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E1 framed/unframed

Viewing 9 posts - 1 through 9 (of 9 total)
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  • #66560 Reply
    al83
    Guest

    Can someone explain the difference between Framed and Unframed E1.

    #66561 Reply
    Geek
    Guest

    Framed or also known as structured E1, means that it has the protocol needed to distinguish each time slot in a frame.
    A 2048 kbps E1 frame has 24 Time slots. TS 0 usually is used for signaling and the remaining TS will each contain a 64 kpbs voice channel. This is needed when older style telecom transmission is used and you need to have the TS separated. See ITU-T G.704 for reference.
    Sampling with 8bits at 8kHz was the normal ETSI telephony digital sampling standard before (and still are at many places yet), giving the 64kbps channels. So a E1 actually could carry 23 simultaneous Telephony connections.

    Unframed means that there are no structure with TS, only a bitstream of 2048 kbps. It will not be possible to divide this stream into Time slots.

    #66562 Reply
    Geek
    Guest

    Ah, I just realized that I was thinking T1 here.
    The number of time slots in E1 shall be 32 not 24 🙂

    #66563 Reply
    srinivas
    Guest

    How to convert .PL4 files to .MDB?
    I was trying to convert it through .NTC butit was not successful.

    Please suggest me!

    #66564 Reply
    al83
    Guest

    Thanks Geek

    #66565 Reply
    HARJEET
    Guest

    HOW MANY CALL IS ON ONE TIME SLOT SIMULTANUSLY

    #66566 Reply
    bjushka
    Guest

    hi,

    In one timeslot we can have simultaneously, only one voice call if the timeslot is full rate and two voice call if it is half rate.

    In one TDMA frame, we can have 8 users at the same time.

    #66567 Reply
    Salvo
    Guest

    What do you mean with 8 users?
    Aren’t there at least 31 TS to be used simultaneously by one user per TS?
    Half rate would mean x2?
    Or will there be a need for signaling which takes all other TS?

    #72156 Reply
    Vinay Loohach
    Guest

    Earlier i got confused about how much channel does E1 has after reading your above comment its later on i noticed that you have corrected it.

Viewing 9 posts - 1 through 9 (of 9 total)
Reply To: E1 framed/unframed
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