SMC Networks SMCD3GN3 Administrator User Manual page 98

Table 23. Wireless Advanced Settings Options
Option
BG Protection Mode This mode is a protection mechanism that prevents collisions among 802.11b/g modes. Choices are:
Auto = BG protection mode goes on or off automatically as needed.
•
• Always-On = BG protection mode is always on.
Always-Off = BG protection mode is always off. (default)
•
IGMP Snooping Enables or disables the Gateway from forwarding multicast traffic intelligently.
Enable = Gateway listens to IGMP membership reports, queries, and leave messages to identify the
•
Gateway ports that are members of multicast groups. Multicast traffic will only be forwarded to ports
identified as members of the specific multicast group or groups.
• Disable = Gateway does not analyze all IGMP packets. (default)
WMM Configuration Displays a screen for selecting WMM settings for your wireless access point(s).
Operating Mode Lets you select between Mixed Mode and Green Field.
• Mixed Mode = provides backward compatibility with IEEE 802.11n/a/g/b devices. (default)
Green Field = used for pure network of 802.11n access points and clients, taking full advantage of the
•
high-throughput capabilities of the 11n MIMO architecture
Channel BandWidth Select a channel bandwidth of 20 or 20/40.
20 = allows only single-channel operation (e.g., 20 MHz).
•
20/40 = allows both single channel operation (20 MHz) and the wider bandwidth operation (40 MHz) by
•
using two or more adjacent (contiguous channels). A 20/40 BSS is a wireless network that allows a
wider bandwidth operation mode. (default)
Guard Interval The guard interval is the period in nanoseconds that the Gateway listens between packets. Choices are:
• Long = 800 ns guard interval.
Short = 400 ns guard interval (default)
•
MCS Modulation Coding Scheme (MCS) is a specification of PHY parameters consisting of modulation order
(BPSK, QPSK, 16-QAM, 64-QAM) and FEC code rate (1/2, 2/3, 3/4, 5/6). MCS is used in the Gateway to
define 32 symmetrical settings. MCS provides for potentially greater throughput. High throughput data
rates are a function of MCS, bandwidth, and guard interval. Default is auto.
Extension Channel Defines a second 20-MHz channel. 40-MHz stations can use this channel in addition to using the control
channel simultaneously.
Aggregation Enables or disables aggregation of multiple MSDUs in one MPDU. Default is disable.
MSDU(A_MSDU)
SMCD3GN2 Wireless Cable Modem Gateway Administrator Manual
錯誤! 尚未定義樣式。
Description
HT Physical Mode
98