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P-660H/HW/W-T Series User’ Guide
Appendix L
424
A large
Fragmentation Threshold
is recommended for networks not prone to interference
while you should set a smaller threshold for busy networks or networks that are prone to
interference.
If the
Fragmentation Threshold
value is smaller than the
RTS/CTS
value (see previously)
you set then the RTS (Request To Send)/CTS (Clear to Send) handshake will never occur as
data frames will be fragmented before they reach
RTS/CTS
size.
Preamble Type
A preamble is used to synchronize the transmission timing in your wireless network. There are
two preamble modes:
Long
and
Short
.
Short preamble takes less time to process and minimizes overhead, so it should be used in a
good wireless network environment when all wireless stations support it.
Select
Long
if you have a ‘noisy’ network or are unsure of what preamble mode your wireless
stations support as all IEEE 802.11b compliant wireless adapters must support long preamble.
However, not all wireless adapters support short preamble. Use long preamble if you are
unsure what preamble mode the wireless adapters support, to ensure interpretability between
the AP and the wireless stations and to provide more reliable communication in ‘noisy’
networks.
Select
Dynamic
to have the AP automatically use short preamble when all wireless stations
support it, otherwise the AP uses long preamble.
Note:
The AP and the wireless stations MUST
use the same preamble mode in order
to communicate.
IEEE 802.11g Wireless LAN
IEEE 802.11g is fully compatible with the IEEE 802.11b standard. This means an IEEE
802.11b adapter can interface directly with an IEEE 802.11g access point (and vice versa) at
11 Mbps or lower depending on range. IEEE 802.11g has several intermediate rate steps
between the maximum and minimum data rates. The IEEE 802.11g data rate and modulation
are as follows:
Table 160
IEEE 802.11g
DATA RATE (MBPS)
MODULATION
1
DBPSK (Differential Binary Phase Shift Keyed)
2
DQPSK (Differential Quadrature Phase Shift Keying)
5.5 / 11
CCK (Complementary Code Keying)
6/9/12/18/24/36/48/54
OFDM (Orthogonal Frequency Division Multiplexing)
Содержание P-660H - VERSION 3.40
Страница 1: ...P 660H HW W T Series ADSL 2 Gateway User s Guide Version 3 40 6 2005...
Страница 9: ...P 660H HW W T Series User Guide 9 Customer Support...
Страница 31: ...P 660H HW W T Series User Guide 31 List of Figures...
Страница 37: ...P 660H HW W T Series User Guide 37 List of Tables...
Страница 41: ...P 660H HW W T Series User Guide 41 Introduction to DSL...
Страница 61: ...P 660H HW W T Series User Guide 61 Chapter 3 Wizard Setup for Internet Access...
Страница 89: ...P 660H HW W T Series User Guide 89 Chapter 5 Wireless LAN...
Страница 131: ...P 660H HW W T Series User Guide 131 Chapter 10 Firewalls...
Страница 161: ...P 660H HW W T Series User Guide 161 Chapter 13 Remote Management Configuration...
Страница 175: ...P 660H HW W T Series User Guide 175 Chapter 14 Universal Plug and Play UPnP...
Страница 181: ...P 660H HW W T Series User Guide 181 Chapter 15 Logs Screens...
Страница 195: ...P 660H HW W T Series User Guide 195 Chapter 16 Media Bandwidth Management Advanced Setup...
Страница 207: ...P 660H HW W T Series User Guide 207 Chapter 17 Maintenance...
Страница 217: ...P 660H HW W T Series User Guide 217 Chapter 19 Menu 1 General Setup...
Страница 221: ...P 660H HW W T Series User Guide 221 Chapter 20 Menu 2 WAN Backup Setup...
Страница 225: ...P 660H HW W T Series User Guide 225 Chapter 21 Menu 3 LAN Setup...
Страница 229: ...P 660H HW W T Series User Guide 229 Chapter 22 Wireless LAN Setup...
Страница 235: ...P 660H HW W T Series User Guide 235 Chapter 23 Internet Access...
Страница 249: ...P 660H HW W T Series User Guide 249 Chapter 25 Static Route Setup...
Страница 253: ...P 660H HW W T Series User Guide 253 Chapter 26 Bridging Setup...
Страница 269: ...P 660H HW W T Series User Guide 269 Chapter 27 Network Address Translation NAT...
Страница 285: ...P 660H HW W T Series User Guide 285 Chapter 29 Filter Configuration...
Страница 305: ...P 660H HW W T Series User Guide 305 Chapter 32 System Information and Diagnosis...
Страница 317: ...P 660H HW W T Series User Guide 317 Chapter 33 Firmware and Configuration File Maintenance...
Страница 323: ...P 660H HW W T Series User Guide 323 Chapter 34 System Maintenance...
Страница 327: ...P 660H HW W T Series User Guide 327 Chapter 35 Remote Management...
Страница 337: ...P 660H HW W T Series User Guide 337 Chapter 36 IP Policy Routing...
Страница 341: ...P 660H HW W T Series User Guide 341 Chapter 37 Call Scheduling...
Страница 353: ...P 660H HW W T Series User Guide 353 Chapter 38 Troubleshooting Figure 232 Security Setting ActiveX Controls...
Страница 357: ...P 660H HW W T Series User Guide 357 Appendix A...
Страница 359: ...P 660H HW W T Series User Guide 359 Appendix B...
Страница 383: ...P 660H HW W T Series User Guide 383 Appendix D...
Страница 387: ...P 660H HW W T Series User Guide 387 Appendix F...
Страница 393: ...P 660H HW W T Series User Guide 393 Appendix G...
Страница 397: ...P 660H HW W T Series User Guide 397 Appendix H...
Страница 400: ...P 660H HW W T Series User Guide Appendix I 400...
Страница 401: ...P 660H HW W T Series User Guide 401 Appendix I...
Страница 455: ...P 660H HW W T Series User Guide 455 Appendix M...