Technical information

Chapter 2: AT+i Commands Reference
May 31, 2008 AT+i Commands Reference Manual 2-113
+iMPS - Max PPP Packet Size
+iTTR - TCP Retransmit Timeout
Syntax: AT+iMPS=n
Limits the size of an outgoing PPP packet in dial-up
environments. In effect, the MPS parameter limits the W24's
MTU (Maximum Transfer Unit).
Parameters: n=0..3
Command Options:
n=0 1500 bytes
n=1 256 bytes
n=2 536 bytes
n=3 1024 bytes
Default: n=0
Result Code:
I/OK If n is within limits.
I/ERROR Otherwise.
AT+iMPS? Returns current value followed by I/OK.
AT+iMPS=? Returns the message "0-3" followed by I/OK.
Syntax: AT+iTTR=n
Sets the timeout, in milliseconds, after which an unacknowledged
TCP packet will be retransmitted over a PPP connection by W24.
Parameters: n=1000..65535
Command Options:
Default: 3000 milliseconds
Result Code:
I/OK If n is within limits.
I/ERROR Otherwise.
AT+iTTR? Reports the current value followed by I/OK.
AT+iTTR=? Returns the message "1000-65535" followed by I/OK.