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Chapter 6 Wireless LAN
Table 14 Wireless LAN > Wireless Settings: MBSSID (continued)
LABEL | DESCRIPTION |
Preamble Type | Select Dynamic to have the AP automatically use short preamble when wireless adapters |
| support it, otherwise the AP uses long preamble. |
| Select Long if you are unsure what preamble mode the wireless adapters support, and to |
| provide more reliable communications in busy wireless networks. |
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RTS/CTS | (Request To Send) The threshold (number of bytes) for enabling RTS/CTS handshake. |
Threshold | Data with its frame size larger than this value will perform the RTS/CTS handshake. |
| Setting this attribute to be larger than the maximum MSDU (MAC service data unit) size |
| turns off the RTS/CTS handshake. Setting this attribute to its smallest value (1) turns on |
| the RTS/CTS handshake. |
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|
Extension | You can use CTS to self or |
Channel | wireless networks or hidden wireless clients. The throughput of |
Protection Mode | than CTS to self. Using this mode may decrease your wireless performance. |
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This field is available only when 802.11n, 802.11b/g/n, 802.11a/n or 802.11a/n/ac | |
Aggregation | is selected as the Wireless Mode. |
| Select to enable |
| Message Protocol Data Unit (MPDU) aggregation collects Ethernet frames along with their |
| 802.11n headers and wraps them in a 802.11n MAC header. This method is useful for |
| increasing bandwidth throughput in environments that are prone to high error rates. |
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Short GI | This field is available only when 802.11n, 802.11b/g/n, 802.11a/n or 802.11a/n/ac |
| is selected as the Wireless Mode. |
| Select Enabled to use Short GI (Guard Interval). The guard interval is the gap |
| introduced between data transmission from users in order to reduce interference. |
| Reducing the GI increases data transfer rates but also increases interference. Increasing |
| the GI reduces data transfer rates but also reduces interference. |
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MCS Rate | The MCS Rate table is available only when 802.11n, 802.11b/g/n or 802.11a/n or |
| 802.11a/n/ac is selected in the Wireless Mode field. |
| IEEE 802.11n supports many different data rates which are called MCS rates. MCS stands |
| for Modulation and Coding Scheme. This is an 802.11n feature that increases the wireless |
| network performance in terms of throughput. |
| For each MCS Rate |
| Clear the Enabled check box if you do not want the NWA to use the data rate. |
| Turn on the Auto option to have the NWA set the data rates automatically to optimize the |
| throughput. |
| Note: You can set the NWA to use up to four MCS rates at a time. |
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Apply | Click Apply to save your changes. |
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Cancel | Click Cancel to begin configuring this screen afresh. |
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NWA1120 Series User’s Guide | |
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