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Grade of Service

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Viewing 15 posts - 31 through 45 (of 125 total)
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  • #33345 Reply
    Muzammil.
    Guest

    Hi,
    I see a lot of guys are pitching here for Erlang table.

    Here’s the link for Erlang table
    http://www.karneyonline.com/technology/gsm/erlang1.htm

    And in PDF format,
    http://www.ittc.ukans.edu/EECS/EECS_663/ LOCAL/erlang-table.pdf

    Hope this helps………….
    Muzammil

    #33346 Reply
    Zubair A.Khurshid
    Guest

    Dear Mr Muzammil,

    No pdf table was found at the given URL.

    Can any body guide about it?

    #33347 Reply
    ahmad zafir
    Guest

    Lets checked on this url:

    http://www.itu.int/itudoc/itu-d/dept/psp/ssb/planitu/plandoc/erlangt.html

    however it’s valid until 300 circuit only.

    #33348 Reply
    nieta
    Guest

    can u tell me the different between erlang A table, erlang B table and erlang C table.
    please help me. i need ur answer.
    In GSM technology, what GoS they used?

    #33349 Reply
    Julian
    Guest

    Nieta:

    I’ve no idea on Erlang A. Erlang B is for systems w/o call queuing whilst Erlang C applies to systems with a queue for holding all requested calls not immediately assigned a channel.

    #33350 Reply
    c.kristhudass rabert
    Guest

    hello Dears….

    1.What is line signaling & register signaling?

    2.What is N-ISDN & B-ISDN ?

    3.What is in-band signaling & out- band signaling?

    4.Tell me breifly about E1 & T1

    5.Tell me About timeslots in GSM Base stations ?

    6.How to use CDMA & What is frequency planning in CDMA?

    #33351 Reply
    Luigimex
    Guest

    Answer to 1 …4

    1. Line signalling: represent the status of the line (hook on or hook off). Register signaling: represent the translation and storage of digits, for example digits dialled as tones from telephone are translate by a switch into digits to know where to route the call)

    2. N ISDN:narrow band ISDN, it is to have over 1 single line two channel that allow to have at the same time two different calls. B ISDN: Broad Band ISDN, to increase bandwith over telephony to support multimedia

    3. In band signalling that uses de same path and media to tranfer information, example R1, R2 for trunks. Outof band that siganling is over other media, example CC7 or SS7 for trunks.

    4. E1 is 30 voice channel (Europe Standard), T1 is 24 Channesl (USA standard).

    5. 6 apologize (not idea)

    #33352 Reply
    mostafa
    Guest

    5.In GSM each TRX contains 8 timeslots, wich can be devided between signalling chanels & TCH (traffic) chanels depending on the need.

    #33353 Reply
    c.kristhudass rabert
    Guest

    hello dears…

    1.what is SDH ?

    2.what is synchronization in e1 link?

    3. e1 – 32 channal
    |
    0……..31
    |
    each is 8 bits
    |
    explain about this 8 bits stream of each channal.

    if you have brief answer,
    send me to
    sarvamus@yahoo.com

    #33354 Reply
    David Drysdale
    Guest

    If anyone has an Excel spreadsheet for Erlang B that they could send to david.drysdale@ties.itu.int I would be very grateful.

    #33355 Reply
    Mostafa
    Guest

    I think that :

    1-SDH stands for Synchronous Digital Hierarchy,it’s a standard of transmission where the unit is
    STM-1 ( 155Mb).This standard is built over multimode fiber.It represents the evolution of PDH: plesiochronous…,based on G703 standard with the famous E1=2Mb.

    2-Synchronisation, is the first TS 0 in the E1 wich shows to the system that the E1 frame starts from here.

    #33356 Reply
    nieta_0612
    Guest

    thx’s 4 everyone who helped me.
    i want to know, what is the different between omnidirectional antenna and isotropic antenna ?
    how calculate capacity channel (416 channels)?

    #33357 Reply
    zohra
    Guest

    if anyone can help me in “Trafic théorie and Erlang formula” they could send to “amaidizohra@yahoo.fr”
    Great thanks

    #33358 Reply
    uday joshi
    Guest

    Hi,
    pl. tell me about digital gain in CDMA terminology.

    #33359 Reply
    c.kristhudass rabert
    Guest

    1.what CDMA ?
    I need brief explanation.

    Those who knows this pls

Viewing 15 posts - 31 through 45 (of 125 total)
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