c:\@Work\Perl\monks>perl -wMstrict -le
"my @phones = (
   '(777)1234-0000 RAM:007',   '(777) 1234-0000 RAM:007',
   '(777)  1234-0000 RAM:007', '(777)   1234-0000 RAM:007',
   );
 ;;
 my %xlate = ( '(' => '',  ')' => '-' );
 ;;
 for my $phone (@phones) {
   printf qq{'$phone' -> };
   ;;
   $phone =~ s{ ([()]) \s* }{$xlate{$1}}xmsg;
   print qq{'$phone'};
   }
"
'(777)1234-0000 RAM:007' -> '777-1234-0000 RAM:007'
'(777) 1234-0000 RAM:007' -> '777-1234-0000 RAM:007'
'(777)  1234-0000 RAM:007' -> '777-1234-0000 RAM:007'
'(777)   1234-0000 RAM:007' -> '777-1234-0000 RAM:007'