Top Telecom Interview Questions :: ALLInterview.com http://www.allinterview.com Top Telecom Interview Questions en-us What is the main difference between GSM & CDMA? http://www.allinterview.com/showanswers/76398.html gsm is global system for mobile communication. it uses fdma & tdma. cdma:- it stands for code division mutiple access. What is protocol testing. whether u have used any tool in telecom te http://www.allinterview.com/showanswers/3705.html protocol testing is testing the performance and evaluate it in working conditions for wireless i have tried GlomoSim simulator, as it has ability to test 100 nodes on single cpu and for thousands of nodes multiprocessor and parallel version i 1)what is cdma technology? 2)how can cdma work? 3)history of cdma? http://www.allinterview.com/showanswers/10973.html Short for Code-Division Multiple Access, a digital cellular technology that uses spread-spectrum techniques. CDMA is a military technology first used during World War II by English allies to foil German attempts at jamming transmissions. The what is GSM? http://www.allinterview.com/showanswers/24008.html globle mobile service. What is the difference between layer 2 and layer 3 in the OSI model? http://www.allinterview.com/showanswers/13514.html The layer2 ,datalink layer is responsible for moving frames from one hop(node)to the next.Whereas in layer3 i,e network layer is responsible for the delivery of individual packets from source host to destination host. in voip telephone witch part will convert data anolog to digital, di http://www.allinterview.com/showanswers/13609.html gatways What's the Difference Between Routers, Switches and Hubs? http://www.allinterview.com/showanswers/13497.html A hub is prone to collisions as pc's connected to a hub form a single collision domain. Where as in a switch each port is a collision domain and the bandwith of each port is fully utilized. Each port is a collision domain in a swith. What is the need of CPG message in ISUP protocol? http://www.allinterview.com/showanswers/36543.html A message, sent in either direction during the setup or active phase of the call(ex.inbetween ACM and ANM), indicating that an event, which is of significance, and should be relayed to the originating or terminating access, has occurred. What are the various blocks in GSM architecture? http://www.allinterview.com/showanswers/73252.html ms, BTS, BSC, MSC, HLR, VLR etc... What equipment is needed for VoIP? http://www.allinterview.com/showanswers/7698.html The main requirement is a broadband Internet connection such as DSL or cable. Any other equipment such as a telephone adapter or microphone usually comes with the VoIP service provider. What are the advantages to VoIP? http://www.allinterview.com/showanswers/7699.html The big advantage is VoIP may save you money depending on how much you are currently spending for local and long- distance calls. What you will need to do is get the total cost the phone company is charging and compare it against a VoIP plan t How does VoIP work? http://www.allinterview.com/showanswers/7697.html To understand how VoIP works, you will be taken through the process of voice transmission from one end to the other. The process starts with a person talking into the mouthpiece on one end of a VoIP call. This analog voice signal must first What is a NOC? http://www.allinterview.com/showanswers/13531.html Network operation center What is the IP address of the switch? http://www.allinterview.com/showanswers/13510.html The switch can obtain its IP configuration automatically using one of the following protocols: ?Bootstrap Protocol (BOOTP) ?Dynamic Host Configuration Protocol (DHCP) ?Reverse Address Resolution Protocol (RARP) The switch makes BOOT what is url http://www.allinterview.com/showanswers/57442.html Uniform resource locator