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# How the Value of E1=2.048 Mbps comes?

Viewing 11 posts - 16 through 26 (of 26 total)
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• #65382
Wallis Dudhnath
Guest

First of all analog Voice has a frequency range upto 3400Hz.

In order to convert the analog voice to a digital we use PCM (analog / digital
conversion). The voice signals will need to subjected by a process
known as sampling, quantisation and encoding (binary level).
As speech is 3400Hz the sampling rate is 8000Hz. The encoding generates
8 bits of information.

A TDM E1.0 system has 32 Time Slots. Time slot 16 is used for signalling (by
convention) and Time Slot 0 (zero) is used for synchronisation and Frame alignment.

From the mathematics:-

– 32 Time Slots * 8 (bit encoding) = 256bits
– 8000Hz * 256bits = 2.048MB/s.

This also explains why a E1.0 link is know as a 2M link / connection.

#65383
kishor
Guest

how E1 is divided into 32 time slot

how 32 value came

#65384
Wallis Dudhnath
Guest

32 Time slots – This is a PCM / E1.0. Done by convention to have 32 Time Slots and a sampling rate of 8000Hz (Nyqvist).

VBR/ Wallis Dudhnath

#65385
Junior TSHONGO
Guest

I NEED TO SHARE THIS QUESTION WITH ALL OF YOU AND SEE IF WE CAN GET A ANSWER:” AN AMPLIFIER WITH 3dB GAIN IS FED WITH A 6WATT INPUT SIGNAL. WHAT IS THE OUTPUT POWER IN WATTS?”

#65386
Wallis Dudhnath
Guest

Decibel is not an absolute level –

It is purely a comparison between two levels, and on its own it cannot be used to measure an absolute level. As a result of this the quantities of dBm and dBW are used:-

dBm – This is a power expressed in decibels relative to one milliwatt.

dBW – This is a power expressed in decibels relative to one watt.

VBR/ Wallis Dudhnath

#65387
ravinder singh
Guest

hii i am ravinder.pl send me data relative call procssing.and all data relative interview

#65388
lalit kumar
Guest

Sir, how can do short of one E1 bandwidth from 2.048 MBPS into 64 Kbps channel in tejas system?

#65389
Wallis Dudhnath
Guest

Hi Lalit,

I understand from your question is that you would like to extract a 64kbits/s stream from a Timeslot?

You will need a de-MUX equipment.

VBR/ Wallis Dudhnath

#65390
ashok
Guest

any one tell me about some interview questions o&m

#65391
ashok
Guest

call handover

#65392
Wallis Dudhnath
Guest

Hi Ashok,

For O&M look at FCAPS: Fault, Configuration, Accounting, Performance and Security. Telecommunication systems and solutions are built around FCAPS.

For Handovers, this is built into the GSM/3G/4G 3GPP Technical Specifications.

VBR/ Wallis Dudhnath

Viewing 11 posts - 16 through 26 (of 26 total)
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