SIM卡的data structure中定义了一个MBDN 不知道是什么内容
------解决方案--------------------
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 alpha tags 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 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 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 alpha identifier) may be different to the length denoted X in EFADN.