Here is a different strategy for tackling the problem that can have some serious performance advantages:

#! perl -slw
use strict;

my $rec = chr(0) x 123;

my @type3l = split ':', '02:10:33:15:19:10:3:18:6:4';
my $n = 0;
my @type3o = map{
    $n += $_; $n - $_;
} @type3l;

my @type3 = map \substr( $rec, $type3o[ $_ ], $type3l[ $_ ] ), 0 .. $#
+type3o;

my @typeOl = split ':', '02:98:11:9';
$n = 0;
my @typeOo = map{
    $n += $_; $n - $_;
} @typeOl;

my @typeO = map \substr( $rec, $typeOo[ $_ ], $typeOl[ $_ ] ), 0 .. $#
+typeOo;

while( <DATA> ) {
    substr( $rec, 0 ) = $_;
    if( /^03/ ) {
        print join '/', map $$_, @type3;
    }
    else {
        print join '|', map $$_, @typeO;
    }
}

__DATA__
03002068454210482                            000000004204.572011-04-14
+ 19:53:41INTERNET  C  750467375                   ^M
0214833                                                               
+                              G02042954           ^M
03002068703214833                            000000002558.662011-04-15
+ 08:17:19INTERNET  C  761212737                   ^M
0211561                                                               
+                              05601207284         ^M
03002068802911561                            000000001463.702011-04-15
+ 08:40:52INTERNET  C  719807216                   ^M
029911                                                                
+                              00100275296         ^M
[download]

Produces:

c:\test>junk92
03/0020684542/10482                            /000000004204.57/2011-0
+4-14 19:53:41/INTERNET  /C  /750467375         /      /
02|14833                                                              
+                               |G02042954  |
03/0020687032/14833                            /000000002558.66/2011-0
+4-15 08:17:19/INTERNET  /C  /761212737         /      /
02|11561                                                              
+                               |05601207284|
03/0020688029/11561                            /000000001463.70/2011-0
+4-15 08:40:52/INTERNET  /C  /719807216         /      /
02|9911                                                               
+                               |00100275296|

[23:23:38.05] c:\test>
[download]