If you are looking for a SIP client for blackberry than unfortunately you are out of luck, No SIP or VoIP Client for Blackberry exists to date
Although things like Google Talk work on a blackberry but those are not true ‘sip clients’ since they are tied to the network of respective software vendor, Having a SIP client on you blackberry would allow you to configure any voip provider of your own choice on your handset and you can even connect it with a local asterisk PBX and make free calls between places where you have these PBX placed, all this can save you a lot of money over long distance calls
Perhaps this is the reason that RIM has not yet allowed developers access to the necessary API and documentation for the development for a Blackberry SIP solution
Fan is there in the laptop to cool the system and manage heat generated by CPU, however sometimes the noise from laptop fan becomes so loud that it starts to annoy you.
If your hp laptop fan is making loud noise than please get your laptop cleaned, the dust which accumulates in the laptop fan hinders its operation, consequently leading to generation of fan noise, take your laptop to a repairman and get the inside cleaned away by a air blower. Dust is the most common reason which causes laptop fans to generate excessive noise.
Dust also hinders the air flow within the laptop and consequently the fan has to do more work to keep the temperature down and keeps on running for large periods of time.
Also make sure to check the BIOS settings, there is an option to always run the fan when laptop is on AC power, please ensure that this is disabled. Otherwise your fan will never stop while you are on AC power
There are many ways by which you can install fonts in Linux
If you are using Gnome than you can just copy the font files to the default font location which can be accessed by going to fonts:/// via Nautilus (the file browser for GNOME)
Another way to install linux fonts is to customize the Font Search Path using xset
do this from terminal
$ xset fp+ <path of font directory></path>
$ xset fp rehash
The 1st line add a directory (which should contain your required font) to the end font search path and the rehash does a reload of the font data
Remeber that the directory you specify in path of font search must be defined as a font directory, you can do this by issuing the mkfontdir command at the directory, this will generate the required fonts.dir file in designated font directory
You can also define the fontpath in X server config file
/etc/X11/XF86Config file (or XF86Config-4 ) in Section “Files” add the line
FontPath “”
remember all of the above methods require the restart for X server (ctrl+alt+backspace)
I was looking for a tool or software that would convert PowerPoint slides to video as I wanted to upload some power point presentations to youtube
As quick search on Google led me to authorSTREAM , there were a couple of blogs claiming that authorSTREAM allowed you to download the video version of presentation after uploading
I uploaded my power point presentation at authorSTREAM but was disappointed when I saw that they don’t allow any free PowerPoint to video conversion , authorSTREAM watermarks your video with their ugly logo if you want covert video for free.
After again looking a bit for a real free PowerPoint to video conversion tool I stumbled upon a nifty little application which was of course free and did the required video conversion job
E.M. Free PowerPoint Video Converter
http://www.effectmatrix.com/PowerPoint-Video-Converter/Free-PowerPoint-Video-Converter.htm
It not only supported all versions of PowerPoint including 2007 but also had lots of other options like AVI, WMV, MPG, BMP, MP3 output formats with differece quality, ability to add or remove sound in created video
autorun.inf a simple text file which tells Windows that what application or program it needs to start automatically
This is specially used in removable USB disks and CD/DVD disks, so that the removable disks are able to automatically load the desired program
autorun.inf viruses generates a autorun.inf files in every disk of the system and whenever you open the disk it tries to execute the virus , They usually spread from external USB thumb drives
How to delete autorun.inf
To delete autorun.inf you need to reboot your PC to Safe Mode Command Prompt Only
When the DOS prompt appears , change to the root of the Disk drive
e.g for C drive you should do
c:
next step is to un-hide the autorun.inf file
execute the command
ATTRIB -H -R -S AUTORUN.INF
Finally delete it by the command
DEL AUTORUN.INF
So now you have deleted autorun.inf from C drive, do the same for other disk partitions in you PC
If you want to delete autorun.inf from a removeable or USB drive than you don’t need to boot into the safe mode, you can execute the above commands directly from CMD prompt or it would be even better if you just format the USB and get it cleared from all menaces
There are three common ways of transferring DTMF in SIP Or VoIP
1) SIP INFO Messages
This is the out of band method (out of band means that the DTMF messages are not carried within the media stream i.e. the RTP and carried separately
Its format is very simple, just in the body of INFO message the pressed DTMF digit is mentioned along with a duration for the DTMF signal
2) In Band DTMF transfer
As the name says, in this method the DTMF tones are carried in the media stream or RTP codec. This is a very crude method, DTMF is carried just a normal voice and we have no control over the DTMF , we can’t see it or decode it using wireshark or any other protocol analyzer
The optimized voice codecs like G729, GSM and G723 which used limited bandwidth face lot of problem in transferring in band DTMF
Due to limited bandwidth DTMF signals do not properly get transferred and receiving party is not able to decode them
To overcome this problem the 3rd method was devised
3) DTMF in RFC 2833
Via RFC2833 basically defined a new payload which has been created specially for carrying DTMF tones
So that DTMF is not dependent on the codec which has been made for voice but has its own optimized codec
Support for RFc 2833 is shown by the SDP rtpmap telephone-event
You can use VoIP to make phone calls using any of the below methods
1) You can use an analog telephone adaptor (ATA) to place a call. The ATA allows one to connect a standard phone to the computer through an Internet connection for use with VoIP.
2) VoIP calls can also be placed using an IP phone. These special phones resemble normal telephones, but instead of the normal RJ-11 phone connectors, they have the RJ-45 Ethernet phone connector. The IP phone connects directly to the router and includes all the necessary software and hardware to place a VoIP call directly.
3) A PC-to-PC VoIP call can also be placed using two computers, a microphone and a sound card. These calls are very cheap and usually free, like you can use skype for free skype to skype calling from PC.
For all of the above you will need an account from a VoIP service provider like Skype
.tar.bz2 Are files that have been bzipped using the bzip utility, bzip is also a data compression program just like gzip , although it is more efficient but not widely used, bzip2 is the newer version built upon bzip
If you encounter a bzip files then you can easily untar or extract it using following command
tar -xvjf filename
or you can break it in two steps
1st unzip (or unbzip)
bunzip2 filename.tar.bz2
now untar like the normal way
tar -xf filename.tar
If a directory has a large number of files on your Linux, UNIX or Solaris system and you are puzzled about their count then it is very easy
Just do
Read the rest of this entry
If your hard drive is acting up, PC hanging, read errors, slow access times, unable to find boot disk messages then it might be the right time that you do a scan of your drive with a bad sector checking software
You can also use the Windows disk check to scan for errors and bad sectors on next reboot but it is very slow and you will have to wait a lot to complete and it will not give you any details about the bad sectors and will just quickly pass from the scan menu
As two of my disks (SEGATE and Western Digital) had developed bad sectors so I was on the look for a good software which will be useful to diagnose the disk. A bit of searching led me to http://www.hdtune.com/ HD tune. I used it to scan the disk for bad sectors.. I was able to run the scan without any kind of reboot and it gave me the exact LBA of the sectors which had problems as well as percentage of bad sectors
There is a pro and a free version, the free version does have the error scan feature so there is no need to buy it.
Enjoy this free software and keep your disks healthy