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<DIV><FONT face=Arial size=2>Hi,</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Im studing Erlang and I have three quetions I have
been asked to produce the working out for. Im wondering if someone can
help.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2><STRONG><U>Quetion 1:</U></STRONG></FONT></DIV>
<DIV><FONT face=Arial size=2><STRONG><U>Erlang B</U></STRONG></FONT></DIV>
<DIV><FONT face=Arial size=2>You need to design your outbound long distance
trunk groups, which are currently experiencing some blocking during the busy
hours. The switch reports states that the trunk group is 17 erlang of
traffic during the busy hour.You want to have low blockage so yoiu want to
design this for less than 1% blockage. <EM><U>The
answer I got was 27 lines.</U></EM></FONT></DIV>
<DIV><FONT face=Arial size=2><EM><U> But I dont know how I came to this
answer. How do I work this out.</U></EM></FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2><STRONG><U>Quetion 2:</U></STRONG></FONT></DIV>
<DIV><STRONG><U>Extended Erlang B</U></STRONG></DIV>
<DIV>You want to determine how many circuits you need for your dail access
server. You know that you receive about 28 erlangs of traffic during the
busy hour and that 5% blocking during that period is acceptable . You also
expect that 50% of the users will retry
immediatley. <EM><U>The answer I got
was 35 lines.</U></EM>
<DIV><FONT face=Arial size=2><EM><U> But I dont know how I came to this
answer. How do I work this out.</U></EM></FONT></DIV>
<DIV><U></U> </DIV>
<DIV><U><STRONG>Quetion 3:</STRONG></U></DIV>
<DIV><STRONG><U>Erlang C Traffic Model.</U></STRONG></DIV>
<DIV>You are designing your backbone connection between routers. You know that
you will generally see about 600 packets per sec and 200 bytes per packets or
1600bits per packets. Multiplying 600pps by 1600bps packets. gives the
amount of bandwidth you need for 960000bps. You know increments of
64000bps the amount of data necessary to keep the circuits busy for 1
second. How many circuits you need to keep delay to 10 milliseconds.</DIV>
<DIV> </DIV>
<DIV><EM><U>The answer I got was 10 lines.</U></EM>
<DIV><FONT face=Arial size=2><EM><U> But I dont know how I came to this
answer. How do I work this out.</U></EM></FONT></DIV>
<DIV><EM><U></U></EM> </DIV>
<DIV> </DIV>
<DIV>To get these answers I used a calculator, But I would like to know
how to work all this out on paper without the use of a calculator.</DIV>
<DIV> </DIV>
<DIV>Would anyone be able to help. I need this info ASAP></DIV>
<DIV> </DIV>
<DIV>Thanks</DIV>
<DIV>Gerry</DIV>
<DIV> </DIV>
<DIV><A
href="mailto:gr_kc_rodriguez@optusnet.com.au">gr_kc_rodriguez@optusnet.com.au</A></DIV></DIV>
<DIV> </DIV>
<DIV> </DIV></DIV></FONT></DIV>
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