Look up the term Erlang:
http://en.wikipedia.org/wiki/Erlang_unit
I also remember there were things called Poisson Tables, but it's been
years since I've seen one.
http://en.wikipedia.org/wiki/Poisson_process
That'll give you an idea of what you're really up against if you want to
get technical about this.
In a law firm, the issue isn't always just how many lines they need, but
also how to integrate the lawyers with their assistants. About 10 years
ago I remember a law office that had 3 analogue lines from Bell for each
lawyer, because they all wanted their own number, and didn't want calls
to ever get a busy signal. Those lines stayed idle 90% of the time. The
proper solution would have been to give them a PRI, but that was just
too fancy for them, so they happily paid thousands of dollars each month
for all those analog circuits.
If the client currently has a certain amount of lines, why not just
install based on that and then tweak it later? Are they getting blockage
complaints? Are they thinking to reduce the line count to save money?
Bell will typically do a traffic study for customers. Have them call
Bell and ask for a traffic study. That'll give you some sort of idea of
utilization, but if they want zero blockage, you have to typically size
beyond what the traffic stats would indicate.
Jim
[email protected] wrote:
Hi Alex,
8 trunks, 24 users, legal firm.
I am looking at models but none seem to exist. Any opinion?
Bob
On Fri, Feb 27, 2009 at 12:58 PM, Alex Kink <[email protected]> wrote:
Bit more info on the company would help.
How many people total, how many sales people, customer support?
On Fri, Feb 27, 2009 at 12:35 PM, <[email protected]> wrote:
Hi there, would anyone care to offer up an opinion on what you would deem
to
be typical call usage minutes on a trunk? It is for a termination
utilization calculation (not a call centre, just a typical enterprise
customer) with 8 or 9 x 5 business hours operating on a 5 day week.
Curious if anyone could provide an opinion.
Origination (In bound):
Termination (Out bound):
Could be either on a per trunk or per user basis. I am about to make a
guess, and I would appreciate a second or third viewpoint.
Any input would be appreciated !
Bob Smith
[email protected]
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Jim Van Meggelen
[email protected]
http://www.oreillynet.com/pub/au/2177
"A child is the ultimate startup, and I have three.
This makes me rich."
Guy Kawasaki
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