4.2.7 EF_ACMmax (ACM maximum value)

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

If service n° 13 is "available", this file shall be present.

This EF contains the maximum value of the accumulated call meter.

Identifier: ‘6F37’		Structure: transparent			Optional
File size: 3 bytes			Update activity: low
Access Conditions: READ PIN UPDATE PIN/PIN2 (fixed during administrative management) DEACTIVATE ADM ACTIVATE ADM
Bytes	Description			M/O		Length
1 to 3	Maximum value			M		3 bytes

‑ Maximum value.

Contents:

– maximum value of the Accumulated Call Meter (ACM).

Coding:

First byte:

		b8		b7		b6		b5		b4		b3		b2		b1
		223		222		221		220		219		218		217		216

Second byte:

		b8		b7		b6		b5		b4		b3		b2		b1
		215		214		213		212		211		210		29		28

Third byte:

		b8		b7		b6		b5		b4		b3		b2		b1
		27		26		25		24		23		22		21		20

For instance, ’00’ ’00’ ’30’ represents 25+24.

All ACM data is stored in the USIM and transmitted over the USIM/ME interface as binary.

ACMmax is not valid, as defined in TS 22.024 [3], if it is coded ‘000000’.

If a GSM application is present on the UICC and the ACMmax value is to be shared between the GSM and the USIM application this file shall be shared between the two applications.