what happens if buffer overflows in SIM300 gprs modem

[gkoumudi2000]

iam using SIM300 GSM/GPRS modem (TCP/IP) in command mode. i have a two questions. can anyone help me answering those?
1. what happens if the buffer overflows in the GPRS modem?
2. what is the significance of send ok - is it the indication of data transfered successfully to local modem or to the socket at remote end

 

[GSM Man]

1. what happens if the buffer overflows in the GPRS modem?

If communications is "violated" the module may reset or power down without warning. For reliable operations, you must be careful not to overrun the buffer, and make sure to wait until it has sent the entire response from the last command before issuing another command.