diff --git a/devapp/base_intr.py b/devapp/base_intr.py
index 715dcc9..b5576fb 100644
--- a/devapp/base_intr.py
+++ b/devapp/base_intr.py
@@ -1,8 +1,11 @@
-# -*- coding: utf-8 -*-
 from abc import ABCMeta, abstractmethod
 from easysnmp import Session
 
 
+class DeviceImplementationError(Exception):
+    pass
+
+
 class DevBase(object, metaclass=ABCMeta):
 
     def __init__(self, dev_instance=None):
@@ -10,19 +13,19 @@ class DevBase(object, metaclass=ABCMeta):
 
     @staticmethod
     def description():
-        """Возвращает текстовое описание"""
+        pass
 
     @abstractmethod
     def reboot(self):
-        """Перезагружает устройство"""
+        pass
 
     @abstractmethod
     def get_ports(self):
-        """Получаем инфу о портах"""
+        pass
 
     @abstractmethod
     def get_device_name(self):
-        """Получаем имя устройства по snmp"""
+        """Return device name by snmp"""
 
     @abstractmethod
     def uptime(self):
@@ -30,17 +33,17 @@ class DevBase(object, metaclass=ABCMeta):
 
     @abstractmethod
     def get_template_name(self):
-        """Получаем путь к html шаблону отображения устройства"""
+        """Return path to html template for device"""
 
     @staticmethod
     @abstractmethod
     def has_attachable_to_subscriber():
-        """Можно-ли подключать устройство к абоненту"""
+        """Can connect device to subscriber"""
 
     @staticmethod
     @abstractmethod
     def is_use_device_port():
-        """True если при авторизации по opt82 используется порт"""
+        """True if used device port while opt82 authorization"""
 
 
 class BasePort(object, metaclass=ABCMeta):
diff --git a/devapp/dev_types.py b/devapp/dev_types.py
index 5db0309..244ebd8 100644
--- a/devapp/dev_types.py
+++ b/devapp/dev_types.py
@@ -3,7 +3,7 @@ from django.utils.translation import gettext_lazy as _
 from mydefs import RuTimedelta, safe_int
 from datetime import timedelta
 from easysnmp import EasySNMPTimeoutError
-from .base_intr import DevBase, SNMPBaseWorker, BasePort
+from .base_intr import DevBase, SNMPBaseWorker, BasePort, DeviceImplementationError
 
 
 class DLinkPort(BasePort):
@@ -41,21 +41,25 @@ class DLinkDevice(DevBase, SNMPBaseWorker):
         return self.get_item('.1.3.6.1.4.1.2021.8.1.101.1')
 
     def get_ports(self):
+        interfaces_count = safe_int(self.get_item('.1.3.6.1.2.1.2.1.0'))
         nams = list(self.get_list('.1.3.6.1.4.1.171.10.134.2.1.1.100.2.1.3'))
         stats = list(self.get_list('.1.3.6.1.2.1.2.2.1.7'))
         macs = list(self.get_list('.1.3.6.1.2.1.2.2.1.6'))
-        speeds = self.get_list('.1.3.6.1.2.1.31.1.1.1.15')
+        speeds = list(self.get_list('.1.3.6.1.2.1.2.2.1.5'))
         res = []
-        for n, speed in enumerate(speeds):
-            status = True if int(stats[n]) == 1 else False
-            res.append(DLinkPort(
-                n+1,
-                nams[n] if len(nams) > 0 else _('does not fetch the name'),
-                status,
-                macs[n] if len(macs) > 0 else _('does not fetch the mac'),
-                int(speed or 0),
-            self))
-        return res
+        try:
+            for n in range(interfaces_count):
+                status = True if int(stats[n]) == 1 else False
+                res.append(DLinkPort(
+                    n+1,
+                    nams[n] if len(nams) > 0 else _('does not fetch the name'),
+                    status,
+                    macs[n] if len(macs) > 0 else _('does not fetch the mac'),
+                    int(speeds[n]) if len(speeds) > 0 else 0,
+                self))
+            return res
+        except IndexError:
+            raise DeviceImplementationError('Dlink port index error')
 
     def get_device_name(self):
         return self.get_item('.1.3.6.1.2.1.1.1.0')
diff --git a/devapp/templates/devapp/custom_dev_page/ports.html b/devapp/templates/devapp/custom_dev_page/ports.html
index 1651200..57bd85d 100644
--- a/devapp/templates/devapp/custom_dev_page/ports.html
+++ b/devapp/templates/devapp/custom_dev_page/ports.html
@@ -18,16 +18,16 @@
 
                     {% for port in ports %}
                         {% if port.st %}
-                            {% if port.sp == 10 %}
+                            {% if port.sp == 10000000 %}
                                 <div class="port kilo text-center">
                                     <b>10 mbps</b>
-                            {% elif port.sp == 100 %}
+                            {% elif port.sp == 100000000 %}
                                 <div class="port mega text-center">
                                     <b>100 mbps</b>
-                            {% elif port.sp == 1000 %}
+                            {% elif port.sp == 1000000000 %}
                                 <div class="port giga text-center">
                                     <b>1 gbps</b>
-                            {% elif port.sp == 10000 %}
+                            {% elif port.sp == 10000000000 %}
                                 <div class="port ten text-center">
                                     <b>10 gbps</b>
                             {% else %}
diff --git a/devapp/views.py b/devapp/views.py
index f932d9d..9abc4bc 100644
--- a/devapp/views.py
+++ b/devapp/views.py
@@ -13,6 +13,7 @@ from django.utils.translation import gettext_lazy as _, gettext
 from easysnmp import EasySNMPTimeoutError, EasySNMPError
 from django.views.generic import ListView, DetailView
 
+from devapp.base_intr import DeviceImplementationError
 from mydefs import res_success, res_error, only_admins, ping, ip_addr_regex
 from abonapp.models import AbonGroup, Abon
 from django.conf import settings
@@ -371,7 +372,7 @@ def devview(request, device_id):
         })
     except EasySNMPError:
         messages.error(request, _('SNMP error on device'))
-    except DeviceDBException as e:
+    except (DeviceDBException, DeviceImplementationError) as e:
         messages.error(request, e)
     return render(request, 'devapp/custom_dev_page/' + template_name, {
         'dev': dev