Welcome to It-Slav.Net blog
Peter Andersson

I've already got a female to worry about. Her name is the Enterprise.
-- Kirk, "The Corbomite Maneuver", stardate 1514.0

My internet connection is a crappy ADSL line.   I noticed that I did get alot alerts from op5 Monitor complaining about high error rate on the external network. After some investigation I noticed that UDP port 5060 generated approx 1.5 Mbps in traffic and that is more or less maximum my ADSL connection can […]

After waiting for several weeks, my new phone, a HTC Desire has finally arrived. I have been a heavy cellphone user since started working as a Tivoli consultant in -98. I bought my first cellphone -94 and have had several so called smart phones both from Nokia and Ericsson.   For the first time I […]


  I have read the book Asterisk now by Nir Simionovich, published in March 2008. The book was a big disappointment, the reason is that the book do not cover the software used in AsteriskNOW today. The book cover the Asterisk GUI but AsteriskNOW is using FreePBX instead which is totally different. One main reason to use AsteriskNow […]

Filled Under: asterisk, english, Review

After the problems I have had with Bredband2, I want to test Phonzo.se as a new VoIP provider. I registered on their homepage and after a couple of days I got a snail mail with my credentials. I configured my FreePBX and calling in worked directly, but not outgoing. After 2 hours of troubleshooting I started to google "phonzo asterisk" and […]

    I have finished reading the great book "FreePBX 2.5 Powerful Telephony Solutions", by Alex Robar and it is 277 pages.  

  I have read the excellent book Asterisk 1.6, Build feature-rich telephony systems with Asterisk by David Merel, Barrie Dempster and David Gomillion.   The book is inteended to anyone interested in bulding a telephony system using Asterisk and are 224 pages. The book claims that no preknowledge about opensource, Linux and Asterisk is required. I think […]

Filled Under: asterisk, english, Hints

I have been noticing an increasing number of telemarketing phonecalls the last weeks and I would like to avoid having those callers disturbing me or my family. They have been calling at 9am, 11am, 1pm, 8pm during the weekdays, saturday and sunday.   I have been running an asterisk system to handle my VoIP calles […]

This article describe howto monitor an Asterisk server with Nagios or op5 Monitor. Pre-req to get it running is a working Nagios or op5 Monitor installation and an Asterisk 🙂 Theory In my implementation of Asterisk I have a couple of softphones, 2 hardphones and connections to two SIP providers. I want to monitor the […]

Do you want to integrate your perfectly working op5 Monitor or Nagios installation with Asterisk? I’ve configured op5 Monitor to call me when it detects a problem, to listen to an example click on link below: 11880larm1 The text below is op5 Monitor centric. op5 Monitor is based on Nagios so the principle is the […]

Book reviews
FreePBX 2.5
Powerful Telephony Solutions

Asterisk 1.6
Build a feature rich telephony system with Asterisk

Learning NAGIOS 3.0

Cacti 0.8 Network Monitoring,
Monitor your network with ease!