Interested to Buy Any Domain ? << Click Here >> for more details...
what is SDH and PDH relate the differences between them?
- 3 Answers
- 50986 Views
- Ericsson, Tata Teleservices, I also Faced
- E-Mail Answers
Answer Posted / p jayakumar
PDH is Plesiochronous Digital Hierarchy and SDH is
Synchronous Digital Hierarchy.Both are used in PCM
transmission systems. Both use TDM principles for PCM
frames.
The difference is In PDH the clock used is not the
same throughout the transmission network. But in SDH a
synchronous clock is used in the entire Transmission system.
PDH is the old system used for only point to point
communication and interconnectivity between the sytem is
difficult.Whereas SDH is the lattest system used in any
kind of transmission configuration and interconnectivity
between different systems is very easy.PDH used in
2Mb,8Mb,34Mb and 140 Mb systems only.But SDH used in STM-1
(155.52Mbps,STM-4(622.08Mbps),STM-16(2.5Gbps) and STM-64
(10G BPS) transmission systems.
There are many merits in SDH
Easy for Add Drop multiplexing/Demultiplexing is easy.
Very useful for Ring configuration in optical
communications.
Easy growth to high bit rates in steps with evolution of
transmission technology.
Capable of transporting ATM(Asynchronous Transfer Mode)
channels,DLC(Digital Loop Carrier) is working on SDH.
SDH is the Indian sytem which is equivalent to American
SONET(Synchronous Optical Network)
| Is This Answer Correct ? | 150 Yes | 11 No |
Post New Answer View All Answers
WHAT IS THE DIFFERENCE BETWEEN HORIZONTAL AND VERTICAL POLARIZATION IN MICROWAVE LINK?
What is the chief characterstic of master-slave flip flop?
Which one of the following polarization mechanisms/sets of mechanisms contribute to the static dielectric constant of a homopolar neutral dielectric?
What is Response time of a thermocouple and a PT 100
I am stuck up with a question on appending of two arrays
I am writing the code for the same, I am appending two
strings this way
int main()
{
string s1 = "Welcome to C++";
string s2 = "C++ improves the logic ability";
string s3 = s1 + s2;
cout< What is tunnel diode? What is zigbee? what is the difference bet 4 wire transmiiters and 2 wire transmitters What is ideal voltage and ideal current? why we use low and high radio band in m/w link at both end
what are the universal logic gates? I am importing dc-dc converters from singapore to india.
how much tax will be applicable towards Custom duty.and the
rates of the custom duty. Explain the use of ranging and radar? I've an interview for post of Lecturer in a ece
Department.
Can anyone send me some possible questions that can be
helpful for me??????? snd me karur vysya bank clerk model papers
kundavarapu.harish90@gmail.com
