13-01-2012, 04:41 PM
IP TELEPHONY
IP telephony project..docx (Size: 18.16 KB / Downloads: 49)
INTRODUCTION:-Internet telephony refer to communication service –voice fax , sms and voice messing application that are transport by internet, rather the public switch telephone network.
The step involved in organizing a VoIP telephone call are signaling and media channel step , digital of the analog voice signal , encoding and transmission as INTERNET PROTOCOL (IP) packet over a packet switch network.
On the receiving side similar step(only in the reverse order) such as reception of the IP packet, DECODING OG THE PACKET AND DIGITAL TO ANLOG CONVIRSION REPRODUSE THE ORIGINAL VOICE STREAM.
PRINCIPAL:- A COMMUNICATION PROTOCOL IS A FORMAL DISCRIPTION OF DIGITAL MASSAGE FORMAT AND RULE OF EXCHANGE those massage in between computing system and telecommunication.
FEATURE:-
Security:- From hackers
Network address translator for traffic)
Secure Real-time transport
ADVANTAGE:-
Oprationl cost
Easy
Global
DISADVANTAGE:-
Security risk
Cyber crime
CONCLUSION:- As the popularity of VoIP grows, and PSTN users switch to VoIP in increasing number. Government are more becoming more interested in regulating VoIP in manner similar to PSTN service.