Question

How to make a GSM Data call

Asked by: annnn

I've been trying to get some useful links on steps on making a GSM data call from a GSM phone to another GSM phone. But haven't been able to find a complete document with the AT commands that are required for making a data call. can somebody plz provide somelinks how data calls can be made between GSM phones? thanks in advance

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Asked On
2004-05-20 at 06:28:35ID20996127
Tags

data

,

gsm

,

call

Topic

Global System for Mobile Communications (GSM)

Participating Experts
3
Points
500
Comments
5

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Answers

 

by: joghurtPosted on 2004-05-21 at 00:43:44ID: 11124511

"AT+FCLASS=0"
(it tells to use data mode)

"AT+CBST=14,0,1"
(use 14400 Baud)
or
"AT+CBST=7,0,1"
(use 9600 Baud, because not all GSM providers support 14,4k)

"ATD12345678"
(to call the phone number)

(send/receive data)

Send
"+++"
(and wait 3 seconds to hold the connection)
then
"ATH"
to hang up the connection
or
"ATO"
co return to data mode.

 

by: basingstokebearPosted on 2004-05-21 at 09:28:56ID: 11128152

Hi,

Depending on your gsm modem the settings can sometimes vary..

I would suggest that you only need to use the ATD command to dial out and leave all other settings as default.
You can make sure you are registered by using the AT+CREG? command.. response is 0,1 for registered.
The recieving modem can have auto answer enabled (ATS0=1) or you can manually type ATA to answer the call.

The single biggest hurdle is geting the data number enabled correctly by the network!

Here is a link to an FAQ I wrote on the subject...

http://www.tdc.co.uk/technical/downloads/faq/faq-04-01.zip

 

by: MeffPosted on 2004-05-31 at 19:14:26ID: 11199743

Your question is close to http://www.experts-exchange.com/Programming/Wireless_Programming/GSM/Q_21001235.html
1. List of AT commands
You get it by www.esti.fr free of charge, but will need a few in beginning only:
AT+CPIN to send PIN number
ATD123456789 to start to call
May you will need the commands to change the baudrate or to switch on or off handshake.
On http://www.gsm-modem.de/gsm-modem-faq.html you will find the basic commands with some remarks how to use it.
2. Single / multi numbering
More on that on http://www.gsm-modem.de/gsm-data-call.html
3. Incoming data calls
Most time outgoing is supported only. You have to requests for the service for incoming data calls (CSD) may be
Regards
Meff
Webmaster of
www.gsm-modem.de

20120131-EE-VQP-002

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