4.2.68 EF_EXT8 (Extension 8)

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

If service n°53 is "available", this file shall be present.

This EF contains extension data of a MMS Notification (Multimedia Messaging Service – see 4.2.67).

Identifier: ‘6FCF’		Structure: linear fixed			Optional
Record length: X+2 bytes			Update activity: low
Access Conditions: READ PIN UPDATE PIN DEACTIVATE ADM ACTIVATE ADM
Bytes	Description			M/O		Length
1	Record type			M		1 byte
2 to X+1	Extension data			M		X bytes
X+2	Identifier			M		1 byte

The structure of this EF is identical to the structure of EF_EXT1 (see clause 4.4.2.4).

– Record type.

Contents:

type of the record, see clause 4.4.2.4

Coding:

according to the "additional data" type

‑ Extension data.

Contents:
additional data (MMS notification extension)

Coding:

the first byte of the extension data gives the number of bytes of the remainder of the MMS notification in this record. The following bytes contain the extension of the MMS notification.

‑ Identifier.

Contents:
identifier of the next extension record (in EXT8) to enable longer storage of information.

Coding:
record number of next record. ‘FF’ identifies the end of the chain.