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Cellular forums Home > Archive > Cellular GSM Technology > September 2005 > Info about phonebooks stored in a GSM SIM Card
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Info about phonebooks stored in a GSM SIM Card
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| Hi,
I'm looking for information (standard specification?) to understand the
phonebooks stored in a SIM card and their purpose. For example, how
many numbers have to be stored in the "owner phonebook" and are they
supposed to be predefined (mobile, fax,...)?
TIA for any help,
Marc
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| "fun.x" <fun.x@caramail.com> skrev i meddelandet
news:1126023254.211048.314390@g49g2000cwa.googlegroups.com...
> Hi,
>
> I'm looking for information (standard specification?) to understand the
> phonebooks stored in a SIM card and their purpose. For example, how
> many numbers have to be stored in the "owner phonebook" and are they
> supposed to be predefined (mobile, fax,...)?
The SIM card memory is organized like a file system on a disk. There are
four files containing phone book entries:
Short Dial Numbers (ordinary phone book)
Fixed Numbers
Dialed Numbers
Own Numbers
You can only store one phone number in an entry. So you don't have to worry
about if it's a fax number or a mobile phone number or whatever. The length
of a file can also be zero bytes, which means that the function is not used
by the net operator/service provider. A file with Short Dial Numbers is
always present.
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| John Henderson 2005-09-13, 2:14 pm |
| fun.x wrote:
> I'm looking for information (standard specification?) to
> understand the phonebooks stored in a SIM card and their
> purpose. For example, how many numbers have to be stored in
> the "owner phonebook" and are they supposed to be predefined
> (mobile, fax,...)?
GSM 11.11 is the spec for the SIM-phone interface. Section 10
details contents of the SIM's "elementary files". The
EF-MSISDN file is the "own number" book you're looking for.
The first entry is intended for the phone's own number.
You or your carrier can put whatever you/they like in this file.
Its use and contents are entirely optional.
EF-ADN is the general SIM phonebook.
Follow http://www.3gpp.org to the specifications area to
download a copy of GSM 11.11 (there will be many "versions" to
choose from).
John
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| Joseph 2005-09-13, 2:14 pm |
| On 6 Sep 2005 09:14:14 -0700, "fun.x" <fun.x@caramail.com> wrote:
>I'm looking for information (standard specification?) to understand the
>phonebooks stored in a SIM card and their purpose. For example, how
>many numbers have to be stored in the "owner phonebook" and are they
>supposed to be predefined (mobile, fax,...)?
SIM cards have varying capacities depending on their size which can be
anywhere from 8k to 64k. A 32k card typically but not always can
store 255 names and numbers. SIM cards can generally only store names
and numbers which is different than phone memory which often can store
alternate phone numbers (work, mobile, fax, etc.) as well as other
data such as email address, web address, postal address, a note, etc.
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