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E1

Viewing 15 posts - 1 through 15 (of 17 total)
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  • #39900 Reply
    omer
    Guest

    hey all…

    i am new to the GSM wrld…having trouble understanding wat E1 is? and how it is transmitted btw different nodes? and wat relation is there btw E1 and SS7?

    thx

    #39901 Reply
    alexander
    Guest

    Hi !
    E1 is an old standard for 2M transmission lines and it’s still the most widely used standard in telecom field, it consists of 32 timeslots of 64k each. E1 has no correspondense wich SS7 since E1 is just transmission link but SS7 is a logical signalling link wich may occupy 1 or several timeslots on E1.
    alex
    http://www.dx200.biz

    #39902 Reply
    omer
    Guest

    could u explain in detail wat u mean by
    “E1 is just transmission link but SS7 is a logical signalling link ”

    and is there any document or website with all this detail?

    thx alot 4 ur help

    #39903 Reply
    alexander
    Guest

    E1 is a name for 2048 Kbit/s transmission link which consists of G.704/G.703 etsi specification protocols. If you need more document about this protocols, let me know, I can send it to you by email, or you can find them on the web site http://www.etsi.org
    again, E1 is a name for 2048 Kbit/s transmission line which consists of 32 timeslots, you can place on this line any other protocols which occupy less then 2M.
    alex
    http://www.dx200.biz

    #39904 Reply
    omer
    Guest

    hey
    could u please send me the E1 documents at

    choksi_00@yahoo.com

    thx

    #39905 Reply
    Oliver
    Guest

    Hi all:

    Try to download a very interesting E1 document from http://www.acterna.com

    This is really helpfull or you can get G.703 ITU Recomendation.

    #39906 Reply
    Eric
    Guest

    Hi all,

    Does anybody know how to test the
    requirement of G.703 6.3.1 ?

    That clause is :
    6.3.1 The digital signal presented at the input port shall be as defined above but modified by the characteristic of the
    interconnecting pair. The attenuation of this pair shall be assumed to follow a f law and the loss at a frequency of
    1024 kHz shall be in the range 0 to 6 dB. This attenuation should take into account any losses incurred by the presence
    of a digital distribution frame between the equipments.

    It would be grateful if you can shed some light on me.

    Thanks,

    Eric

    #39907 Reply
    Omer
    Guest

    Hey Oliver
    where on the website can i find the E1 document?

    thx

    #39908 Reply
    alexander
    Guest

    the best site to find almost any doumentation is http://www.etsi.org

    alex
    http://www.dx200.biz

    #39909 Reply
    Quang Vinh
    Guest

    Hi, omer!
    64kbps SS7 signalling channel can assign in any time slot in E1, from TS1 to TS31,except TS0.

    #39910 Reply
    PARTH
    Guest

    HI I WANT TO KNOW ABOUT E1 LINES?
    I KNOW THAT IN THAT 32 TIMES SLOTS ARE THERE. BUT I DO NOT UNDERSTAND IT?
    HOW THESE TIME SLOTS ARE POSSIBLE IN A LINK?
    IT WILL BE HELPFUL TO HAVE DOCUMENTS FOR THAT.
    THANKIG YOU.
    WAITING FOR YR REPLY.

    #39911 Reply
    Dapinder
    Guest

    hi ,

    Can u please send me a documentation of E1 ,channels and timeslots.

    maximum no timeslots are used for data and signalling.

    My email id is dapinder3106@gmail.com

    #39912 Reply
    quangvinh
    Guest

    Hi, Dapinder!

    Similar to the North American T-1, E1 is the European format for digital transmission.

    E1 carries signals at 2 Mbps (32 channels at 64Kbps, with 2 channels reserved for signaling and controlling), versus the T1, which carries signals at 1.544 Mbps (24 channels at 64Kbps). E1 and T1 lines may be interconnected for international use.
    It has 32TS (TimeSlot), assigned:
    +TS0: for only synchronous purpose. 8 bits is “X0011011”. It indicates the starting point of frame. X- CRC code option.
    +TS0-TS15: data channel: voice, fax, v.v… You can used Nx64kpbs.
    +TS16: for R2MFC signalling and multi-frame synchonazation. In CCS7 system, TS16 also carriers the data.
    + CCS7 can be carriered in any TS, from TS1-TS31.
    Regards.

    #39913 Reply
    barzinj
    Guest

    any one knows about Erlang? please send me a documentation

    #39914 Reply
    Dapinder
    Guest

    Thanks

    quangvinh

    for helping me.Great help

    Regards
    dapinder

Viewing 15 posts - 1 through 15 (of 17 total)
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