It's been a long time since I've ever had to edit AT commands on
modems.  In my pppscript file, I have an AT command line.  But when I go
to edit it, I get either script failures or it doesn't do what I need it
to.  How do I modify the command line when dealing with a couple of
different AT commands?  Such as AT&, AT*, etc.  Currently I have AT&FH0
in my command line, but need to add some other variables.  Do I add them
all in one string or can or should I do them in multiple lines?