Special Access Control Class
Value range: Check box, including level 11 forbidden,level12
forbidden,…till level 15 forbidden
Content: I.e. 11~15 bits of “AC”. It is
used for load control, permitting or
forbidding the network access of some special level users. “1” stands for
forbidden and “0” for permitted.
Recommendation:
00000
For
some special subscribers, GSM specifications have reserved five special access
levels 11-15, which usually have higher access priority. A special subscriber
can have one or multiple access levels (between 11 and 15) at the same time,
which are also stored in the SIM card of the subscriber.
For
subscribers with the access levels 0-9, their access right is also applicable
to the home PLMN and visit PLMN. For subscribers with the access levels 11-15,
their access right is only applicable to the home PLMN. For subscribers with
the access levels 12, 13 and 14, their access right is applicable to the area
of the country to which the PLMN belongs.
Subscribers
with the access level 11-15 have a higher access priority than those with the
access levels 0-9.
The
access level control parameter consists of 16 bits: C0-C15,
which respectively corresponds to 15 access levels in bit mapping mode (C10 is
used for permitting emergency call). When a bit is 1, it indicates not to allow
MS with the corresponding level to access then cell. Otherwise it indicates to
allow the access.
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