Cisco Systems DL-2159-05 manual Radio Modulation, Radio Preamble

Chapter 3 Radio Configuration and Basic Settings

Radio Configuration

If this access point is a repeater, type the MAC address of one or more root-unit access points with which you want this access point to associate. With MAC addresses in these fields, the repeater access point always tries to associate with the specified access points instead of with other less-efficient access points.

If the Adopt Primary Port Identity setting on the specified access point’s Radio Identification page is set to no, you should enter the radio’s MAC address as it appears on the Radio Identification page. Usually, however, the Adopt Primary Port Identity setting is set to yes, and you can enter the specified access point’s primary MAC address, which appears on the Express Setup page.

For complete instructions on setting up repeater access points, see the “Setting Up a Repeater Access Point” section on page 12-2.

Radio Modulation

Select Standard or MOK for the radio modulation the access point uses.

•Standard—This default setting is the modulation type specified in IEEE 802.11, the wireless standard published by the Institute of Electrical and Electronics Engineers (IEEE) Standards Association.

•MOK—This modulation was used before the IEEE finished the high-speed 802.11 standard and may still be in use in older wireless networks.

Note This setting does not appear on the AP Radio Advanced page for the radio module.

Radio Preamble

The radio preamble is a section of data at the head of a packet that contains information the access point and client devices need when sending and receiving packets. The pull-down menu allows you to select a long or short radio preamble:

•Long—A long preamble ensures compatibility between the access point and all early models of Cisco Aironet Wireless LAN Adapters (PC4800 and PC4800A).

•Short—A short preamble improves throughput performance. Cisco Aironet's Wireless LAN Adapter supports short preambles. Early models of Cisco Aironet's Wireless LAN Adapter (PC4800 and PC4800A) require long preambles.

Note This setting does not appear on the AP Radio Advanced page for the radio module.

Cisco Aironet 1200 Seres Access Point Software Configuration Guide

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