diff --git a/hardware/devices/cisco/ces/restapi/mode/callsrt.pm b/hardware/devices/cisco/ces/restapi/mode/callsrt.pm
index 0176edd85..6c8737955 100644
--- a/hardware/devices/cisco/ces/restapi/mode/callsrt.pm
+++ b/hardware/devices/cisco/ces/restapi/mode/callsrt.pm
@@ -29,6 +29,11 @@ use Digest::MD5 qw(md5_hex);
 sub custom_traffic_calc {
     my ($self, %options) = @_;
 
+    if (!defined($options{delta_time})) {
+        $self->{error_msg} = 'Buffer creation';
+        return -1;
+    }
+
     my $total_bytes = 0;
     foreach (keys %{$options{new_datas}}) {
         if (/\Q$self->{instance}\E_.*_bytes/) {
diff --git a/hardware/devices/cisco/ces/restapi/mode/callssummary.pm b/hardware/devices/cisco/ces/restapi/mode/callssummary.pm
index 6d78955db..f55bab412 100644
--- a/hardware/devices/cisco/ces/restapi/mode/callssummary.pm
+++ b/hardware/devices/cisco/ces/restapi/mode/callssummary.pm
@@ -157,17 +157,18 @@ sub manage_selection {
     $self->{global_video_outgoing} = { loss => 0, pkts => 0, loss_prct => 0, maxjitter => 0, label => 'video outgoing' };
     $self->{global_audio_incoming} = { loss => 0, pkts => 0, loss_prct => 0, maxjitter => 0, label => 'audio incoming' };
     $self->{global_audio_outgoing} = { loss => 0, pkts => 0, loss_prct => 0, maxjitter => 0, label => 'audio outgoing' };
-    $self->{global_roomanalytics} = { peoplecount => 0 };
+    $self->{global_roomanalytics} = {};
 
     return if (!defined($result->{CallHistoryGetResult}->{Entry}));
 
     my $save_last_time = 0;
     foreach (@{$result->{CallHistoryGetResult}->{Entry}}) {
-        my $end_time = Date::Parse::str2time($_->{EndTimeUTC});
+        my $end_time_utc = ref($_->{EndTimeUTC}) eq 'HASH' ? $_->{EndTimeUTC}->{content} : $_->{EndTimeUTC};
+        my $end_time = Date::Parse::str2time($end_time_utc);
         if (!defined($end_time)) {
             $self->{output}->output_add(
                 severity => 'UNKNOWN',
-                short_msg => "can't parse date '" . $_->{EndTimeUTC} . "'"
+                short_msg => "can't parse date '" . $end_time_utc . "'"
             );
             next;
         }
@@ -177,17 +178,21 @@ sub manage_selection {
         $self->{global}->{new_calls}++;
         foreach my $type (('Video', 'Audio')) {
             foreach my $direction (('Incoming', 'Outgoing')) {
-                $self->{'global_' . lc($type) . '_' . lc($direction)}->{maxjitter}  = $_->{$type}->{$direction}->{MaxJitter}
-                    if ($self->{'global_' . lc($type) . '_' . lc($direction)}->{maxjitter} < $_->{$type}->{$direction}->{MaxJitter});
-                if ($_->{$type}->{$direction}->{PacketLoss} =~ /^(\d+)\/(\d+)/) {
+                my $max_jitter = ref($_->{$type}->{$direction}->{MaxJitter}) eq 'HASH' ? $_->{$type}->{$direction}->{MaxJitter}->{content} : $_->{$type}->{$direction}->{MaxJitter};
+                my $packet_loss = ref($_->{$type}->{$direction}->{PacketLoss}) eq 'HASH' ? $_->{$type}->{$direction}->{PacketLoss}->{content} : $_->{$type}->{$direction}->{PacketLoss};
+                $self->{'global_' . lc($type) . '_' . lc($direction)}->{maxjitter} = $max_jitter
+                    if ($self->{'global_' . lc($type) . '_' . lc($direction)}->{maxjitter} < $max_jitter);
+                if ($packet_loss =~ /^(\d+)\/(\d+)/) {
                     $self->{'global_' . lc($type) . '_' . lc($direction)}->{loss} += $1;
                     $self->{'global_' . lc($type) . '_' . lc($direction)}->{pkts} += $2;
                 }
             }
         }
-        $self->{global_roomanalytics}->{peoplecount} = $_->{RoomAnalytics}->{PeopleCount};
-        if ($_->{RoomAnalytics}->{PeopleCount} =~ /^N\/A$/) {
-            $self->{global_roomanalytics}->{peoplecount} = 0;
+        if (defined($_->{RoomAnalytics}->{PeopleCount})) {
+            $self->{global_roomanalytics}->{peoplecount} = $_->{RoomAnalytics}->{PeopleCount};
+            if ($_->{RoomAnalytics}->{PeopleCount} =~ /^N\/A$/) {
+                $self->{global_roomanalytics}->{peoplecount} = 0;
+            }
         }
     }
 
diff --git a/hardware/devices/cisco/ces/restapi/plugin.pm b/hardware/devices/cisco/ces/restapi/plugin.pm
index 6ad3cd935..37a03baf8 100644
--- a/hardware/devices/cisco/ces/restapi/plugin.pm
+++ b/hardware/devices/cisco/ces/restapi/plugin.pm
@@ -31,7 +31,7 @@ sub new {
     bless $self, $class;
 
     $self->{version} = '1.0';
-    $self->{modes}} = {
+    $self->{modes} = {
         'components'    => 'hardware::devices::cisco::ces::restapi::mode::components',
         'calls-summary' => 'hardware::devices::cisco::ces::restapi::mode::callssummary',
         'calls-rt'      => 'hardware::devices::cisco::ces::restapi::mode::callsrt',