The present document specifies the Trace facility for GSM where it refers to:
subscriber tracing (tracing of International Mobile Subscriber Identity (IMSI));
equipment tracing (tracing of International Mobile station Equipment Identity (IMEI)).
It does not cover:
types of trace which relate more to network elements than to individual subscribers e.g. tracing events within a
Base Station System (BSS), and so on;
tracing of all possible parties in e.g. a multi-party call, (although multiple calls related to the IMSI specified in the trace type field are traceable).
It also refers only to tracing activated from the OSF and not to that activated by means of local Man Machine Interface