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4th July 2015 at 15:40 #65382Wallis DudhnathGuest
Just a follow on to all the excellent answers.
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.10th October 2015 at 05:40 #65383kishorGuest
how E1 is divided into 32 time slot
how 32 value came10th October 2015 at 12:33 #65384Wallis DudhnathGuest
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 Dudhnath29th October 2015 at 06:51 #65385Junior TSHONGOGuest
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?”29th October 2015 at 07:53 #65386Wallis DudhnathGuest
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 Dudhnath26th April 2016 at 10:01 #65387ravinder singhGuest
hii i am ravinder.pl send me data relative call procssing.and all data relative interview10th August 2016 at 08:12 #65388lalit kumarGuest
Sir, how can do short of one E1 bandwidth from 2.048 MBPS into 64 Kbps channel in tejas system?25th August 2016 at 10:41 #65389Wallis DudhnathGuest
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 Dudhnath30th November 2016 at 16:05 #65390ashokGuest
any one tell me about some interview questions o&m30th November 2016 at 16:09 #65391ashokGuest
call handover1st December 2016 at 11:14 #65392Wallis DudhnathGuest
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