WiFi Network Name with Underscore Special Characters Issue

Question

Turns out that iPod Touch doesn't like wireless network names with special characters (e.g. underscores) in them (I had 2 underscores in mine).
It will establish a connection, get an IP address, even use WEP but won't talk to the Internet if the wireless access point name has an underscore in it. If you can change your wireless network name to remove the special characters the iPod Touch becomes very and will connect using the Internet.

Answer 1

I'm looking for a way to escape all characters (not only the minus sign) except for a specific character. Kind of like 'unescaping' a specific character (the '%' sign) within braces {}What about if you apply a function like regexp_replace to escape all known "specific characters", and then unescape the particular specific character again back as e.g. in
SQL>  select 'a.da-df%df*' str, replace (
                                               regexp_replace (
                                                    'a.da-df%df*',
                                                    '([[:punct:]])',
                                                    '\\\1'
                                               str2
  from dual
STR         STR2         
a.da-df%df* a\.da\-df%df\*
1 row selected.i.e. don't escape with curly brackets but with the backslash character.
You can then use this string in your query like in
WHERE CONTAINS(r.POI_NAME, '<query> <textquery grammar="context"> <progression><seq>'
||'aaab'
||'</seq><seq>'
||'aaa\-b'
||'%</seq></progression> </textquery> </query> ' ,1)> 2