E1

Unanswered Question
Jul 17th, 2010

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,

I have this problem too.
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PATRICK GESCHWINDNER Sat, 07/17/2010 - 13:58

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 Sat, 07/17/2010 - 14:20

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 Sat, 07/17/2010 - 22:01

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.

jontypearce Wed, 11/30/2016 - 06:39

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.

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