Voip - uma nova maneira de se comunicar.

VOIP & IP Telephony
A new way to communicate

• Julio Gomes
• Jésus Caetano

Concept
What is VoIP?


VoIP (Voice over Internet Protocol), or simply Voice over IP, is a communication technology not much widespread that allow us to make and receive calls using the internet.



Basically consists in digitalize the voice in data packets for traffic under IP networks, and convert back in voice again in its destination. VoIP
What I need?


Stable Internet Connection – Upload and download equivalentes



Well structured network



Computer/Portable, Smartfone, Cellphone (SIP)



Softphone



Analogic Telephone Adaptor - ATA



Gateway VoIP



IPBX



Asterisk Server



VoIP Account

Features
 Peer to Peer Communication
 Voip allows that extensions, located remotelly, can communicate as if the person were in the next room.

Matriz /SP

Filial / Manaus

100

10
20

Cloud

101

30

102

Features
Remote Communication
It’s possible, through mobile equipments, be a remote extensions in environments with internet connection, having all facilities than a commom extension.

Matriz /SP

Ambiente Wi-fi

10
WAN

20

30

CLOUD

Celular Wi-fi
Protocolo SIP

VoIP

If VoIP is so good, why mine never works or it’s terrible when
I can talk????

VoIP - Troubles
 I can’t make calls!
Possible causes



No Internet Connection or insufficient badnwidht.
Instable Internet Connection



Problems with VoIP Provider



VoIP - Troubles



Voice/Call Cutting


Problems with VoIP Provider



High Latency – Packets response time higher than 150ms



Higher time of transmission between packets- Jitter



Packets loses higher than 3%

Features

 Voip techonlogy implemented a lot of features like:


Calls on Hold
You can give a call and put others on hold, including the possibility of information about the queue position and