To install the Unifi controller you will need to add Ubiquiti’s and mongodDB’s repo to the sources list echo “deb http://www.ubnt.com/downloads/unifi/distros/deb/debian debian ubiquiti” >> /etc/apt/sources.list echo “deb http://downloads-distro.mongodb.org/repo/debian-sysvinit dist 10gen” >> /etc/apt/sources.list You now need to add GPG keys apt-key adv –keyserver keyserver.ubuntu.com –recv C0A52C50; apt-key adv –keyserver keyserver.ubuntu.com –recv 7F0CEB10 You can . . . → Read More: UniFi Controller Debian Wheezy guide
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Preparation and installation of OpenWrt on the router jjPlus JA76PF02 Installing from console with serial connectionYou should:
Continue reading Flash Openwrt Attitude Adjustment on jjPlus JA76PF2 Creating Mikrotik OpenVPN Server Certificates OpenVPN works with SSL certificates. You can either use http://cacert.org to issue these or use the easy-rsa scripts, that come with most OpenVPN distributions. On RouterOS, all you have to do is to upload them via ftp (ca certificate and router certificate and private key) and import them with . . . → Read More: Setup Mikrotik OpenVPN Server using CAcert with Linux Client Well after my first attempts with those little white boxes, along came the OpenWRT-Linux guru of our net to point out that most of the ways i tried to tackle problems are things of the past for OpenWRT. As a matter of fact i think that most of the problems i am trying to tackle under Linux are me own patchwork around my ignorance to some new developments or ways around things. But hey this is the deal. Attempt and right the wrongs by great collaboration and good friends. So lets say thanx to Vasilis Tsiligiannis for all the help and guidance he provided in rewriting and perfecting the script we needed. Continue reading Open-Mesh Revisited
NBPSCS(iSS) = Number of coded bits per single carrier NSD = Number of data sub-carriers NSP = Number of pilot sub-carriers (used for pilot tracking) NCBPS = Number of coded bits per OFDM symbol NDBPS = Number of data bits per OFDM symbol MCS 0 – 7 are for 1×1 MIMO (1 spacial stream), MCS 8 – 15 are 2×2 MIMO (2 spacial streams). MCS 16 – 23 are 3×3 MIMO (3 spacial streams) and MCS 24 – 31 are for 4×4 MIMO (4 spacial streams). Ο vendor are obliged to support MCS 0 – 15 depending on weather they implement 1×1 or 2×2 MIMO at 20MHz. Support for 40MHz and the rest of MCS is optional. MCS 32 is special for high noise environments and it basically does duplication of data, its BPSK with 1 spacial stream in 40MHz only and with max rate 6.7Mb/s . MCS 33 – 76 are in unequal modulation of 2 spacial streams upwards, in other words every stream has different modulation (QPSK/QAM), the 33 – 38 has 2 streams (max 108.3Mb/s @ 20MHz, 225Mb/s @ 40MHz), 39 – 52 has 3 streams (max 173,3Mb/s @20MHz, 360Mb/s @ 40MHz) and 53 – 76 has 4 streams (max 238Mb/s @ 20MHz, 495Μb/s @ 40MHz). The purpose is to have flexibility and better adaptivity to environment conditions (all this provided there is in place an advanced rate control algorithm that takes into account many different parameters). MCS 77 – 127 are reserved. Continue reading 802.11n Modulation and Coding Schemes (MCS) |
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