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  • #32542 Reply

    I am reading an article which mentions BHCC and BHCA, but the artical did not say what they stand for.

    I gather they mean something on nubmer of call connections and completions (maybe per hour?), but would actually like to know what the exact wording is.


    #32543 Reply
    D. Lover

    I know for sure that BHCC stands for Busy Hour Call Completions. I will assume that BHCA stands for Busy Hour Call Attempts.

    #32544 Reply

    BHCA is Busy Hour Call Attempts.I use this from Traffic catergory measurement in our GSM network.
    But I didn’t really know BHCC.

    #32545 Reply
    Jose Quintero


    Busy Hour call completion, meand the capacity of one PBX to establish call between Users

    #32546 Reply
    Richar Arcadi

    I believe that BHCC means BHC Completion, as already posted. BHCA
    is already explained.

    The relationship (for trunks with
    blocking = 0%), is as follows:


    where ASR means Attemping Size Ratio, or the probability for a
    call to get a free channel and be
    completed (0% Blocking factor).

    ASR is to be measured after operations, but a rough estimate for it is between 0.65 and 0.8.

    #32547 Reply
    Francois Rust

    BHCA = BHCC x 3
    This is a rule of thumb. Does it still apply?

    #32548 Reply
    Muhammad Arshed. (pakista

    Mainly Mr. Francois and Richar are correct. Mainly there should be a lot of difference between BHCA and BHCC.

    Busy hour:

    We define busy hour as a particular time in which the network experiences the maximum load.The period in which the maximum number of call attempts are made, this is called BHCA, the quantity of calls in one hour of time over the one tgrp is called BHCA of the TGRP.
    CA=successful calls +unsuccessful calls

    the BHCC is calls completeed in busy hour. It is always less than BHCA. Because it excludes the unsuccessful calls.

    ASR in a normal network is 40%
    over the trunk it is 35% normally.

    #32549 Reply
    Ed Var

    But going a little further, does somebody know the relationchip between BHCA and the effective traffic carried in the Network during the busy hour?

    #32550 Reply
    Alexis Reyes

    If you have just one E1 or T1, then the effective traffic is given by BHCC calculation (# of completed calls * Mean holding time / 3600). Note that BHCA=BHCC.
    Traffic Offered is calculating the number of erlangs using Erlang B table based on the number of circuits available in the TG and GOS. Note 1 TG not ever is 1 E1 or 1 T1.

    #32551 Reply
    Alexis Reyes

    BHCA is grather than or equal to BHCC

    #32552 Reply
    Arshed( Pakistan)

    I have a question. UMTS is a solution for wireless network for the high bandwidth internet connection.

    My question is, do we have such solution for fixed wireline network.

    #32553 Reply
    PVG, India

    Is there any standard figure for BHCC figure? I have 1000 port PABX system. Can anybody tell me what should be the MINIMUM BHCC figure for my system?

    #32554 Reply
    Mike Walker

    What is the optimum length of an experiment if you are trying to get 99.99 BHCC at 3000 BCHA?

    #32555 Reply
    Eric Kim

    I heard that a E1 circuit can handle commonly about 300,000 minutes of traffic per month. Is that right?

    If so, how can it be possbile?

    #32556 Reply

    E1= 30 CH
    1 hour = 60 mins
    1 day =24 hours
    1 month = 30 days


Viewing 15 posts - 1 through 15 (of 102 total)
Reply To: BHCC and BHCA
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