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Symbol Technologies AP-4131 manual Supporting CAM and PSP Stations

Models: AP-4131

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Introduction

1.3.8Supporting CAM and PSP Stations

CAM (Continuously Aware Mode) stations leave their radios on continuously to hear every beacon and message transmitted. These systems operate without any adjustments by the AP. A beacon is a uniframe system packet broadcast by the AP to keep the network synchronized. A beacon includes the Net_ID (ESS), the AP address, the Broadcast destination addresses,

a time stamp, a DTIM (Delivery Traffic Indication Message) and the TIM (Traffic Indication Map).

PSP (Power Save Polling) stations power off their radios for short periods. When a Spectrum24 MU in PSP mode associates with an AP, it notifies the AP of its activity status. The access point responds by buffering packets received for the MU. The Spectrum24 adapters use a PSP performance index from 1 to 5, where 1 provides the quickest response time and 5 provides the most efficient power consumption.

The performance index determines how long the adapter stays in CAM after transmit or receive activity. Regardless of the performance index used, adapters switch to CAM for data reception/transmission. The awake interval in PSP performance index 1 is long enough to allow for round-trip packet response times. The packet response time in PSP performance index 5 is only 25 msec, the adapter goes back to sleep and requires another wake up period to receive data.

When the MU wakes up and sees its bit set in the TIM, it issues a short frame to the AP for the packets stored. The AP sends them to the MU and the MU issues another short frame when the data has been received and is ready to go back to PSP. A DTIM field, also called a countdown field, informs MUs of the next window for listening to broadcast and multicast messages. When the AP has buffered broadcast or multicast messages for associated MUs, it sends the next DTIM with a DTIM Interval value. To prevent a PSP-mode MU from sleeping through a DTIM notification, select a PSP mode value less than or equal to the DTIM value. PSP-mode MUs hear the beacons and awaken to receive the broadcast and multicast messages.

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AP-4131 Access Point Product Reference Guide

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Page 34
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Symbol Technologies AP-4131 manual Supporting CAM and PSP Stations
Page 33 Page 35

AP-4131 specifications

The Symbol Technologies AP-4131 is a high-performance access point designed for businesses seeking reliable wireless networking solutions. With its robust features and advanced technologies, the AP-4131 paves the way for seamless connectivity in a variety of environments, including offices, warehouses, and retail spaces.

One of the standout features of the AP-4131 is its support for dual-band operation, enabling it to efficiently transmit and receive data across both 2.4 GHz and 5 GHz frequency bands. This dual-band functionality minimizes interference and allows for optimal performance even in densely populated areas with multiple wireless devices.

The AP-4131 employs the 802.11a/b/g/n standards, offering data rates of up to 300 Mbps. This capability ensures that users experience fast and reliable wireless connectivity, whether for bandwidth-intensive applications or simple web browsing. Additionally, its MIMO (Multiple Input Multiple Output) technology significantly enhances the signal quality and overall network performance, allowing more devices to connect simultaneously without degrading performance.

In terms of security, the AP-4131 provides advanced encryption protocols, including WPA2, to safeguard data transmission and mitigate the risk of unauthorized access. This emphasis on security is vital for organizations handling sensitive information and needing to protect their networks from potential threats.

The device is also equipped with Power over Ethernet (PoE) support, simplifying installation by allowing power and data to use a single cable. This feature enables flexible placement of the access point without the need for separate power sources, making it convenient for deployment in various locations.

Moreover, the AP-4131 features built-in management capabilities, allowing IT administrators to monitor and manage network performance easily. Its centralized management system facilitates the quick configuration of access points across the organization, streamlining maintenance and troubleshooting processes.

Another notable characteristic of the AP-4131 is its rugged design, built to withstand harsh environmental conditions. This makes it suitable for outdoor deployments or areas subject to extreme temperatures and conditions.

In summary, the Symbol Technologies AP-4131 is an advanced access point that combines dual-band performance, robust security features, and flexible deployment options, making it a valuable asset for businesses aiming to enhance their wireless networking capabilities. Its combination of cutting-edge technologies and reliable performance positions it as a top choice for organizations looking to build a strong, secure, and efficient wireless infrastructure.