Error with at+wmux=1 urgent!

Legacy Open AT
1

HELLO!!!

I HAVE A FASTRACK SUPREME 20 AND I NEED TWO SERIAL LINK INTERFACE BUT WHEN I SEND AT+WMUX=1 THE MODEM RETURN ME ERROR, WHAT IS HAPPENING? NEED I A NEW FIRMWARE OR ACTIVATE SOME FEATURE?
I NEED SWITCH FROM ONLINE MODE TO OFFLINE MODE WHEN I’M RECIVE DATA FROM A SERVER, IT STOP AND THE MODEM DON’T RETURN FROM ONLINE MODE. AFTER I NEED SEND AT COMMANDS.

I TRY SWITCH FROM ONLINE TO OFFLINE WITH THE SECUENCE “+++” BUT SOMETIMES RETURN TO OFFLINE AND SOMETIMES NO.

WHAT I DO?

THANKS

2

Hi,
The removal of WMUX from AT software has been done from OS 6.60 and replaced by CMUX that is an official standard, i.e. CMUX 27.10 (GSM standard multiplexing).
Using this command would enable multiplexing. AT commands can be sent(on another DLC) when the data communication is in progress.