Cox Business 3848 Bedienungsanleitung
Cox Business Internet Gateway 3848
User Guide
©2020 by Cox Communications, Inc.
All rights reserved. No part of this document may be reproduced or transmitted in any form or by any means,
electronic, mechanical, photocopying, recording, or otherwise, without prior written permission of Cox
Communications.
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Table of Contents
i
Table of Contents
Overview of the 3848 Wireless Gateway ................................................................................ 1
Front Panel Description .........................................................................................................2
Back Panel.............................................................................................................................................................3
Top Panel Description............................................................................................................4
Installing the DOCSIS 3.0 3848 Gateway ................................................................................ 5
Install the Wireless Gateway..................................................................................................5
Connect Devices to the Wireless Gateway.........................................................................................................5
Connect the Wireless Gateway............................................................................................................................6
Operation of Front Panel Indicators ......................................................................................7
Initial Power On, Calibration, and Registration (AC Power applied) ...................................7
Normal Operations (AC Power Applied) ...............................................................................8
Special Conditions .................................................................................................................9
Web Access.............................................................................................................................10
Login......................................................................................................................................10
LAN Provisioning....................................................................................................................11
User Settings for LAN ..........................................................................................................11
DDNS Feature .......................................................................................................................13
WLAN Provisioning.................................................................................................................14
WiFi Protected Setup............................................................................................................14
User Provisioning for Basic Setup ........................................................................................15
WPS .......................................................................................................................................15
Radio Settings ......................................................................................................................16
Scan Button......................................................................................................................................................... 18
WiFi Disabled View .............................................................................................................................................18
Guest Network.........................................................................................................................19
User Provisioning for Guest Network .................................................................................19
Terms of Use.........................................................................................................................21
Advanced Wireless Settings / Provisioning..........................................................................22
User Provisioning for Advanced Wireless Settings ...........................................................22
WiFi - QoS Settings.................................................................................................................24
User Provisioning for QoS ...................................................................................................24
Table of Contents
ii
Wireless Security Settings .....................................................................................................25
User Provisioning for Wireless Security.............................................................................25
Wireless Security Modes......................................................................................................26
WAN Provisioning...................................................................................................................30
User Provisioning for WAN..................................................................................................30
Provisioning WAN IP through DHCP.................................................................................................................30
Provisioning with Static IP .................................................................................................................................32
MTU Size Feature ................................................................................................................................................33
Bridge Mode Provisioning......................................................................................................35
User Provisioning for Bridge Mode.....................................................................................35
Mixed Mode Provisioning .......................................................................................................36
Email Alert Provisioning.........................................................................................................37
User Provisioning for Email Alert........................................................................................37
Administration, Diagnostic, Maintenance Tools...................................................................39
Backup and Restore .............................................................................................................39
User Provisioning for Backup and Restore......................................................................................................39
Configure Gateway Settings in Cox Business MyAccount .............................................................................40
Defaulting to Factory Settings .............................................................................................44
User Provisioning ...............................................................................................................................................44
Restarting the Device ...........................................................................................................45
User Provisioning ...............................................................................................................................................45
Status Pages .........................................................................................................................45
Gateway Status ...................................................................................................................................................45
Internet Connection ............................................................................................................................................45
Local Network Status .........................................................................................................................................45
Wireless Status ...................................................................................................................................................45
DOCSIS WAN.......................................................................................................................................................45
Channel Selection...............................................................................................................................................45
Security....................................................................................................................................47
Firewall Basic Settings.........................................................................................................48
User Provisioning ...............................................................................................................................................48
VPN Passthrough Settings ..................................................................................................51
User Provisioning ...............................................................................................................................................51
VPN Tunnel Settings ............................................................................................................52
Table of Contents
iii
User Provisioning ...............................................................................................................................................52
Network Control and Advanced Security ..............................................................................57
User Provisioning Advanced Security ................................................................................57
IP Filtering ...........................................................................................................................................................57
MAC Filtering.......................................................................................................................................................57
Managed Devices................................................................................................................................................58
Port Filtering........................................................................................................................................................59
NAT Features ........................................................................................................................59
Port Range Forwarding ......................................................................................................................................59
Port Forwarding Example...................................................................................................................................60
Port Range Triggering ........................................................................................................................................62
DMZ Hosting Feature..........................................................................................................................................63
Network/Parental Control .......................................................................................................64
Basic Rules ...........................................................................................................................64
Parental Control Functions..................................................................................................65
Parental Control Log ..........................................................................................................................................66
Status Pages .........................................................................................................................66
Log Pages .............................................................................................................................66
Troubleshooting the DOCSIS 3.0 3848 Gateway...................................................................67
Frequently Asked Questions ...............................................................................................67
How Do I Configure TCP/IP Protocol?...............................................................................................................67
How Do I Renew the IP Address on My PC?.....................................................................................................69
Common Troubleshooting Issues .......................................................................................70
Tips for Improved Performance...........................................................................................71
Support....................................................................................................................................72
Remote Support: In Scope...................................................................................................72
Remote Support: Out of Scope............................................................................................72
Contact Us.............................................................................................................................72
Overview of the 3848 Wireless Gateway
Cox Business Internet Gateway 3848 User Guide 1
Overview of the 3848 Wireless Gateway
The Technicolor Model DPC3848VE DOCSIS 3.0 Wireless Gateway is a high-performance
Gateway that combines a cable modem, router, and wireless access point in a single device.
