Free Erlang traffic calculators The world's first online Erlang traffic calculators
Telecom Traffic Online
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This site contains online resources to assist the global network professional with telecommunications traffic design and analysis. Whether you design PBX networks or international carrier networks, we hope this site will help you.

  • Internet telephony

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A-Z termination using H.323 and SIP
A-Z termination

Erlang software

We provide a range of software products to assist in the design and analysis of global voice networks, including Voice over IP support. Prices start at just 99 US Dollars.  Our product range includes basic Windows calculators for performing traffic and VoIP bandwidth calculations; tools to assist in the analysis of call centres and and add-in for Microsoft Excel that allows Erlang calculations to be performed within Excel workbooks.
  • Erlang for Excel

    An Add-In for Microsoft Excel that lets you use Erlang B and C functions in your own Excel spreadsheets.

    The ultimate in Erlang traffic modelling flexibility and data sharing.

  • Erlang Calculators

    An easy to use and fast Windows product offering Erlang B, Extended Erlang B, Erlang C and Call Minutes calculators.

    Four products in one, plus Erlang for Excel free.

  • Ansapoint

    Easily estimate the number of agents and trunks required at your call centre.

    Handles 15, 30 or 60 minute analytical intervals and includes reporting and graphing features.

  • VoIP Lite

    Our entry level VoIP calculator allowing you to easily calculate your Voice over IP bandwidth requirements.

    Available for immediate download at only 99 US Dollars.

  • VoIP Select

    Design and use your own VoIP calculators using drag and drop techniques.

    We used this software to design our own VoIP calling service.  Now, we offer it for everyone to use.

  • Westplan

    Simplifies the complicated design process involved in creating effective voice networks.

    Support both traditional circuit switching techniques and Voice over IP.

Later in 2008, we will be launching DUAL Softswitch, a powerful and flexible VoIP switching and billing platform.  DUAL Softswitch includes a wealth of features to enable to you offer a SIP and H.323 calling service.  Click here for more information and to register your interest.

Free Erlang calculators

Our free Online Erlang Traffic Calculators can be used now to work out the number of lines required in a trunk group, and to assist in call centre analysis. They include tools for Erlang B, Extended Erlang B, Erlang C, Engset and Voice over IP.

Telecom discussion groups

Share ideas on our four discussion groups covering Telecommunications Design, Voice over IP and Call Center operations. Your article will appear as soon as it is submitted. You can reply to other articles to form threaded newsgroups.

Here are the last three messages posted to our most popular forum.  Click here to join in now.

Author Subject Date Message (part)
COSMONITO RRU REVISION ERICSSON 6 Oct 2008 hi, what the commande in MML to know the revision of RRU of micro BTS for ERICSSON equipements thanks in advance...
Ram handover intra BSC 6 Oct 2008 Hi ozibi, Check for the CGI, BSIC, BCCH values of cells and the neighbors in both the BSCs. If the o/g calls are normal...
pix IMSI Trace from the BSC (OSS) 5 Oct 2008 hi bob smith, i'm not looking for someone to create this application. It would be fairly simple, probably a little ex...

Internet Telephony

We offer high quality retail Internet Telephony and Wholesale A-Z termination through our DUAL Talk calling service.   Calling rates are very competitive, and online account management is available for all customers.  Our offer includes a powerful online accounting system for call shops and an advanced VoIP Reseller programme.

We also offer an aggressively rated A-Z termination product for wholesale customers.

Technical documents and FAQs

Browse our collection of white papers and Frequently Asked Questions. These discuss telecom design issues such as how to apply Erlang calculations to the technical design of a call center.

Our customers and what they say about us

We are proud to have satisfied customers from around the globe.  Our customers vary in size from one man consultancy businesses to some of the largest telecommunications carriers in the World.  Find out who they are, and what they think of our products and service.
AT&T British Telecom Cisco Microsoft Corporation United Nations
Intel Corporation AOL Telstra Ford Motor Company IBM
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Last modified: 06 June 2008

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