Hello I am new to working on zebra and my question is very similar to the following:
https://developer.zebra.com/content/scanner-programmatically-make-beep-sound-c.

The main difference is that I am using the zebra ds9308. I read the documentation for SSI and I see that the OpCode is 0xE6.

When I do something like                    

byte[] buffer = { 0xE6 };

 _comPort.Write(buffer, 0, buffer.Length);

nothing occurs and no errors are thrown but I also do not receive a beep noise.  Am I not understanding something?  The beep worked on putty when I did control + g.

For reference, I am looking also looking at 
https://www.bsr.at/mediafiles/Handbuch/Zebra/DS3600_Simple-Serial-Interface-Programmer-Guide.pdf 
page 34.

I have a feeling it is because perhaps I am not following the packet format correctly? Would really appreciate an example.

Thank you for your help!