SIM548C GPRS Activition

Hello all . . .

1st of all I am sorry to everyone that I am going to post on a problem regarding GPRS activation on my SIM548C cause its a previously discussed topic :-(
But by reading all the posts I can not get rid of my problem so that I am posting the same issue again . . .
Actually I want to send some data to a server over GPRS.
I have tested the command:

AT+CIPSTART="TCP","202.148.56.107","500",

but it results me:

OK
CONNECT FAIL // after around 60 sec
STATE: IP IND // after around 60 sec

I have also tried some other commands which are presented below with their responses:

AT+CIPSTATUS
OK
STATE: IP INITIAL

AT+CSTT?
+CSTT: "cmnet","",""
OK

AT+CSTT="gpinternet","",""
OK

AT+CIICR?
OK

AT+CIICR
ERROR

AT+CGATT=?
+CGATT: (0-1)
OK

AT+CGATT?
+CGATT: 0
OK

AT+CGATT=1
+CME ERROR: 107

So please I need suggestion . . .

Regards.
Sakibnaz

AT+CIPSTART="TCP","202.148.56.107","500",

sakibnaz

You seem to have an extra trailing comma.

Does the status change if you wait a while.. say 60 seconds ?
Is "202.148.56.107" port 500 running server software and not behind a firewall ?

Sorry Experimenter UK.
Mistakenly I wrote an extra comma at the post.
And yes after around 60 sec the module returns
CONNECT FAIL
STATE: IP IND

Also from the SIM operator I knew that the APN will be "gpinternet"
So I have tested the followings also . . .

AT+CSTT="gpinternet","",""
OK

AT+CIICR
ERROR

AT+CIFSR
ERROR

AT+CIPSTART="TCP","202.148.56.107","8080"
ERROR

Note: After setting the APN "gpinternet" I am getting error insted of "STATE: IP IND"

Plz could u guy's suggest me some AT Commands for GPRS activation. . .

Sakibnaz.

if the the network answer is
AT+CGATT?
+CGATT: 0
OK
you can't do anything it must be equal to 1

Dear Sakib,
I am sorry for late reply..
to check availablilty of your GPRS first
AT+CGREG=1;&w then enter
AT+CGDCONT=1,"IP","yourAPN" then enter
AT+CGATT=1 enter
then automatically you should be able to see +CGREG: 1
that means your GPRS is activated. but then also you can confirm it 100% by putting your SIM into mobile or modem and accessing Internet through it. if it is getting connectd to internet then your device must work. Since there are 2 types of GPRS 1) is like WAP (Internet is only possible to acess inside mobile) and 2) is Internet GPRS for PC. (internet can be acess in PC through Mobile... Please post your feedback.

Hi all.

Its done. I have activated GPRS at my SIM548C module. the problem was due to missing of some commands.

After executing the following commands i can active the GPRS:

AT+CSTT="gpinternet","",""
OK

AT+CIICR
OK

AT+CIFSR
10.130.4.76

AT+CIPSTART="TCP","67.18.89.167","8080"
OK
CONNECT OK

AT+CIPSEND
> TEST
SEND OK
CLOSED

AT+CIPSHUT
SHUT OK

Thanks all you for ur cooepration. Thanks Mejdi & Nayak for ur reply.
And at last I would like to thank Temo. actually he made this success.

Regards.
Sakibnaz