hey frnds do u know how can you look at system details from command line
just one command and your system info is in your plate ...
windows computers : just type cmd in run window
now on black dos prompt type systeminfo and enter
it 'll show your OS details as well as ur sytem login time,
and lots more details.....
:)
Linux Computers : if u r using FC series just use yum command first to download a tool
bye writing
yum -y install lshw
after successful installation
just type the command
lshw
ur system info is in your palm now ..
:)
to get BIOS info without re starting ur system
just use one command on command line
dmidecode --type bios
u can also get many more info to get more about dmidecode
type
man dmidecode
and enjoy
:)
Wednesday, April 29, 2009
Thursday, April 9, 2009
BlueTooth Basics
What is Bluetooth?
is a universal radio interface in the 2.4 GHz frequency band that enables electronic devices to connect and communicate wirelessly via short-range (10-100 m), ad-hoc networks.
Peak data rate : 1 Mbps
Low power : peak tx power <= 20 dBm Low cost : target is $5-10 per piece Ability to simultaneously handle both voice and dataLine of sight not required
Bluetooth History:
Invented in 1994 by L. M. Ericsson, Sweden
Named after Harald Blaatand “Bluetooth”, king of Denmark 940-981 A.D.
Bluetooth SIG founded by Ericsson, IBM, Intel, Nokia and Toshiba in Feb 1998
More than 1900 members today
Bluetooth version 1.0 and 1.1 have been released
Bluetooth Air Interface:
Piconet channel definition
Physical link definition
Packet definition
Piconets, Masters and Slaves:
In principle each unit is a peer with the same hardware capabilities
Two or more Bluetooth units that share a channel form a piconet
One of the participating units is becomes the master (by defn the unit that establishes the piconet).
Participants may change roles if a slave unit wants to take over as master
Only one master in a piconet.
Upto 7 slaves
Inter-piconet communication:
A unit may particpate in more than one piconet on a TDM basis.
To participate on a piconet it needs the master’s identity and the clock offset.
While leaving the piconet it informs the master
The master can also multiplex as slave on another piconet. But all traffic in its piconet will spended in its absence.
for more deatils read it:
www.it.iitb.ac.in/~it644/lectures/bluetooth.ppt
is a universal radio interface in the 2.4 GHz frequency band that enables electronic devices to connect and communicate wirelessly via short-range (10-100 m), ad-hoc networks.
Peak data rate : 1 Mbps
Low power : peak tx power <= 20 dBm Low cost : target is $5-10 per piece Ability to simultaneously handle both voice and dataLine of sight not required
Bluetooth History:
Invented in 1994 by L. M. Ericsson, Sweden
Named after Harald Blaatand “Bluetooth”, king of Denmark 940-981 A.D.
Bluetooth SIG founded by Ericsson, IBM, Intel, Nokia and Toshiba in Feb 1998
More than 1900 members today
Bluetooth version 1.0 and 1.1 have been released
Bluetooth Air Interface:
Piconet channel definition
Physical link definition
Packet definition
Piconets, Masters and Slaves:
In principle each unit is a peer with the same hardware capabilities
Two or more Bluetooth units that share a channel form a piconet
One of the participating units is becomes the master (by defn the unit that establishes the piconet).
Participants may change roles if a slave unit wants to take over as master
Only one master in a piconet.
Upto 7 slaves
Inter-piconet communication:
A unit may particpate in more than one piconet on a TDM basis.
To participate on a piconet it needs the master’s identity and the clock offset.
While leaving the piconet it informs the master
The master can also multiplex as slave on another piconet. But all traffic in its piconet will spended in its absence.
for more deatils read it:
www.it.iitb.ac.in/~it644/lectures/bluetooth.ppt
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