How to calculate n Combinations of m

June 7, 2011
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How to round a number up to a place of significance

June 7, 2011
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How to calculate the Hyperbolic Arctangent of a number

June 7, 2011
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How to calculate the Arctangent between x, y coordinates

June 7, 2011
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How to calculate the Hyperbolic Arcsine of a number

June 7, 2011
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How to calculate the Arcsine

June 7, 2011
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How to calculate the Hyperbolic Arccosine of a number

June 7, 2011
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How to calculate the Arccosine of a number

June 7, 2011
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How to calculate the Absolute Value of a number

June 7, 2011
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Telephony Invoices

June 7, 2011

Telephony invoices are the major output of a billing system. With the changing times, customers have started to become more and more demanding with respect to what they expect from service providers. Accordingly, telephony invoices are much more focused toward what customers want. Typically, telephony invoices are based on the following: Market Segmentation: Customers belong [...]

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Billing Terminologies in the Telecom Domain

June 7, 2011

National: In this perspective, national is a call type. A call would be termed as a national call when the dialed number has the same country code as that of the dialing number. International: A call would be termed international when the called number has a different country code than that of the calling number. [...]

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The Billing System

June 7, 2011

This picture illustrates how the Billing System works:

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Mobile Terminologies

June 7, 2011

Global System for Mobile Communications: Global System for Mobile communications (GSM) is the most well loved standard for mobile phones in the world. GSM service is used by over two billion people across more than 212 countries and territories. The ubiquity of the GSM standard makes international roaming very common between mobile phone operators, enabling [...]

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Public Switched Telephone Network Terminologies

June 7, 2011

Public Switched Telephone Network: The Public Switched Telephone Network (PSTN) is the network of the world’s public circuit-switched telephone networks, in much the same way that the Internet is the network of the world’s public IP-based packet-switched networks. Originally a network of fixed-line analog telephone systems, the PSTN is now nearly entirely digital and now [...]

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