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Monthly Archives: September 2011
Asterisk H323 Trunk to Cisco call manager
Here is a step by step guide to create an H323 trunk from Asterisk to Cisco Call Manager (CCM)
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Change mysql root password using MySQL sql command
You can directly update password using the following method to update or change password for user vivek:
1) Login to mysql server, type the following command at shell prompt:
$ mysql -u root -p
Simple firewall functions in linux using iptables
Here is a simple, to the point manual on linux iptables:
Port numbers which are recognized by Internet and other network protocols, enabling the computer to interact with others.
Each Linux server has a port number (see /etc/services file). For example:
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How to tackle Jitter issue
In an environment with old LAN cabling, chances are so high that call get interrupted, words drop every now and then, and at the worst case, the sound quality gets terribly unbearable. This is mainly caused by the issue commonly referred to as Jitter.
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How to check if digium EC module (VPM) is properly installed
After the DAHDI drivers have been loaded execute the following command on the Linux shell to check if the VPMADT032 is installed and operational.
dmesg| grep VPMADT032
Fighting Echo on POTS lines
Using fxotune will help echo canceller to work better.
Do this before setting up echo canceller, it means to disable echo canceller options in /etc/dahdi/system.conf and
/etc/asterisk/chan_dahdi.conf, and to stop asterisk but dahdi still running.
Asterisk Dialplan – Lock Virtual Extensions Remotely
Today we had a customer who wanted to use the phone unlock feature for their virtual extension which had no physical phones. Normally phone lock feature works directly from the extension physical phone. So I had to do some customisation in the asterisk dialplan. Here is the code:
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Force kill processes in ubuntu
I just had a problem with my skype that I couldn’t login due to previous instances having been closed but for a mysterious reason the process was still hanging over there. So, in short I couldn’t log into my Skype. So here is what I did to kill those processes you see below:
root@support-desktop:/home/support# ps ax | grep skype
2828 ? Sl 16:33 skype
21721 ? Sl 0:04 skype