Read & Write AT commands on S60 2nd edition phones

Hey folks,

I have been searching and testing since a couple of days but haven't been able to get the correct working code for writing and reading AT commands on S60 2nd editions phones.

I have also tested the code of the "glassterm" example available with the SDK. But no success as yet.

I have tested with the ports COMM::0 and DATAPORT::0 and DATAPORT::1, but its not working....The execution goes in an endless wait loop..whereas according to my knowledge, AT commands are immediately issued and response is also received instantly....

Can someone please give a COMPLETE, correct and working code for issuing AT commands???

Note: I am using S60 2nd edition FP2 SDK and testing on Nokia 6600 and 6670.
I tried the following AT commands: "AT\r" and "AT+CGMM\r\n"

Some Symbian-scholar plz reply....