-> Beg pardon?  Sure you can.  non-standard PL's are used in a number of
-> applications, such as a local SO we have, that has had a problem with
 MS> But non-standard tones aren't common. The wide majority of business
 MS> users, hams, and public safety use the common, standard tones...
Yeah, but I fail to see your point.
Non-standard tones, are just that.  Non-standard, ie not used as much
as standard tones.  
 MS> BTW, need your email address (internet) so I can send you a message...
I believe you found it.  I will reply this weekend, with some information
for you.  Hope it helps.
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