comment on

Assumption:

the data after __DATA__, were what you have in your array variable named @check
You have only T1 interface in your data

If true, then try this:

use warnings;
use strict;

my $host      = "";
my $interface = "";
my $PRIList   = "";
my $T1List    = "";
my $T1Count   = 0;
my $PRICount  = 0;

my @check = grep { chomp $_; $_ } <DATA>; 

for (@check) {
    if (m{([0-9]/[0-9]/[0-9])$}) {  
        $T1Count++;
        $interface = $1;
        $T1List .= $interface . "\n";
    }
    elsif (m{pri-group}) {
        $PRICount++;
        $PRIList .= $interface . "\n";
    }
}

if ( $T1Count > 0 ) {
    print "T1 Controller Summary:\n\n";
    print "$T1Count total T1 interfaces\n";
    print $T1List;
    print "$PRICount total voice PRI(s)\n";
    print $PRIList;
}
else {
    print "No T1 interfaces found";
}

__DATA__
controller T1 0/0/0
  framing esf
  linecode b8zs
  cablelength long 0db
  pri-group timeslots 1-24
 controller T1 0/0/1
  framing esf
  linecode b8zs
  cablelength long 0db
 controller T1 0/1/0
  framing esf
  linecode b8zs
  cablelength long 0db
 controller T1 0/1/1
  framing esf
  linecode b8zs
  cablelength long 0db
[download]

OUTPUT:

T1 Controller Summary:

4 total T1 interfaces
0/0/0
0/0/1
0/1/0
0/1/1
1 total voice PRI(s)
0/0/0
[download]

NOTE: Please, the script above apply to OP originally modified script starting from the for loop.
Hope, this helps.

If you tell me, I'll forget.
If you show me, I'll remember.
if you involve me, I'll understand.
--- Author unknown to me

In reply to Re^2: Regular Expressions question by 2teez
in thread Regular Expressions question by CJXJ220

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