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Technology Stocks : LAST MILE TECHNOLOGIES - Let's Discuss Them Here

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To: Frank A. Coluccio who wrote (1791)8/4/1998 1:51:00 AM
From: wonk  Read Replies (2) of 12823
 
Frank:

...This should only be a problem less than ~0.2% (<?>) of the time if the carrier has sized the plant provisions correctly, which means they've taken all of the traffic dynamics into account, correctly.

Rather than 0.2% I believe the standard for COs is 2%, generally written as "p.02" (the "p" short for probability). If memory serves, the Erlang B formula (blocked calls cleared) is used in this instance. However, for larger trunked groups (from the CO to the tandem or direct to an IXC POP) I believe the standard is p.01 or less and the Poisson formula is preferred (blocked calls delayed). While 2% at first blush seems high, it is applied against the "busy hour" traffic, which is continuously monitored and updated.

Traffic modeling research continues, see:

baltzer.nl

Unfortunately, I need a dictionary to get through a single sentence of most of the abstracts.

The challenge is the growth rate of the traffic and the willingness of the carrier to stay ahead of the curve: but you already said that.<g>

ww
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