GSM 09.02 - Version 5.3.0 - Digital cellular telecommunications - ETSI

Page 394
GSM 09.02 Version 5.3.0: August 1996
17.3.1.2 Subscriber data modification procedure
The OMC can modify the subscriber data in several different ways. The modifications can be categorized
in five groups:
a) HLR internal modification, no effect in the VLR;
b) data shall be modified both in the HLR and VLR;
c) withdrawal of a basic service or a supplementary service;
d) modification affects on the roaming of the subscriber and the subscriber shall be removed from the
VLR data base;
e) authentication algorithm or authentication key of the subscriber is modified.
In case "b" the MAP_INSERT_SUBSCRIBER_DATA service is initiated in the HLR.
In case "c" the MAP_DELETE_SUBSCRIBER_DATA service is initiated in the HLR.
In cases "d" and "e" the MAP_CANCEL_LOCATION service is initiated in the HLR.
If the result of a primitive received from the VLR is unsuccessful, the HLR may initiate re-attempts; the
number of repeat attempts and the time in between are HLR operator options, depending on the error
returned by the VLR.
The subscriber data modification procedure in the HLR is shown in the figures 17.3/4, 17.3/5 and 21.7/2.