Answer to L.T.T. – 07

Congratulations to all those who got the answer correct for LTT-07. They are Wessel Scheepers, Sriram Dharmarajan, Arun Rishi Kapoor, Kamal Khattar, Michael Lazarou, Jeeson Thekkekara, and Guy Howie. 

Analysis of the billing suspense file reveals there is one test call in there, so answer A = true.

4487878712326, 4487878712336, 14/07/2013, 10.41:07, 00:00:20, No rate plan

A further analysis of the mediation suspense file reveals there is also one test call in there, so answer B = true.

_____________, 4487878712338, 14/07/2013, 10.43:09, 00:00:40

And analysis of the consolidated MSC1,2,3 switch file, reveals the remaining test calls were not recorded by any of the MSCs, so it is possible there could be a hidden switch, so answer C = true. Therefore, the right answer is D = (A+B+C).

The next LTT will be published on Monday 19th August.

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.
  • Congrats to everyone who got the answer correct! (I know I wouldn’t have.)

    I like how LTT appeals to people across the world. To my mind, the best kind of validation comes from seeing how a smart guy in South Africa is independently arriving at the same conclusions as another smart guy in India, or the Americas, or wherever. Lee’s doing a great job as quizmaster, but I’m also thinking that everyone who submits an answer is providing really useful feedback. Thanks to you all, and keep up the good work :)