Apr 22 2008
Worried about writing asterisk dialplans.??Want to make dialplan graphically using simple drag and drop.Here is Visual Dialplan for Asterisk an innovative visual modeling platform that enables Asterisk users to create, maintain and validate Asterisk dialplans in an easy, convenient and natural way.We can make complex dialplan by simply drag and drop method.
Advantages:
To download and use Click Here
Apr 21 2008
If you dual boot with Windows and Linux, and have data in both different partitions, some time it is necessary to access windows partition data from Linux and Linux partition data from windows.
The first one is simple as we all know we can mount the windows partition dive to linux using mount command or by writing in the fstab file.
And what about the second one??? ie getting linux files from windows.??
We can do it by a tool called Explore2fs.
Explore2fs is a GUI explorer tool for accessing ext2 and ext3 filesystems. It runs under all versions of Windows and can read almost any ext2 and ext3 filesystem. Click here to download.
Apr 21 2008
Audacity is a free digital sound editing application we can import sound format like mp3, wav etc and edit and export to any other sound format.
To install audactiy in ubuntu issue
sudo apt-get install audacity
One of the issue facing with audacity application is that the export to mp3 fromat will not work in the default installation.This is due to the absence of the lame mp3 encoder.
To solve this install it as follows.
sudo apt-get install lame sudo apt-get install lame-extras sudo apt-get install lame-dev sudo apt-get install liblame0
Apr 17 2008
Nmap is a tool that can be used to check the network status as well as the status of a particular port.
To install nmap issue
sudo apt-get install nmap
eg:
To check the status of a particular port in the local host we can issue
nmap -p 80 localhost
will give
Starting Nmap 4.53 ( http://insecure.org ) at 2008-04-17 18:58 IST
Interesting ports on localhost (127.0.0.1):
PORT STATE SERVICE
80/tcp open http
if its open.Similarly we can give any host name.
For scanning a network is live or not we can give
nmap -sP -vv 192.168.0.* | grep up
Host 192.168.0.1 appears to be up.
Host 192.168.0.100 appears to be up.
Host 192.168.0.101 appears to be up.
Host 192.168.0.102 appears to be up.
Host 192.168.0.103 appears to be up.
Host 192.168.0.104 appears to be up.
Host 192.168.0.111 appears to be up.
Host 192.168.0.112 appears to be up.
Host 192.168.0.115 appears to be up.
Host 192.168.0.117 appears to be up.
Nmap done: 256 IP addresses (10 hosts up) scanned in 4.630 seconds
will give this if all are up
Apr 10 2008
Traditionally we all are using the hardware PBX for our day to day application.That is we buy a Hardware from the vendors connect to our telephone system and use it.Lots or proprietary PBX are there in the market that we can buy and install to our Telephone connection or PRI connection.
The disadvantage with these system is that it cost a lot and it will only have limited functionality. A normal people cant afford it.
Have you ever think about a PBX that can be downloaded from the web and can use for the same application that we does with a hardware PBX or much more that a hardware does normally.Nothing to wonder, a company called Degium is providing such a software.
Degium provides an open source software called Asterisk which does the same functionality of a PBX and more like.
Interesting right…..We can kick off the proprietary PBX systems and can build our own application as we needed with our Opensource PBX.
Apr 02 2008
Now we have a look of what is a PBX or (Private branch exchange)……in a laymans term we can tell PBX is a telephone exchange in a home or in a office which can have all the features of a local telephone exchange….(it can be a hardware exchange or a software exchange)……
“A Private Branch eXchange (PBX) is a telephone exchange that serves a particular business or office, as opposed to one that a common carrier or telephone company operates for many businesses or for the general public. PBXs are also referred to as:”
This is what wikipedia tells 
…..
as the normal telephone exchange do…we can make many extensions with a PBX can route our calls as the telephone exchange does…..for example 106 PBX means it will have 1 P&T conection and 6 extension….P&T(Post and Telegraphy) ..it is a connection that we get from our telephone exchange……and the extension means we have locally connected 6 extension phone with the PBX……..
Apr 02 2008
Lets starts from the very begining….
The word PBX is some thing very nice to hear and very commenly hearing one..i heard first when i was in my degree days we had a paper there called Electronic communication…when i heard this first time did’t got anything…when i came to know the expansion of it (PBX) Private Branch exchange……i got that it was some thing related to telephone exchange….someone told me that it is like an intercom….intercom..???oops..with god grace i don’t know what is it on that time….
Later i got what really is …An intercom (intercommunication device) is an electronic communications system within a building or group of buildings….it can called as phone with in a house or an office with out a external connection…(external connection means we have a group of telephone but don’t have a connection from the telephone exchange)…and our groups of phone is interconnected…in computer terms we can call it as a Local Area telephone network or a LAN
