User's Manual
Table Of Contents
- Terminology
- Introduction
- Installation
- Software configuration
- Prepare your PC to configure the WLAN Broadband Router
- Connect to the WLAN Broadband Router
- Management and configuration on the WLAN Broadband Router
- Status
- Setup Wizard
- Operation Mode
- Wireless - Basic Settings
- Wireless - Advanced Settings
- Wireless - Security Setup
- Wireless - Access Control
- WDS Settings
- Site Survey
- WPS
- LAN Interface Setup
- WAN Interface Setup
- Firewall - Port Filtering
- Firewall - IP Filtering
- Firewall - MAC Filtering
- Firewall - Port Forwarding
- Firewall - URL Filtering
- Firewall - DMZ
- Management - Statistics
- Management - DDNS
- Management - Time Zone Setting
- Management - Denial-of-Service
- Management - Log
- Management - Upgrade Firmware
- Management - Save/ Reload Settings
- Management - Password Setup
- FREQUENTLY ASKED QUESTIONS (FAQ)
- What and how to find my PC’s IP and MAC address?
- What is Wireless LAN?
- What are ISM bands?
- How does wireless networking work?
- What is BSSID?
- What is ESSID?
- What are potential factors that may causes interference?
- What are the Open System and Shared Key authentications?
- What is WEP?
- What is Fragment Threshold?
- What is RTS (Request To Send) Threshold?
- What is Beacon Interval?
- What is Preamble Type?
- What is SSID Broadcast?
- What is Wi-Fi Protected Access (WPA)?
- What is WPA2?
- What is 802.1x Authentication?
- What is Temporal Key Integrity Protocol (TKIP)?
- What is Advanced Encryption Standard (AES)?
- What is Inter-Access Point Protocol (IAPP)?
- What is Wireless Distribution System (WDS)?
- What is Universal Plug and Play (uPNP)?
- What is Maximum Transmission Unit (MTU) Size?
- What is Clone MAC Address?
- What is DDNS?
- What is NTP Client?
- What is VPN?
- What is IPSEC?
- What is WLAN Block Relay Between Clients?
- What is WMM?
- What is WLAN ACK TIMEOUT?
- What is Modulation Coding Scheme (MCS)?
- What is Frame Aggregation?
- What is Guard Intervals (GI)?
- Configuration examples

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5.33 What is Frame Aggregation?
Every 802.11 packet, no matter how small, has a fixed amount of overhead associated with it. Frame
Aggregation combines multiple smaller packets together to form one larger packet. The larger
packet can be sent without the overhead of the individual packets. This technique helps improve the
efficiency of the 802.11n radio allowing more end user data to be sent in a given time.
5.34 What is Guard Intervals (GI)?
A GI is a period of time between symbol transmission that allows reflections (from multipath) from
the previous data transmission to settle before transmitting a new symbol. The 802.11n draft
specifies two guard intervals: 400ns (short) and 800ns (long). Support of the 400ns GI is optional for
transmit and receive. The purpose of a guard interval is to introduce immunity to propagation delays,
echoes, and reflections to which digital data is normally very sensitive.