Netgear UTM25S Reference Manual 3.0.1-124 - Page 582
Wireless Network Module for the UTM9S and UTM25S, ProSecure Unified Threat Management UTM Appliance
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ProSecure Unified Threat Management (UTM) Appliance Table 149. Radio Settings screen settings (continued) Field Mode Descriptions The wireless modes that you can select depend on the radio's operating frequency that you select. 2.4 GHz Specify the wireless mode in the 2.4-GHz band by making a selection from the drop-down list: • g and b. This is the default setting. In addition to 802.11b- and 802.11g-compliant devices, 802.11n-compliant devices can connect to the wireless access point because they are backward compatible. • g only. 802.11g- and 802.11n-compliant devices can connect to the wireless access point, but 802.11n-compliant devices function below their capacity in 802.11g mode. 802.11b-compliant devices cannot connect. • ng. 802.11g- and 802.11n-compliant devices can connect to the wireless access point. 802.11b-compliant devices cannot connect. • GreenField. Only 802.11n-compliant devices can connect to the wireless access point, and 802.1b- and 802.11g-compliant devices cannot recognize the wireless access point, which might cause interference. Therefore, use Greenfield mode only when you are sure that there are no or very few 802.1b- and 802.11g-compliant devices in the wireless coverage area. 5 GHz Specify the wireless mode in the 5-GHz band by making a selection from the drop-down list: • a only. 802.11a- and 802.11n-compliant devices can connect to the wireless access point, but 802.11n-compliant devices function below their capacity in 802.11a mode. • na. This is the default setting. 802.11a- and 802.11n-compliant devices can connect to the wireless access point. • GreenField. Only 802.11n-compliant devices can connect to the wireless access point, and 802.1a -compliant devices cannot recognize the wireless access point, which might cause interference. Therefore, use Greenfield mode only when you are sure that there are no or very few 802.1a-compliant devices in the wireless coverage area. Channel Spacing Note: na, ng, and Greenfield modes only. This is a fixed field for a, b, and g modes. For the na, ng, and Greenfield modes only, specify the channel spacing by making a selection from the drop-down list: • 20/40MHz. Select this option to improve the performance. Some legacy devices (that is, devices that function only in a, b, or g mode) can operate only in 20 MHz. • 20MHz. Select this option if your network includes legacy devices. This is the default setting. Note: The channel spacing is fixed at 20 MHz for the a, b, and g modes. Current Channel This is a nonconfigurable field that shows the current channel if you have selected Auto from the Channel drop-down list. Wireless Network Module for the UTM9S and UTM25S 582