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:
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.
After the DAHDI drivers have been loaded execute the following command on the Linux shell to check if the VPMADT032 is installed and operational.
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.
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:
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
I was just working on developing a simple Asterisk based auto-dialer. I came up with a design for the interface using JQuery Drag ‘n Drop feature.
There are occasions when we need to look for a specific word or phrase yet we need to check certain number of lines before or after that. Here is the way to do it:
Configuring SPA3102 (or SPA3000) is not very straightforward and requires alot of configurations on both the Gateway and Asterisk PBX. Follow this instruction step by step.
Note that CLID and MTMF in IVR is successfully checked with this gateway.