diff --git a/lib/NGCP/Panel/Controller/API/Tests.pm b/lib/NGCP/Panel/Controller/API/Tests.pm
new file mode 100644
index 0000000000..6f93e46cd2
--- /dev/null
+++ b/lib/NGCP/Panel/Controller/API/Tests.pm
@@ -0,0 +1,85 @@
+package NGCP::Panel::Controller::API::Tests;
+use Sipwise::Base;
+use namespace::sweep;
+use boolean qw(true);
+use Data::HAL qw();
+use Data::HAL::Link qw();
+use HTTP::Headers qw();
+use HTTP::Status qw(:constants);
+use MooseX::ClassAttribute qw(class_has);
+use NGCP::Panel::Utils::DateTime;
+use Path::Tiny qw(path);
+use Safe::Isa qw($_isa);
+BEGIN { extends 'Catalyst::Controller::ActionRole'; }
+require Catalyst::ActionRole::ACL;
+require Catalyst::ActionRole::CheckTrailingSlash;
+require Catalyst::ActionRole::HTTPMethods;
+require Catalyst::ActionRole::RequireSSL;
+
+with 'NGCP::Panel::Role::API';
+
+class_has 'api_description' => (
+    is => 'ro',
+    isa => 'Str',
+    default => 
+        'Defines test (wake-up call) settings for subscribers.',
+);
+
+class_has 'query_params' => (
+    is => 'ro',
+    isa => 'ArrayRef',
+    default => sub {[
+    ]},
+);
+
+class_has('resource_name', is => 'ro', default => 'tests');
+class_has('dispatch_path', is => 'ro', default => '/api/tests/');
+class_has('relation', is => 'ro', default => 'http://purl.org/sipwise/ngcp-api/#rel-tests');
+
+__PACKAGE__->config(
+    action => {
+        map { $_ => {
+            ACLDetachTo => '/api/root/invalid_user',
+            AllowedRole => [qw/admin reseller/],
+            Args => 0,
+            Does => [qw(ACL CheckTrailingSlash RequireSSL)],
+            Method => $_,
+            Path => __PACKAGE__->dispatch_path,
+        } } @{ __PACKAGE__->allowed_methods }
+    },
+    action_roles => [qw(HTTPMethods)],
+);
+
+sub auto :Private {
+    my ($self, $c) = @_;
+
+    $self->set_body($c);
+    $self->log_request($c);
+}
+
+sub GET :Allow {
+    my ($self, $c) = @_;
+    {
+        my $res = "";
+        my $subscriber = $c->model('DB')->resultset('voip_subscribers')->find(45);
+        use NGCP::Panel::Utils::Subscriber;
+        for my $n (qw/12345 012345 004312345/) {
+            my $nn = NGCP::Panel::Utils::Subscriber::normalize_callee(
+                c => $c, subscriber => $subscriber, number => $n,
+            );
+            $res .= "$nn;";
+
+        }
+        $c->response->body($res);
+        return;
+    }
+    return;
+}
+
+sub end : Private {
+    my ($self, $c) = @_;
+
+    $self->log_response($c);
+}
+
+# vim: set tabstop=4 expandtab:
diff --git a/lib/NGCP/Panel/Utils/Subscriber.pm b/lib/NGCP/Panel/Utils/Subscriber.pm
index c94db4be82..c456affe96 100644
--- a/lib/NGCP/Panel/Utils/Subscriber.pm
+++ b/lib/NGCP/Panel/Utils/Subscriber.pm
@@ -809,6 +809,78 @@ sub prepare_alias_select {
     $params->{alias_select} = encode_json(\@alias_options);
 }
 
+sub normalize_callee {
+    my (%params) = @_;
+
+    my $c = $params{c};
+    my $subscriber = $params{subscriber};
+    my $callee = $params{number};
+
+    my $rwr_rs = NGCP::Panel::Utils::Preferences::get_usr_preference_rs(
+        c => $c, attribute => 'rewrite_callee_in_dpid', 
+        prov_subscriber => $subscriber->provisioning_voip_subscriber,
+    );
+    unless($rwr_rs->count) {
+        $rwr_rs = NGCP::Panel::Utils::Preferences::get_dom_preference_rs(
+            c => $c, attribute => 'rewrite_callee_in_dpid', 
+            prov_domain => $subscriber->provisioning_voip_subscriber->domain,
+        );
+    }
+    unless($rwr_rs->count) {
+        return $callee;
+    }
+
+    my $rule_rs = $c->model('DB')->resultset('voip_rewrite_rules')->search({
+        'ruleset.callee_in_dpid' => $rwr_rs->first->value,
+        direction => 'in',
+        field => 'callee',
+    }, {
+        join => 'ruleset',
+        order_by => { -asc => 'priority' }
+    });
+    my $cache = {};
+    foreach my $r($rule_rs->all) {
+        my $match = $r->match_pattern;
+        my $replace = $r->replace_pattern;
+
+        print ">>>>>>>>>>> match=$match, replace=$replace\n";
+        for my $field($match, $replace) {
+            print ">>>>>>>>>>> normalizing $field\n";
+            my @avps = ();
+            @avps = ($field =~ /\$avp\(s:caller_([^\)]+)\)/g);
+            use Data::Printer; p @avps;
+            for my $avp(@avps) {
+                print ">>>>>>>>>> checking avp $avp\n";
+                if(!exists $cache->{$avp}) {
+                    my $pref_rs = NGCP::Panel::Utils::Preferences::get_usr_preference_rs(
+                        c => $c, attribute => $avp,
+                        prov_subscriber => $subscriber->provisioning_voip_subscriber,
+                    );
+                    unless($pref_rs->count) {
+                        $pref_rs = NGCP::Panel::Utils::Preferences::get_dom_preference_rs(
+                            c => $c, attribute => $avp,
+                            prov_domain => $subscriber->provisioning_voip_subscriber->domain,
+                        );
+                    }
+                    next unless($pref_rs->count);
+                    $cache->{$avp} = $pref_rs->first->value;
+                }
+                my $val = $cache->{$avp};
+                $field =~ s/\$avp\(s:caller_$avp\)/$val/g;
+                print ">>>>>>>>>>> normalized $field\n";
+            }
+        }
+        $replace =~ s/\\(\d{1})/\$$1/g;
+
+        print ">>>>>>>>>>> final match=$match, replace=$replace, applying to $callee\n";
+        $callee =~ s/$match/$replace/eeg;
+        print ">>>>>>>>>>> done, match=$match, replace=$replace, callee is $callee\n";
+
+    }
+
+    return $callee;
+}
+
 1;
 
 =head1 NAME