GPRS Connection From One GPRS Modem to another ???

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m_h_heydarchi

Joined: 29 Mar 2005
Posts: 5

29 Aug 2009 8:54 gprs connection

Hi
I want to connect from one GSM/GPRS Modem to another GSM/GPRS.
Both GSM/GPRS modems is same.
I can use Telit, Sim300 or Q2403A(WaveCom) Modems.
I want to know how i can connect from one modem to another when i haven't IP of modems. Just, i know phone number of the modems.
i know IP is dynamic in GPRS Network.
please guide me.
Thanks
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GSM Man

Joined: 15 Apr 2009
Posts: 357
Helped: 46
Location: New Jersey, USA

29 Aug 2009 15:00 gprs at command sequence for connectivity

You need to have a service plan from your provider that will allow you to accept incoming connection requests. By default all providers that I know of have that disabled.

So what you have to do then is communicate the IP address assigned to the devices to each other. You can do this by sending an SMS message, sending them to a server that you use to cache the adddress or by using a dynamic IP hosting service.

m_h_heydarchi

Joined: 29 Mar 2005
Posts: 5

30 Aug 2009 10:11 gprs modem at command list

My desired connection type is TCP, i want to use alive connection.
I can browse pages(like www.google.com, etc) and send email by our server(SMTP Server) .
But i want to know how can i connect to another gprs modem when just i know phone number. i want to connect directly to another GPRS Modem without sending SMS that contain my IP address.
Is there any way to find IP of the phone number?
Is there any services for this purpose?

GSM Man

Joined: 15 Apr 2009
Posts: 357
Helped: 46
Location: New Jersey, USA

30 Aug 2009 16:01 requirements for gsm/gprs modem connectivity

m_h_heydarchi wrote:

Is there any way to find IP of the phone number?
Is there any services for this purpose?

Unless you pay your server provider to have a 'fixed IP address', the Modem's IP address is dynamically assigned. Therefore, there is no way to determine what it is from the phone number. It's like asking someone to provide a PC's IP address based on the street address.

hne573

Joined: 26 Feb 2009
Posts: 16
Helped: 4

31 Aug 2009 9:49 how to send email by gprs modem

Hi m_h_heydarchi,

Can you send email with GPRS connection with AT Commands?
You write in this post that you can do it.

Please write AT Command that used for it in this post for helping.

Thank you.

m_h_heydarchi

Joined: 29 Mar 2005
Posts: 5

31 Aug 2009 10:48 how gprs connection software gsm module

Hi GSM Man
I have a different viewpoint in this case.
Whereas the service provider assigns IPs to clients, it can have a lookup table that contains every IP and phone number. Then we need a command for request the IP of phone number.
But perhaps it hasn't the lookup table or command that provides this service for us.

Added after 9 minutes:

Hi hne573
I used a telit "GM862" module for this purpose.
It has some commands for sending Email.
You can download it and read the AT Command list.
In Datasheet is some samples for commands.
I will put here sequence of my connection soon.

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GSM Man

Joined: 15 Apr 2009
Posts: 357
Helped: 46
Location: New Jersey, USA

31 Aug 2009 13:22 modem at commands for gprs connections

m_h_heydarchi wrote:

No service provider that I'm aware of has this service.

m_h_heydarchi

Joined: 29 Mar 2005
Posts: 5

01 Sep 2009 8:46 does a non gprs gsm phone have a modem

Thanks for your information.

choto

Joined: 08 Jun 2009
Posts: 5

01 Sep 2009 9:12 connecting to gprs modem

Hey it seems you hve worked alot on GSM/GPRS stuff. i need help. i am using sim340 gsm/gprs modem and i want to connect gsm/gprs modem to other gsm/gprs modem. I have established connection successfully in non transparent mode for CSD calls but now I want to establish connection in transparent mode. can u plz send me set of commands that are required to connect two modems in transparent mode.

As, for non transparent CSD calls no IP etc. is required, do we need any IP in case of transparent CSD calls??? Is transparent call same as GPRS?

Symmetry TME

Joined: 14 Aug 2009
Posts: 5

11 Sep 2009 1:19 sim340 read phone number

Here is a basic guide for GPRS connections using Telit modems.

http://www.semiconductorstore.com/pdf/newsite/Telit/Easy_GPRS_Guide.pdf

Hopefully this helps.

-B

GSM Man

Joined: 15 Apr 2009
Posts: 357
Helped: 46
Location: New Jersey, USA

11 Sep 2009 1:57 Re: GPRS Connection From One GPRS Modem to another ???

Symmetry TME wrote:

Here is a basic guide for GPRS connections using Telit modems.
http://www.semiconductorstore.com/pdf/newsite/Telit/Easy_GPRS_Guide.pdf

The 'AT' commands that control the phone and GSM sub-systems of the radio are defined by ITU-T and ETSI standards that all manufacturers follow. However, there is not currently any standard that defines a set of 'AT' commands for GPRS communications. Due to a lack of a standard every manufacturer defines their own proprietary set of commands for controlling GPRS.

Therefore, the commands in the Telit manual that the above link points to don't apply to the SIMCom SIM340 - it uses a totally different set of commands. The document that describes how to use transparent mode on the SIMCom modules can be downloaded at: http://www.madeeasykits.com/Docs/SIM_TCPIP_Application_Note.pdf

anshulsain

Joined: 03 Oct 2009
Posts: 2
Location: Gurgaon

03 Oct 2009 6:53 GPRS Connection From One GPRS Modem to another ???

I M TRYING TO DIAL OUT A NUMBER FOR DATA CALL FROM MY GPRS MODEM .BUT I UNABLE TO CONNECT BUT ON THE SAME IF I TRY TO CONNECT FRO VOICE CALL IT IMMIDIATELY CONNECT ....
FOR DATA CALL..ATDT+919999955555
FOR VOICE CALL..ATDT+919999955555;
PLZ HELP ME TO SORT OUT MY PROBLEM