This guide provides instructions and recommendations for placing, installing, configuring,
operating, maintaining, and troubleshooting the 3848 Gateway.
The software’s Graphical User Interface (GUI) gives you access to settings that were configured
at the factory or by Cox Business for the most common installation configurations. After you
access the GUI, you can customize these settings for your business needs.
Important: If you are not familiar with the network configuration
procedures described in this guide, contact your IT professional before
you change any settings. Cox is not responsible for customer impacting
network or security issues.
Gateway equipment remains property of Cox and must be returned upon service termination to avoid additional charges. Coverage
area and signal strength vary and may be affected by building construction, topography, layout, and other factors. Maximum
simultaneous user limitations may apply for optimal performance. Speeds not guaranteed. “Cox” may not be used in customer SSID
naming convention. Services not available in all areas. Cox cannot guarantee your network’s security against all forms of
unauthorized network access. Other restrictions apply. For additional details, visit www.coxbusiness.com
Overview of the 3848 Wireless Gateway
Cox Business Internet Gateway 3848 User Guide 2
Front Panel Description
The front panel of your Gateway provides LED status indicators that indicate how well—and at
what state—your Gateway is operating.
Figure 1. Front Panel of DPC3848VE
POWER—ON: power is applied to the Gateway
DS—ON: the Gateway is receiving data from the cable network
US—ON: the Gateway is sending data to the cable network
ONLINE—ON: the Gateway is registered on the network and fully operational
WIFI 2.4G—ON: the wireless access point is operational. Blinking indicates that data is
being transferred over the wireless connection. OFF indicates that the wireless access
point is not enabled
WIFI 5G—ON: the wireless access point is operational. Blinking indicates that data is
being transferred over the wireless connection. OFF indicates that the wireless access
point is not enabled
WPS—OFF (normal condition): indicates that the wireless setup is not active. Blinking
indicates the user has activated wireless setup to add new WPS clients on the wireless
network
Overview of the 3848 Wireless Gateway
Cox Business Internet Gateway 3848 User Guide 3
Back Panel
The following illustration identifies the back panel components on the Gateway. Descriptions for
each component follow the illustration.
Figure 2. Back Panel of DPC3848VE
Important: Do not connect your PC to both the Ethernet and USB ports at the
same time. Your Gateway will not function properly if both the Ethernet and USB
ports are connected to your PC at the same time.
USB (Optional for some models)—Connects to selected devices. For models
that support USB, the default is one USB port.
ETHERNET—Four RJ-45 Ethernet ports connect to the Ethernet port on your
PC or your network.
RESET—A momentary pressing (1-2 seconds) of this button performs a
software reset the device. Pressing and holding the button for more than ten
seconds first causes a reset-to-factory-default of all settings and then performs a
software reset of the device.
Caution: The RESET
button is for maintenance purposes only. I
click it, you may lose any settings you have selected. We recomm
that you contact Cox Technical Support for assistance.
Overview of the 3848 Wireless Gateway
Cox Business Internet Gateway 3848 User Guide 4
WIFI ON/OFF—This button may be administratively disabled by Cox Business.
When this button is enabled, momentarily pressing this switch once for 1 to 2
seconds will turn off the 2.4G transmitter when both Wi-Fi transmitters are on.
Momentarily pressing it a second time turns off the 5G transmitter. Momentarily
pressing it a third time turns on both the 2.4G and 5G transmitters.
CABLE—F-connector links to an active cable signal from the Cox Technical
team.
DC IN—Connects the Gateway to the external power supply.
Top Panel Description
The WPS button on the top panel of the Gateway shows the status of the Wireless Protected
Setup (WPS) and Page features.
Figure 3. Top Panel of DPC3848VE
WIRELESS SETUP Button—Press this button to activate the Wireless Setup
feature. This feature allows users to add new Wireless Protected Setup (WPS)
compliant wireless clients to the network.
Installing the DOCSIS 3.0 3848 Gateway
Cox Business Internet Gateway 3848 User Guide 5
Installing the DOCSIS 3.0 3848 Gateway
This chapter describes how to properly install the Gateway and connect the Gateway to a
computer and other devices.
Install the Wireless Gateway
This section describes how to connect your Gateway to support the services that the Gateway
offers.
Connect Devices to the Wireless Gateway
The following illustration shows all of the possible connections that can be made to your
Gateway for various services. Although your model may not support all the services pictured,
you can determine which services your model supports by referring to the list.
Note: Professional installation may be available. Contact your local
service provider for further assistance. Device image varies according
to model.
Figure 4. Devices Connected to the Wireless Gateway (sample)
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