E1

[ali nasser]

hi

I have CISCO 7.1  integrated with nortel 81c with 4 PRI-QSIG link, I need to know if its enough for 500 users, if there is any tools in cisco to calculate that,

please provide.

Regards,

[PATRICK GESCHWINDNER]

This is calculated using the Erlang formula. Free Erlang calculators are available in the internet. Use Erlang B for the calculation of necessary B-Channels (which is what you need). Callcenter calculators are using the Erlang-C formula. Here is only one of the many examples:

Erlang B: http://www.erlang.com/calculator/erlb/

Erlang C: http://www.kooltoolz.com/ccm.htm?gclid=COOX0Jq586ICFUfX5woddySqhQ

Best

  Patrick

[Mohammed Al-Assadi]

Hi Patrick,

I think he is asking about normal users not Contact Center.

Erlang calculation for Call Centers.

Erlang B to calculate IVR and trunk ports ( as you know in IPCC you are expection calls more than agents)

Erlang C to calculate the Agents.

Regards,

[paolo bevilacqua]

Erlang "calculations" are useless in most cases.

Some users do a lot of calle and some do never calls.

The only working way is to observe real usage of an exisiting trunk.

[agenses01]

In addition to the earlier provided free Erlang calculators one can also use this online erlangc calculator at

http://www.agenses.com/489/free_erlangc_calculator/

Feel free to use it

[jontypearce]

There is also an Erlang C Calculator in Excel format which could help with your calculations

Erlang C Calculator

This also contains shrinkage calculations so will be more accurate.