4.2.60 EF_MBDN (Mailbox Dialling Numbers)

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

If service n°47 is "available", this file shall be present.

This EF contains dialling numbers to access mailboxes associated with Voicemail, Fax, Electronic Mail and other messages. It may also contain associated alpha‑tags for each supported mailbox. Each dialling number shall be associated with a message waiting indication group type using EF_MBI (see TS 23.038 [5] for message waiting indication group types).

Identifier: ‘6FC7’		Structure: linear fixed			Optional
Record length: X+14 bytes			Update activity: low
Access Conditions: READ PIN UPDATE PIN/ADM (fixed during administrative management) DEACTIVATE ADM ACTIVATE ADM
Bytes	Description			M/O		Length
1 to X	Alpha Identifier			O		X bytes
X+1	Length of BCD number/SSC contents			M		1 byte
X+2	TON and NPI			M		1 byte
X+3 to X+12	Dialling Number/SSC contents			M		10 bytes
X+13	Capability/Configuration2 Record Identifier			M		1 byte
X+14	Extension 6 Record Identifier			M		1 byte

For contents and coding of all data items see the respective data items of the EF_ADN (clause 4.4.2.3), with the exception that extension records are stored in the EF_EXT6 and with the exception that Capability/Configuration parameters are stored in the EF_CCP2.

NOTE: The value of X (the number of bytes in the alpha‑identifier) may be different to the length denoted X in EF_ADN.