1. WIRESHARK AND ASTERISK
THE FUTURE OF TELECOMMUNICATION NETWORKS
PRESENTED BY:
USMAN AHMAD I100390
SHAHBAZ ALI I100565
IMRAN AHMAD I100374

2. INTRODUCTION TO WIRESHARK AND ASTERISK
• Asterisk is a software which allows us to create a PBX, and IVR, a conference bridge
or any other virtual communication app one could imagine.
• It provides the functionalities of a PBX and it allows us to connect to other IP networks as well.
• Wireshark is a network packet analyzer software.
• A network packet analyzer captures the network packets and displays the information these packets carry.
• Previously the packet analyzing was very difficult and it required expensive hardware.
• Wireshark is one of the best open source packet analyzer available.

3. ASTERISK - CALL FLOW (CONT’D.)
• Different messages which are exchanged during a call setup are:
• [from-my-pri]
• exten => 14109850123,1,Answer
• exten => 14109850123,2,Wait(2)
• exten => 14109850123,3,Playback(monkeys)
• exten => 14109850123,4,Goto(more-monkeys,123,1)
• [more-monkeys]
• exten => _12X,1,Playback(sorry-no-more-monkeys)
• exten => _12X,2,Hangup

4. ASTERISK - REFERENCES
• http://www.asterisk.org/ - Latest Source Code
• http://www.digium.com/ - Asterisk TDM hardware
• http://www.voip-info.org/ - General VoIP How-To Info
• http://www.xten.com/ - Softphone
• http://www.asterisk-vonage.com/ - Asterisk to Vonage connectivity
• http://www.binary-systems.com/ - Asterisk Consulting & Training Services

5. CONFIGURATIONS OF
ASTERISK AND ZOIPER

6. VMWARE, UBUNTU 12.04, ASTERISK & ZOIPER
o Installation of VMware Work Station
o Installation of Ubuntu 12.04 Desktop 32 bit
o Update Ubuntu server
apt-get update && apt-get upgrade -y && reboot
o Dependencies (In order to compile and install Asterisk, you'll need to install a C compiler and a number of system libraries on your
system)
apt-get install build-essential wget libssl-dev libncurses5-dev libnewt-dev libxml2-dev linux-headers-$(uname -r) libsqlite3-dev uuid-ev
o DAHDI (Digium Asterisk Hardware Device Interface), libpri and Asterisk Installation
cd /usr/src/
wget http://downloads.asterisk.org/pub/telephony/dahdi-linux-complete/dahdi-linux-complete-current.tar.gz
wget http://downloads.asterisk.org/pub/telephony/libpri/libpri-1.4-current.tar.gz
wget http://downloads.asterisk.org/pub/telephony/asterisk/asterisk-11-current.tar.gz
o Extraction of tarballs
tar zxvf dahdi-linux-complete*
tar zxvf libpri*
tar zxvf asterisk*

7. VMWARE, UBUNTU 12.04, ASTERISK & ZOIPER
o Installation of DAHDI
cd /usr/src/dahdi-linux-complete*
make && make install && make config
o Installation of libpri
cd /usr/src/libpri*
make && make install
o Asterisk Installation
cd /usr/src/asterisk*
./configure && make menuselect && make && make install && make config && make samples
o Starting DAHDI
/etc/init.d/dahdi start
o Starting Asterisk and CLI
/etc/init.d/asterisk start
asterisk -rvvv

8. CONTINUED..
o modules.conf
Codecs, protocols, pads
o extensions.conf
exten users
o sip.conf
User registration
o Zoiper entry of users & Configurations

9. VoIP Protocol: SIP
Codecs: A-Law & μ-Law (G.711)
G.711 is a high quality coded for speech. It is a 64 kB bitrate codec based on 8 kS/S sampling of speech
with 8 bits resolution. G.711 uses logarithmic PCM (pulse code modulation)
μ-Law: This codec encodes 14-bit linear PCM audio samples into 8-bit logarithmic samples (American)
A-Law: 13 bit linear PCM into 8-bit logarithmic samples (European)
Call features: app_hangup.so
app_dial.so
app_transfer.so
app_hold.so