4.2.15 EF_ACC (Access Control Class)

31.1023GPPCharacteristics of the Universal Subscriber Identity Module (USIM) applicationRelease 17TS

This EF contains the assigned access control class(es). The access control class is a parameter to control the access attempts. 15 classes are split into 10 classes randomly allocated to normal subscribers and 5 classes allocated to specific high priority users. For more information see TS 22.011 [2].

Identifier: ‘6F78’		Structure: transparent			Mandatory
SFI: ’06’
File size: 2 bytes			Update activity: low
Access Conditions: READ PIN UPDATE ADM DEACTIVATE ADM ACTIVATE ADM
Bytes	Description			M/O		Length
1 to 2	Access control classes			M		2 bytes

‑ Access control classes

Coding:

– each ACC is coded on one bit. An ACC is "allocated" if the corresponding bit is set to 1 and "not allocated" if this bit is set to 0. Bit b3 of byte 1 is set to 0.

Byte 1:

		b8		b7		b6		b5		b4		b3		b2		b1
		15		14		13		12		11		10		09		08		Number of the ACC (except for bit b3)

Byte 2:

		b8		b7		b6		b5		b4		b3		b2		b1
		07		06		05		04		03		02		01		00		Number of the ACC