Today a friend of mine asked me if I have got any manual for an Asterisk HA setup, so I decided to write this post to share with everyone else.
In this manual, we are using DRBD with Heartbeat on Debian. Feel free to try it on any other linux distro (make sure to do the proper adjustments). Please don’t use the configuration samples here in any production environment, unless you have had it completely tested in your lab.
There are many occasions where you need to have some sort of communication between your Asterisk system and an external system, be it another telephony platform or external application. The beauty of Asterisk is it’s superb flexibility in terms of collaboration or integration with external phone systems or applications. One common scenario is integration to Avaya system. Here in this post I try to highlight some of the tips and tricks in order to establish a successful communication with Avaya.
We have recently used Digium gateway as alternative to other existing PRI interfaces and it’s been working like a charm. However, we had a client who needed to monitor the PRI connections and send an email alert whenever the PRI go down. Back then we had no issue with PRI PCI cards as we had access to DAHDI and could simply write a daemon to monitor “pri show spans”. With this gateway however, we cannot do it as simple as that as we have no access to the PRI and there is no SNMP tool whatsoever. The way I could think of was to push the syslog to Asterisk server and parse the syslog looking for anything suspicious. Now here is how I worked that out:
We had a coursework recently which required us to come up with a twitter-like web application in which people can register and write post, read other users’ posts as well as leaving replies to those posts. I have uploaded this application here.
Note: It works best under Firefox or Chrome. IE doesn’t support most of the features included.
I have a 3g mobile stick and in certain circumstances I would need to route internet traffic of a PC/server or a particular subnet through this interface. In a windows OS we could simply achieve this by enabling internet sharing on the interface itself. But in the case of ubuntu we can easily enhance ICS (internet connection sharing) feature to a higher level as internet gateway. This way your linux machine can be turned into a gateway which is way cool, isn’t it?
Recently we had a customer with this cisco conference phone (7937) which doesn’t support SIP protocol. To get it to work with Asterisk we need to either use chan_skinny or chan_sccp. As the latter is a lot more solid is brief you how it work here:
I need to run a php script as a daemon in the background. The thing is I may need to go back and check what’s going on with the script. Using screen window manager we can achieve this in a pretty nice way.
Recently I had a customer who wanted to push all VoiceMail voice files into a table in MSSQL database. After going through a lot of searching and trying I managed to get it running like this:
I wrote the following script to kick out logged in users to Asterisk. (FreePBX deviceanduser mode)
Here is a php file that will read the list of IP phones from a CSV file including MAC address, host IP address, Extension and Secret. Then it will generate a binary for each cfgMAC.temp file.
Download the file here