Gateway DPC3925 Section Field Description Dtim Interval, Fragmentation Threshold, RTS Threshold

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Configure Wireless Settings

Section	Field Description
	DTIM Interval
	The Delivery Traffic Indication Message (DTIM) indicates the interval between
	Broadcasts/Multicast transmissions. DTIM field is a countdown field informing
	clients of the next window for listening to broadcast and multicast messages. When
	the device has buffered broadcast or multicast messages for associated clients, it
	sends the next DTIM with a DTIM Interval value. Its clients hear the beacons and
	awaken to receive the broadcast and multicast messages.
	(Default: 1, Range: 1-255)

Fragmentation Threshold

The fragmentation threshold value specifies the maximum size for a packet before data is fragmented into multiple packets. If you experience a high packet error rate, you may slightly increase the Fragmentation Threshold. Setting the Fragmentation Threshold too low may result in poor network performance. Only minor reduction of the default value is recommended. In most cases, it should remain at its default value of 2346.

RTS Threshold

The RTS Threshold determines at what packet size beyond which the ready to send/clear to send (RTS/CTS) mechanism is invoked. Should you encounter inconsistent data flow, only minor reduction of the default value, 2346, is recommended. If a network packet is smaller than the preset RTS Threshold size, the RTS/CTS mechanism will not be enabled. The device sends Request to Send (RTS) frames to a particular receiving station and negotiates the sending of a data frame. After receiving an RTS, the wireless station responds with a Clear to Send (CTS) frame to acknowledge the right to begin transmission. The RTS Threshold value should remain at its default value of 2347.

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Contents Important Safety Instructions This DocumentImportant Safety Instructions Mitteilung für CATV-Techniker Aviso a los instaladores de sistemas CatvPower Source Warning Ground the ProductVerify the Power Source from the On/Off Power Light Protect the Product from LightningTelephone Equipment Notice Check Product SafetyProtect the Product When Moving It Dynamic Frequency Selection DFS Dual Band Frequencies Declaration of ConformityCanada EMI Regulation Australia Radiation Exposure StatementsCanada CE Compliance National Restrictions France Italy LatviaAntennas Benefits and Features IntroductionIntroduction Whats In the Carton? Front Panel Description Back Panel Description Back Panel Description Minimum System Requirements for Macintosh What Are the System Requirements for Internet Service?Minimum System Requirements for a PC System Requirements for an Ethernet ConnectionDo Not Have a High-Speed Internet Access Account Already Have an Existing High-Speed Internet Access Account Want to Use the Application Server for Telephone ServiceRev a How Do I Mount the Modem on a Wall? Optional Before You BeginLocation and Dimensions of the Wall-Mounting Slots Mounting the Residential Gateway on a Wall Number of Telephone Devices What Are the Requirements for Telephone Service?Telephone Wiring Requirements Telephone Device TypesConnecting and Installing Internet Devices To connect devicesRev a Rev a How Do I Configure My Docsis Residential Gateway? Logging in to the Gateway for the First TimeHow Do I Configure My Docsis Residential Gateway? Setup Quick Setup Configuring Quick Settings Wlan LAN Setup Lan SetupConfiguring Your Network Settings  Pre-assigned Dhcp IP Addresses Dhcp Connected Devices Summary Starting IP AddressSetup Ddns Disabling Ddns Factory Default Settings DdnsWi-Fi Protected Setup WPS Configure Wireless SettingsWireless Basic Settings WPS Push Button Setup Option Section Field Description Basic SettingsWi-Fi Protected Setup Configuration WPS Setup Using the Gateway PIN Option Network Mode Section Field Description Basic Settings Wireless NetworkWireless Configuration Only, B/G Mixed, B/G/N Mixed factory defaultBssid Wireless Wireless SecuritySection Field Description Wireless Network Name Ssid Broadcast SsidWEP Wireless Security Page DescriptionSection Field Description Wireless Wireless Security Mode Field DescriptionsWPA Security for Personal Networks WPA or WPA2 Personal ModesConfigure Wireless Settings Wireless MAC Filter Wireless MAC Filter Page Description MAC Address Filter List Wireless Advanced Settings Section Field Description Access Access Restriction Wireless Advanced Settings Page Description CTS Protection Mode Beacon IntervalRTS Threshold Section Field Description Dtim IntervalFragmentation Threshold WDS Wireless WDS SettingsWireless WDS Settings Page Description Disable Wireless QoSWireless QoS Page Description Enable Section Field Description No ACKSection Field Description Firewall SPI Firewall Protection Configure SecuritySecurity Firewall Block Pop-Up Windows Block IP Flood Detection checked factory defaultSection Field Description Filters Filter Proxy Block Web Page CookiesVPN Disable Pptp PassthroughSecurity VPN Passthrough IPSec PassthroughSecurity VPN Security VPN Tunnel Page Description Key Management Key Exchange Method Section Field Description RemoteFqdn Manual Section Field Description KeyAuto IKE Section Field Description Status Advanced SettingsPhase 1 Operation Mode Connected or DisconnectedView Log Access Restrictions MAC Address Filtering Control Access to the GatewayAccess Restrictions IP Address Filtering Function Keys Access Restrictions Basic Rules Remove Rule Parental Control check box and click ApplyAdd Rule Keyword ListRe-Enter Password Block Access to WebsitesSection Field Description Override the Password Access DurationAccess Restrictions Time of Day Rules Access Restrictions Time of Day Rules Page DescriptionAccess Restrictions User Setup Access Restrictions User Setup Page Description Access Restrictions Local Log Section Field Description Inactivity TimeApplications & Gaming Port Filtering Configure Applications and GamingOverview Applications and Gaming Port Filtering Page DescriptionUDP Applications & Gaming Port Range ForwardingTCP End Applications and Gaming Port Range Forward Page DescriptionSection Field Description Port Range Forwarding Start IP AddressApplications & Gaming Port Range Triggering Forwarded Range Start PortApplications & Gaming DMZ Section Field Description End PortDMZ Hosting Applications and Gaming DMZ Page DescriptionDMZ Select the desired optionManage the Gateway Administration ManagementAdministration Management Page Description WAN MTU UPnP Field Description Remote Access Remote ManagementManagement Port IgmpSmtp Mail Server Administration ReportingSection Field Description Reporting Mail Alerts Mail Address for Alert LogsView Log Administration Diagnostics Administration Backup & Restore Administration Factory Defaults Restore Factory DefaultsMAC Address CM MAC Address Monitor Gateway StatusStatus Gateway Current TimeDNS1-3 Status Local NetworkSection Field Description Internet Connection IP Address WinsEnd IP Address Status Wireless Wide Channel Status Wireless Page DescriptionNetwork Name Ssid SecurityStatus Docsis WAN Docsis WAN Page DescriptionMonitor Gateway Status Frequently Asked Questions How Do I Configure TCP/IP Protocol?How Do I Renew the IP Address on My PC? What if I dont subscribe to cable TV? How do I arrange for installation?Renewing the IP Address on Windows NT, 2000, or XP Systems How does the residential gateway connect to my computer? Common Troubleshooting IssuesDont understand the front panel status indicators Can I watch TV and surf the Internet at the same time?Tips for Improved Performance Check and CorrectFront Panel LED Status Indicator Functions Step100 Rev a Normal Operations AC Power applied Front Panel LED Status Indicators During Normal ConditionsFront Panel LED Status Indicators During Special Conditions Special ConditionsDocumentation Copyright Notice TrademarksDisclaimer Software and Firmware UseIf You Have Questions Customer ServiceFor Information Region Assistance Centers Telephone and Fax Numbers