| Author | Message | | | eric | | Posted: Sun Aug 27, 2006 10:58 am Post subject: GSM Modem | | | | Site Admin Joined: 01 Jan 1970 Posts: 311 | Interfacing your own equipment to GSM devices has been
made difficult by the manufacturers because they don’t use
standard connectors, very little information is made available,
and a few other similar reasons. This is a pity since the AT
command set has been extended especially for GSM. These
AT commands have been used for years in ordinary modems
and are fairly easy to use. The arrival of GSM has led to the
addition of a number of commands, making the sending of
SMS messages and such like possible.
If you tried to interface an off-the-shelf GSM phone to your
own circuit, you would first have to find out which signals go
to which pins on the GSM connector. If you only need to use
AT commands, then it is sufficient to look
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