SIM卡中的MBDN是什么解决办法

SIM卡中的MBDN是什么
SIM卡的data structure中定义了一个MBDN 不知道是什么内容

[解决办法]
3GPP 31.102中定义的，是SIM卡上的一个MBDN文件。具体定义如下：
EFMBDN (Mailbox Dialling Numbers)
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 alphatags for each supported mailbox. Each dialling number shall be associated with a message waiting indication group type using EFMBI (see TS 23.038 [5] for message waiting indication group types).

Identifier: '6FC7'Structure: linear fixedOptional
Record length: X+14 bytesUpdate activity: low
Access Conditions:
READPIN
UPDATEPIN/ADM
(fixed during administrative management)
DEACTIVATEADM
ACTIVATEADM

BytesDescriptionM/OLength
1 to XAlpha IdentifierOX bytes
X+1Length of BCD number/SSC contentsM1 byte
X+2TON and NPIM1 byte
X+3 to X+12Dialling Number/SSC contentsM10 bytes
X+13Capability/Configuration2 Record IdentifierM1 byte
X+14Extension 6 Record IdentifierM1 byte

For contents and coding of all data items see the respective data items of the EFADN (clause 4.4.2.3), with the exception that extension records are stored in the EFEXT6 and with the exception that Capability/Configuration parameters are stored in the EFCCP2.
NOTE:The value of X (the number of bytes in the alphaidentifier) may be different to the length denoted X in EFADN.