How do you calculate the # of T1 needed for call center?

[Irvineguy]

Do you have to use some type of formula?

 

[jml2665]

Erlang is your friend

http://www.erlang.com/

online tool for calculating if you want to use it, I am sure there are tons of other methods but hey this is online and the name and methods are well know

 

[Irvineguy]

Thank you!

 

[artesian2000]

My rule of thumb i've used over the years. T-1 24 trunk on average get push 150-200k minutes a month. Now call center tend to push this limit based on volume so I tend to go with the 125-150k. If you can ballpark your in/out minutes you can ballpark # of t-1's.

 

[Irvineguy]

Do you use trending and busy time reports too?

Is 75% trunk usage the reasonable maximum capacity?

 

[jon24422531]

Not too relevant for call centres, but there is a sizing tool at this site that some other readers may find helpful:

http://www.telecom-stuff.com/

Regards

Jonathan

http://www.telecom-stuff.com

 

[ISDNman]

OK, I have avoid being snarky so far, but seeing how the thread has been revived....

Here is my formula.

Take the number of trunks required and divide by 24!

 

[jon24422531]

Hey ISDNman, don't take all the mystique out of it.

Jonathan

http://www.telecom-stuff.com

 

[biglebowski]

Easy:

For every 1000 callers complaining = 1 Trunk
For every 1000 callers wanting to buy something = 1000 Trunks

When I was born I was so suprised I didn't talk for 18 months

 

[mikeyb123]

or have as many trunks as you like and just cut down the number of agents...... we have hundreds of trunks and not enough agents....

we keep running out of trunks.. we've bust on music connections, our call pilot is full (96 access ports) and wait times fo 40 -50 mins and it's still our fault...

It's not getting any smarter out there. You have to come to terms with stupidity, and make it work for you.

 

[ISDNman]

So, has anyone ever done a poll to determine if callers would rather get a Busy if the wait time is above some threshold (like maybe 30 minutes).