Friday, February 17, 2006

Proxim MP11 Ruggedized Wifi testing

Just opened a box which contains the Proxim Radios ruggedized type sent by Dataworld. I was informed that this new Proxim radio has upgraded itself to a new software revision which allows QoS features to be configured, specifically for Voice applications. I am just having trouble looking for the other laptop since it was borrowed to test an IP VPN box of Engineering. Quite a good looking radio, which comes with a 17 dbi sectoral and 18 dbi Panel Antenna. I had my first glimpse of its software and it looks ok specially the QoS flavors stuffed inside. For readers, QoS means quality of service. Basically it means, prioritization of traffic in a data network. It allows you to identify what traffic, from which traffic or from whose traffic you would like to prioritize in a data link. Usually we need this for RTP(Real Time Protocol) traffic which comprised mostly of voice or video. Voice traffic for one is a latency(delay measured in milliseconds) sensitive data, which requires that both sender and receiver synschronized for quality voice communication.So in a data link, we usually employ QoS on both ends to be sure that Voice packets are streaming with no problems.

Tried to power up both radio and access both consoles on Subscriber Unit and the Base Station, yet both cannot connect to each other. Check config and notice that both were configured to maximum 36mbps speed which has actual throughput of 20 to 24mbps. Since the antenna were just a feet away, i thought it might be affected by too much reflection signal on both walls, which produce multipath fading. Sometime those reflected signals create some kind of a negative resultant to other signals which cancels the legitimate ones transmitted in a proper angle (ok?)With 5ms latency on both SU and BS, i degraded the data rate to 1024kbps and provide values for antenna gain. Reboot and well, it is now connected....good work. Well i just have to check this QoS by doing VoIP test which requires VoIP gateways and telephone to determine voice quality.

I feel this wireless too much for me now. Just want to learn something new like Linux,Ruby or those PHP stuffs. For a 3 months now, i have been handling too many brands of radio that i hardly remember anythin on how did i configure it to run(hehehe) looks like the radiation have toasted my brain already.

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