ASSIGNMENT REPORT ON. VOICE OVER INTERNET PROTOCOL(VOIP). PROJECT MEMBERS. SULEKHA TRIPATHI SMRITI RAMTEKE MA DHURI GAVEL KANCHAN SINHA RENUKA DHRUWE. INDEX. INTRODUCTION ADVANTAGE HISTORICAL MILESTONE PROTOCOLS ADOPTION CHALLENGES QUALITY OF SERVICE SUSCEPTIBILTY OF POWER FAILURE
VOICE OVER INTERNET PROTOCOL(VOIP)
Voice over internet protocol (voip) refers to communication protocol & transmission technique mainly used in delivery of voice communication & multimedia session over internet protocol network. terms related to voip are telephony internet telephony & broadband phone.
internet telephony refers to communication ,voice , fax ,sms that are transporter through via internet , main step involver in voip telephone call are signaling & media channel set up, digitization of the analog voice signal ,encoding &transmission as internet protocol over a packet switched network on receiving similar steps are followed in(reverse order) such as reception of ip packet , decoding of packets it offers a business model that mirrored the architecture of telephone network
under 2nd generation such as skype have closed network for private user bases ,giving , the benefit of free calls & convinience while denying user to call through network.
voip system employ session control protocols to control the setup & teardown of calls as well as audio codes which encode speech allowing transmission over an ip network .voip is available on smart phones& Internet devices users can send information through 3g or wi-fi.
VoIP can be used in various ways using both proprietary &open protocols & standards.
LAYER-2-QUALITY OF SERVICE
A PROTOCOL DEALING WITH DATA LINK LAYER& PHYSICAL LAYER INCLUDE QUALITY OF SERVICE MECHANISM
VOIP SERVICE PROVIDERS IMPLEMENT SERVICES TO ROTE CALLS TO OTHER TELEPHONE SERVICES OF SUBSCRIBER.
SUSCEPTIBLITY OF PHONE SERVICE TO POWER FAILURE IS BEING COMMON PROBLEM WITH NEW ANALOG SRVICES THE PROBLEM IS BEING SOLVED A LOT NOW PEOPLE ARE USING WIRELESS HANDSETS TO A BASE STATION.
as potentially endangering the public.
Lack of redundancy
Separation of IP network & PSTN provides redundancy when no portion of call was routed to IP network.
(Provided by SKYPE & ENUM services in & IMS & SIP).
VOIP telephone systems are susceptible to attack as the hackers know about vulnerablities can institute denial-of-service attacks , harvest consumer data, record conversations & break in to voice mailboxes.
To prevent security concerns government& military organisations using voice over secure IP , Secure voice over secure IP to protect confidential& classified VOIP communications.
CALLER IDCaller id support among voip providers varies, but it is provided by majority of voip providers..VOIP service providers allow caller to configure arbitary caller ID information ,thus permitting spoofing attack..The act called as caller ID act of 2009 on dec22,2010 law makes it crime to transmit misleading information..COMPATIBLITY WITH TRADIONAL ANALOG TELEPHONE SETS..SUPPORT FOR OTHER TELEPHONY DEVICE..USER & ADMINISTRATIVE INTERFACE..FAX HANDLING.PROPER HANDLING.
MOBILE VOIP WILL REQUIRE A COMPROMISE BETWEEN ECONOMY& MOBILITY.