Sunday, August 10, 2014

SDM (Subscriber Data Management)/ HLR (Home Location Register)

SDM is a database. It consists of following main features.
  • HLR (Home Location Register): HLR is a static database. 
  • AUC (Authentication  Centre):  Authenticate a subscriber into the network.


  • EIR  (Equipment  Identity  register):  An  EIR reduces  the  threats  of  theft  of  handsets  by enabling  individual  operators  to  prevent  the  use  of  stolen  handsets  in  their  own networks. This improves users' security by switching off stolen phones, making them useless for mobile phone thieves and thus less likely to be stolen in the first place
  • MNP  (Mobile  Number  Portability):  MNP  enables  mobile  telephone  users  to  retain their mobile telephone numbers when changing from one mobile network operator to another.

Services that can be configured using a HLR

  • PRBT (Phone Ring Back Tone)
  • CAMEL (Customized Applications for Mobile Enhanced Logic): Can set triggers when a call is originated (CCSI) or when a location changes (MCSI)
  • ODB (Operator Determined Barring) : i.e. suspend a post-paid customer 

A typical HLR profile will include below fields:



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  7. Hello there! I came across your blog post on "SDM - Subscriber Data Management: HLR, HSS, and One HLR Concept" and found it very informative. Your article provides a detailed explanation of the various components of SDM and how they work together to manage subscriber data. It's fascinating to learn about the evolution of SDM and how it has become an essential component of modern telecommunications systems.

    Your discussion of the Home Location Register (HLR) and the Home Subscriber Server (HSS) was particularly interesting. It's impressive how these components manage subscriber data and enable smooth communication between different networks. I also appreciated the way you explained the concept of One HLR, which simplifies the management of subscriber data and enables operators to offer more personalized services to their customers.

    Overall, your article provides a great overview of SDM and its various components. I would recommend it to anyone who wants to learn more about the behind-the-scenes workings of telecommunications systems. Thank you for sharing your knowledge and insights!

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