Voip

N
Dhaka International University
Presentation topic: VOIP
Submitted by
Name : Md.Rokonuzzaman
Roll : 27
Reg No: 103454
Batch No: E-36th
Submitted to
Md. Abdul Baset
Chairman of EETE,
Dhaka International University
Submission Date: 27-March-2020
Page no: 01
Contents
Abstract
 What is VoIP
Applications of VOIP
How VoIP works
VoIP Architecture
 Technical Issues
Legal Issues
Page no: 02
Abstract
Voice over Internet
Protocol (VoIP) is a
technology that enables
one to make and receive
phone calls through the
Internet instead of using
the traditional analogy
PSTN (Public Switched
Telephone Network) lines.
Page no: 03
What is VoIP
Voice over Internet Protocol, also called IP
telephony, is a method and group of technologies
for the delivery of voice communications and
multimedia sessions over Internet Protocol
networks, such as the Internet.
Page no: 04
VoIP is packetisation and transport of classic
public switched telephone system audio over an
IP network.
 It allows 2-way voice transmission over
broadband connection.
 It is also called IP telephony, internet telephony,
voice over broadband, broadband telephony.
Page no: 05
Applications of VOIP
Some application that you used in our daily life
is based on VoIP.
Like Skype, Gtalk, Yahoo Messenger, Fring, E-
buddy, Nimbuzz, Twinkle, Brosix, SIPSet,
Gizmo, iChat, iCall that are used on various
platform like Windows, Linux, MAC OS X,
Android and many mobile platforms.
Page no: 06
Page no: 07
How VoIP works
 VoIP protocols first converts your voice or
media into digital signal and travels over the
internet. At receiver side it decode in its
original format.
 VoIP allows you to make a call from your
desktops/laptops or from IP phones using
internet. You can make a call from your
traditional telephones using special type of
phone adapter.
Page no: 08
VoIP Architecture
Page no: 09
Technical Issues
1. Choppy Voice
 Turn off all other computers connecting to your
network.
 Test our bandwidth speed. There are several websites
that offer this service free.
 Check your running applications for bandwidth usage.
 Test for malware and spyware. There are several free
anti-malware software available online.
 Configure your router’s QoS to prioritize voice
applications.
Page no: 10
2. Echo
To resolve VoIP echo issues, try these easy steps:
 Cover your phone’s mouthpiece. If the echo lessens, it
means that you just need to turn down the volume of your
earpiece/speakers.
 Move your router away from your computer’s monitor, CPU
and power strip.
 Disconnect splitters and caller ID devices connected to your
router and your phone.
 Inspect your system’s wiring. Make sure your cables are dry
and not too long.
 Replace old equipment.
 Use a corded phone, instead of a cordless one.
Page no: 11
3. Jitter and Jitter Buffer
Jitter refers to the variation in the arrival time
of voice packets. To ensure that conversations
are understandable, the jitter buffer collects
the packets first and then sends them to the
receiver at an even pace. Sometimes though,
the jitter buffer can be wrongly configured,
which can result in dropped packets and low
quality voice calls.
Page no: 12
4. Bandwidth-Related Problems
 Decrease impeding equipment between your computer/SIP
phone, and network connections. For instance, you should
connect directly to your router/switch, instead of accessing
the net via Wi-Fi.
 Check your equipment and wiring. Damaged ones can
cause delays, which you may wrongly attribute as
bandwidth-related.
 Do a power cycle to see if renewed connections can speed
things up for you.
 Turn off all other applications, especially those that use up
a lot of bandwidth, such as gaming apps.
 Set your QoS to allot top priority to Voice Applications.
Deprioritize gaming and other similar apps.
Page no: 13
5. Monitor Your Network and VoIP
• To ensure that you’re on top of your VoIP’s
performance, subscribe to a 24/7/365 VoIP
monitoring service provider, such as VoIP
Spear. These business services do round-the-
clock testing of key VoIP performance
parameters and send alerts when you need to
take action. This way, you can do these simple
troubleshooting steps yourself or, in worse
cases, call your tech support.
