Generic selectors
Exact matches only
Search in title
Search in content

How the Value of E1=2.048 Mbps comes?

  • This topic is empty.
Viewing 11 posts - 16 through 26 (of 26 total)
  • Author
    Posts
  • #65382 Reply
    Wallis Dudhnath
    Guest

    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.

    #65383 Reply
    kishor
    Guest

    how E1 is divided into 32 time slot

    how 32 value came

    #65384 Reply
    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 Reply
    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 Reply
    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 Reply
    ravinder singh
    Guest

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

    #65388 Reply
    lalit kumar
    Guest

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

    #65389 Reply
    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 Reply
    ashok
    Guest

    any one tell me about some interview questions o&m

    #65391 Reply
    ashok
    Guest

    call handover

    #65392 Reply
    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)
Reply To: How the Value of E1=2.048 Mbps comes?
Your information:




<a href="" title="" rel="" target=""> <blockquote cite=""> <code> <pre class=""> <em> <strong> <del datetime="" cite=""> <ins datetime="" cite=""> <ul> <ol start=""> <li> <img src="" border="" alt="" height="" width="">