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Grex > Coop11 > #32: How should we determine how many dialin lines we should have? | |
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| Author |
Message |
| 25 new of 154 responses total. |
prp
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response 111 of 154:
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Jul 25 17:40 UTC 2000 |
I think cutting 2 lines leaves 9. That gives a dial-in user a 0.03%
risk of a busy signal. As only unreasonable people want no busy signals
ever, a more interesting number is the risk of two busy singals in a
row.
Lines Risk(%) Odds
9 0.00001 11,111,110:1
8 0.00012 826,445:1
7 0.00116 86,504:1
6 0.00624 16,022:1
5 0.04410 2,267:1
4 0.32376 308:1
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eeyore
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response 112 of 154:
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Jul 26 02:14 UTC 2000 |
Somebody really needs a life.
No offense, really, but I guess I just wouldn't expect anybody to actually
calculate the chances.
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mdw
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response 113 of 154:
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Jul 26 07:46 UTC 2000 |
Only problem with prp's analysis is that people who get a busy signal
are likely to try again right afterwards, so the two events aren't
independent.
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prp
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response 114 of 154:
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Jul 26 23:18 UTC 2000 |
Actually, the bigger problem is that they are based upon 24 hr data. We
know the assumption that people have no preference as time of day is
false.
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prp
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response 115 of 154:
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Jul 27 01:35 UTC 2000 |
Re 112:
Mark's original question was: "How should we determine how many dial in
lines we should have?" There are two schools of thought on that.
The first is that busy signals are bad, AND people do not like change.
Do nothing. It costs more, but people are happy.
The second is that by scientifically collecting and analyzing data, we
can accurately predict what will happen, even though some do not believe
this.
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flem
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response 116 of 154:
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Jul 27 01:37 UTC 2000 |
re resp:110 - Yes. And if it's now appropriate to drop the Ameritech ISDN
line, someone needs to tell me how to do that, too.
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scg
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response 117 of 154:
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Jul 27 05:45 UTC 2000 |
It's ok to cut the ISDN line at Dorian's place. The line in the Pumpkin is
still in use.
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mdw
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response 118 of 154:
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Jul 27 06:02 UTC 2000 |
It's probably best to wait - there's a 50% chance that ameritech will
cut the line at the pumpkin instead.
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pfv
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response 119 of 154:
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Jul 27 06:03 UTC 2000 |
Only 50%?
(isn't there a Murphy's Corollary that talks about chances?)
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krj
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response 120 of 154:
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Sep 14 20:02 UTC 2000 |
I'm going to kick this so it appears new.
A discussion about phone lines is in Agora's System Problems item,
where it is reported that "rarely" are as many as 5 or 6 of our
phone lines are in use. resp:109 says the board voted to cut
two lines earlier this summer; has this been done yet?
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scott
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response 121 of 154:
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Sep 14 21:43 UTC 2000 |
Not to my knowledge.
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scott
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response 122 of 154:
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Sep 14 21:44 UTC 2000 |
Oh, and we should be cutting our ISDN line(s) as well.
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krj
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response 123 of 154:
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Sep 14 21:53 UTC 2000 |
OK. Note that somebody suggested keeping the ISDN line as an
emergency backup, and using it as a dialin line under "normal"
circumstances. I haven't seen anyone analyze the possibility
of that.
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prp
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response 124 of 154:
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Sep 17 22:12 UTC 2000 |
re 120:
The fact thet one person got a busy signal for one call is not worth worring
about.
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flem
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response 125 of 154:
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Sep 18 16:57 UTC 2000 |
I was supposed to call Ameritech and tell them to drop the two lines (why me?
I'm not entirely sure; that's just how it seemed to happen, eh?), as soon as
someone told me "which ones to drop". I have no idea what information is
actually necessary (e.g. are there specific phone numbers that I'll have to
tell them, or "lines 12 and 13", or something else entirely?), so.
I believe that when people started discussing which phone lines to drop,
we got sidetracked by discussion of whether or not we could drop the ISDN
line(s) as well.
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aruba
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response 126 of 154:
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Sep 18 18:10 UTC 2000 |
You need to tell them the phone numbers to drop. Probably they should be
the last two numbers in the hunt group. Scott, what are the last two
numbers in the hunt group?
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scott
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response 127 of 154:
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Sep 18 23:12 UTC 2000 |
According to the "phones" command, the last two numbers are 761-9671 and
761-5159. That's assuming the phones list was updated since the last cut,
but I think it's accurate.
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krj
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response 128 of 154:
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Sep 19 06:46 UTC 2000 |
Also, regardless of the outcome of the exploration of future use for
the ISDN line at the Pumpkin, the ISDN line which is NOT at the Pumpkin
should be disconnected; I don't see any future in which that line is
used.
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janc
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response 129 of 154:
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Sep 25 15:29 UTC 2000 |
New stats. The previous listing for July was only part of the month.
The first column is number of lines in use, the second is total number of
hours the system had that many lines in use, and the third column is the
percent of the time we had that level of dial-in use.
Usage between Sat Jul 1 00:00:00 2000 and Mon Jul 31 23:59:59 2000
of IP addresses: 204.212.46.132
0: 246.99 33.20%
1: 249.12 33.48%
2: 143.82 19.33%
3: 68.51 9.21%
4: 23.88 3.21%
5: 8.01 1.08%
6: 2.27 .305%
7: 0.92 .124%
8: 0.29 .039%
9: 0.02 .0027%
Usage between Tue Aug 1 00:00:00 2000 and Thu Aug 31 23:59:59 2000
of IP addresses: 216.93.104.37 216.93.104.36 204.212.46.132
0: 211.67 28.45%
1: 266.46 35.81%
2: 166.04 22.32%
3: 66.62 8.95%
4: 23.77 3.12%
5: 6.54 .879%
6: 2.32 .312%
7: 0.29 .0390%
8: 0.24 .0323%
9: 0.03 .00403%
Usage between Tue Aug 1 00:00:00 2000 and Mon Sep 25 11:24:51 EDT 2000
of IP addresses: 216.93.104.37 216.93.104.36 204.212.46.132
0: 215.88 36.86%
1: 217.57 37.04%
2: 101.39 17.26%
3: 38.34 6.52%
4: 11.02 1.88%
5: 2.71 .461%
6: 0.41 .0698%
7: 0.01 .00170%
I still think 6 lines would be plenty.
I don't know how many we actually have right now.
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scott
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response 130 of 154:
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Sep 25 15:32 UTC 2000 |
We have eleven.
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spooked
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response 131 of 154:
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Sep 25 17:12 UTC 2000 |
Right, six would be ample.
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janc
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response 132 of 154:
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Sep 25 17:13 UTC 2000 |
Did we ever cut the ones we voted to cut?
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gelinas
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response 133 of 154:
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Sep 26 01:57 UTC 2000 |
Not if we still have eleven.
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eeyore
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response 134 of 154:
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Sep 26 05:56 UTC 2000 |
Well, since Greg was not given the information....(although I think that was
taken care of tonight. :)
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flem
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response 135 of 154:
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Sep 28 19:26 UTC 2000 |
I just got off the phone with Ameritech. I had them drop two dial in lines:
761-9671 and 761-5159, and the four ISDN lines: 761-5416, 761-5676, 761-3590,
and 761-7066.
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