Page no: 14
Legal Issues
Difficult to administrate due to (international)
location independence of IP
VoIP also makes use of encryption more easy
ETSI is working on the issue concerning
technical arrangement
Page no: 15
Voip
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Voip

  • 1. Dhaka International University Presentation topic: VOIP Submitted by Name : Md.Rokonuzzaman Roll : 27 Reg No: 103454 Batch No: E-36th Submitted to Md. Abdul Baset Chairman of EETE, Dhaka International University Submission Date: 27-March-2020 Page no: 01
  • 2. Contents Abstract  What is VoIP Applications of VOIP How VoIP works VoIP Architecture  Technical Issues Legal Issues Page no: 02
  • 3. Abstract Voice over Internet Protocol (VoIP) is a technology that enables one to make and receive phone calls through the Internet instead of using the traditional analogy PSTN (Public Switched Telephone Network) lines. Page no: 03
  • 4. What is VoIP Voice over Internet Protocol, also called IP telephony, is a method and group of technologies for the delivery of voice communications and multimedia sessions over Internet Protocol networks, such as the Internet. Page no: 04
  • 5. VoIP is packetisation and transport of classic public switched telephone system audio over an IP network.  It allows 2-way voice transmission over broadband connection.  It is also called IP telephony, internet telephony, voice over broadband, broadband telephony. Page no: 05
  • 6. Applications of VOIP Some application that you used in our daily life is based on VoIP. Like Skype, Gtalk, Yahoo Messenger, Fring, E- buddy, Nimbuzz, Twinkle, Brosix, SIPSet, Gizmo, iChat, iCall that are used on various platform like Windows, Linux, MAC OS X, Android and many mobile platforms. Page no: 06
  • 8. How VoIP works  VoIP protocols first converts your voice or media into digital signal and travels over the internet. At receiver side it decode in its original format.  VoIP allows you to make a call from your desktops/laptops or from IP phones using internet. You can make a call from your traditional telephones using special type of phone adapter. Page no: 08
  • 10. Technical Issues 1. Choppy Voice  Turn off all other computers connecting to your network.  Test our bandwidth speed. There are several websites that offer this service free.  Check your running applications for bandwidth usage.  Test for malware and spyware. There are several free anti-malware software available online.  Configure your router’s QoS to prioritize voice applications. Page no: 10
  • 11. 2. Echo To resolve VoIP echo issues, try these easy steps:  Cover your phone’s mouthpiece. If the echo lessens, it means that you just need to turn down the volume of your earpiece/speakers.  Move your router away from your computer’s monitor, CPU and power strip.  Disconnect splitters and caller ID devices connected to your router and your phone.  Inspect your system’s wiring. Make sure your cables are dry and not too long.  Replace old equipment.  Use a corded phone, instead of a cordless one. Page no: 11
  • 12. 3. Jitter and Jitter Buffer Jitter refers to the variation in the arrival time of voice packets. To ensure that conversations are understandable, the jitter buffer collects the packets first and then sends them to the receiver at an even pace. Sometimes though, the jitter buffer can be wrongly configured, which can result in dropped packets and low quality voice calls. Page no: 12
  • 13. 4. Bandwidth-Related Problems  Decrease impeding equipment between your computer/SIP phone, and network connections. For instance, you should connect directly to your router/switch, instead of accessing the net via Wi-Fi.  Check your equipment and wiring. Damaged ones can cause delays, which you may wrongly attribute as bandwidth-related.  Do a power cycle to see if renewed connections can speed things up for you.  Turn off all other applications, especially those that use up a lot of bandwidth, such as gaming apps.  Set your QoS to allot top priority to Voice Applications. Deprioritize gaming and other similar apps. Page no: 13
  • 14. 5. Monitor Your Network and VoIP • To ensure that you’re on top of your VoIP’s performance, subscribe to a 24/7/365 VoIP monitoring service provider, such as VoIP Spear. These business services do round-the- clock testing of key VoIP performance parameters and send alerts when you need to take action. This way, you can do these simple troubleshooting steps yourself or, in worse cases, call your tech support. Page no: 14
  • 15. Legal Issues Difficult to administrate due to (international) location independence of IP VoIP also makes use of encryption more easy ETSI is working on the issue concerning technical arrangement Page no: 15