 for Germany. The Tetra Mobile Network Code is 14 bits long and is used together with the country code for the ITSI block identifier. The Short Subscriber Identity consists of 24 bits and identifies the end subscriber.

The ITSI addressing scheme is described in ETS 300 392-1.