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Cellular forums Home > Archive > Cellular GSM Technology > May 2005 > Coding convention of ISO/IEC 7816-6??
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Coding convention of ISO/IEC 7816-6??
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| Hi there,
For the coding convention of a particular EF in a USIM card, the 3GPP
31102 TS mentions that the convention is according to ISO/IEC 7816-6 .
Is ISO/IEC 7816-6 available as a free download? If yes, can someone
pass the URL for the same.
EF-SPDI, a 3G file in USIM is a constructed TLV. EF-SPDI is a
transaprent file. The contents of this file are the 3 byte PLMN
entries. The TS 3GPP 31102 mentions that the length of this file
depends on 3*n ( 3 is the number of bytes of each PLMN entry and 'n' is
the number of PLMN entries). It says that " the length can be coded in
one or more bytes".
This statement is kind of misleading. If n=90, the length would be 270
in decimal which means length needs to be reprsented in 2 bytes.
No mention of the coding convention for this file in the 3G PP TS. It
says all coding conventions are that of ISO/IEC 7816-6.
Any tips or pointers on this problem is appreciable.
Thanks in advance.
regards
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| John Henderson 2005-05-19, 11:56 am |
| USIM wrote:
> Hi there,
>
> For the coding convention of a particular EF in a USIM card,
> the 3GPP 31102 TS mentions that the convention is according to
> ISO/IEC 7816-6 .
>
> Is ISO/IEC 7816-6 available as a free download? If yes, can
> someone pass the URL for the same.
>
> EF-SPDI, a 3G file in USIM is a constructed TLV. EF-SPDI is a
> transaprent file. The contents of this file are the 3 byte
> PLMN entries. The TS 3GPP 31102 mentions that the length of
> this file depends on 3*n ( 3 is the number of bytes of each
> PLMN entry and 'n' is the number of PLMN entries). It says
> that " the length can be coded in one or more bytes".
>
> This statement is kind of misleading. If n=90, the length
> would be 270 in decimal which means length needs to be
> reprsented in 2 bytes.
>
> No mention of the coding convention for this file in the 3G PP
> TS. It says all coding conventions are that of ISO/IEC 7816-6.
>
> Any tips or pointers on this problem is appreciable.
See
http://webapp.etsi.org/action/PU/20...220v070000p.pdf
clause 7.1.2.
John
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