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| Chapter 6 Wireless LAN |
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| Table 13 Wireless LAN > Wireless Settings: MBSSID (continued) | |
| LABEL | DESCRIPTION |
| Preamble Type | Select Dynamic to have the AP automatically use short preamble when wireless adapters |
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| support it, otherwise the AP uses long preamble. |
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| Select Long if you are unsure what preamble mode the wireless adapters support, and to |
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| 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. |
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| Setting this attribute to be larger than the maximum MSDU (MAC service data unit) size |
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| turns off the RTS/CTS handshake. Setting this attribute to its smallest value (1) turns on |
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| 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 802.11 b/g/n is selected as the Wireless Mode. | |
| Aggregation | Select to enable |
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| Message Protocol Data Unit (MPDU) aggregation collects Ethernet frames along with their |
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| 802.11n headers and wraps them in a 802.11n MAC header. This method is useful for |
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| increasing bandwidth throughput in environments that are prone to high error rates. |
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| Short GI | This field is available only when 802.11 b/g/n is selected as the Wireless Mode. Select |
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| Enabled to use Short GI (Guard Interval). The guard interval is the gap introduced |
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| between data transmission from users in order to reduce interference. Reducing the GI |
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| increases data transfer rates but also increases interference. Increasing the GI reduces |
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| data transfer rates but also reduces interference. |
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| MCS Rate | The MCS Rate table is available only when 802.11 b/g/n is selected in the Wireless |
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| Mode field. |
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| IEEE 802.11n supports many different data rates which are called MCS rates. MCS stands |
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| for Modulation and Coding Scheme. This is an 802.11n feature that increases the wireless |
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| network performance in terms of throughput. |
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| For each MCS Rate |
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| rate. |
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| Clear the Enabled check box if you do not want the |
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| Turn on the Auto option to have the |
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| optimize the throughput. |
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| Note: You can set the |
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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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| 71 |
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