ITU-T - International Telecommunication Union/ITU Telcommunication Sector
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ITU-T Q.1002-1988
Scope
Introduction This Recommendation defines network functions which may be necessary to support services and facilities provided by PLMNs. A summary of the network functions is given in Table 1/Q.1002. The table also indicates whether or not a function requires internetwork signalling between PLMNs (i.e.@ use of Mobile Application Part@ Recommendation Q. 1051). All functions require signalling on the radio path either as subscriber line signalling or as mobile management signalling.