top button
Flag Notify
    Connect to us
      Site Registration

Site Registration

Is it mandatory to have an MSISDN associated with a IMSI record on the HLR?

+4 votes

M2M devices and data cards without voice services may not need an MSISDN, how are such records maintained on the HLR? Is it mandatory to have an MSISDN associated with every IMSI record on the HLR? If yes, can we just have a dummy/fake MSISDN associated in such a case so to avoid consuming/wasting a real MSISDN?

posted Jul 3, 2013 by Prasad Shetty

Share this question
Facebook Share Button Twitter Share Button LinkedIn Share Button
Adding my thoughts, not really an answer:

I agree your point for M2M devices where MSISDN would not be required as they can have IP connectivity alone. However a fallback to SMS channel if IP is not available can also be argued as need for MSISDN.

But for the evolving Datacard scenario, the operators are providing rich UI with the datacard where you can have personalized inbox to send and receive SMS, get usage stats, etc. It might be required to have MSISDN for datacards in such case.

It is however interesting to know if on a need basis the MSISDN can be re-used or have dummy MSISDNs.

1 Answer

0 votes

The home location register (HLR) is a central database that contains details of each mobile phone subscriber that is authorized to use the mobile core network. There can be several logical, and physical, HLRs per public land mobile network (PLMN), though one international mobile subscriber identity (IMSI)/MSISDN pair can be associated with only one logical HLR (which can span several physical nodes) at a time.
Datacards, dongles do have the MSISDN/IMEI/IMSI so it should not be a problem, however in some case specially related with IMS these things may not be present in that case the database is not HLR rather something else.
In case fake MSISDN it is technically possible but why operator will like to do that???

answer Jul 3, 2013 by Salil Agrawal
Similar Questions
+2 votes

IMSI and MSISDN are used to denote the mobile in some sense i.e. Sim Identification or User identification. My question is why we have two numbers, is there any relation between these i.e. can we deduce IMSI from MSISDN or vice versa. Is it necessary to have both numbers or there can be cases when only one number is available or applicable.

0 votes

As imsi number will be one even there r many msisdn numbers

+1 vote

Hi ,

If any subscriber roamling in International Location how we can check on Home HLR/HSS to get its Int roaming Location .

Any specific parameter to get the details .

+3 votes

What are the commands in Ericsson / Huawei / NSN for HLR and separately for HSS in order to retrieving the location of subscribers that are currently uotbound roam in specific countries (specific VLRs) and the respective outputs (Printout)