Lunch Time Teaser – 02

Welcome to this month’s lunch time teaser; A practical problem, which is solvable within a 30 minute lunch break. So why not see if you have the skills to solve the problem? The first three names of those able to provide the correct answer will be published.

The Challenge

You work for a telecommunications company that offers hosted PBX solutions for corporate customers. You have just had a very brief and cryptic meeting with the CFO. He says a corporate customer has complained to him about a call appearing on his bill to a very expensive premium rate number in São Tomé, that he claims he did not make. The CFO passes you a switch file that contains some CDRs, and tells you he wants to know who did this. He wants the answer from you within 30 minutes.

Please email your answer to [email protected]

The answer will be revealed in two weeks time.

Lee Scargall
Lee Scargall
Lee is a senior risk management professional. He has extensive experience of managing both ERM and RAFM teams in telcos around the world, having worked for Ooredoo Group, Cable & Wireless and T‑Mobile UK.

Lee earned a PhD in Electrical and Electronic Engineering from the University of Newcastle upon Tyne, UK, for advanced research in to 3G video-telephony.

1 Comment on "Lunch Time Teaser – 02"

  1. Lee Scargall Lee Scargall | 22 Feb 2013 at 4:05 pm |

    I’ve had a few emails all asking the same question, so I just wanted to share with everyone else, that the PBX hack does involve more than one customer.

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