Warwick, at 21:03 on Apr 18 1996, you wrote to Bill Grimsley...

BG> Result Codes    X0      X1      X2      X3      X4 
BG> 6/NO DIAL TONE                  *               *   
BG> 7/BUSY                                  *       *

WE> I have seen the above in the manual, but not knowing how to interpret it, I
WE> could not use it until now. I have entered atx=3, so will see what happens.

Wrong syntax.  You need to enter ATX3 for it to work.
 
WE> Does entering the command as I have done become permanent,

No, not unless you write it to the modem's NVRAM with &W.  When the
modem is powered down, it will revert to the default X4 when turned on
again.

WE> and if not, how does one make a permanent change. I don't see anything in 
WE> the manual about the subject??

Not sure if you need to use X2 or X3, but assuming the latter, initialise
your Sportster with AT&F1X3&W, then simply use ATZ thereafter.

And I can assure you that this IS clearly detailed in the manual.  :)

Regards, Bill

--- Msgedsq/2 3.20