laforge has posted comments on this change. ( 
https://gerrit.osmocom.org/c/osmo-hlr/+/14423 )

Change subject: hlr.c: abort LU without MSISDN
......................................................................


Patch Set 1:

3GPP TS 23.003:
One or more numbers of the ISDN numbering plan shall be assigned to a mobile 
station to be used for all calls to that station, i.e. the assignment of at 
least one MSISDN to a mobile station is mandatory. As an exception, GPRS and 
EPS allow for operation whereby a MSISDN is not allocated as part of the 
subscription data (see 3GPP TS 23.060 [3]
subclause 5.3.17 and 3GPP TS 23.401 [72]).

In practise, as Daniel points out, many GPRS modems will however refuse to 
register on GPRS if the LU on GSM (CS) fails.  So In the end, I think we should 
permit both CS and PS LU for subscribers without MSISDN.

In LTE/IMS, there is even support for SMS without MSISDN.  However, that 
doesn't apply to GERAN/UTRAN.


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Gerrit-Project: osmo-hlr
Gerrit-Branch: master
Gerrit-Change-Id: If1b2f3c9ddfba55bd02510f2dfd481bca2602e3a
Gerrit-Change-Number: 14423
Gerrit-PatchSet: 1
Gerrit-Owner: osmith <[email protected]>
Gerrit-Reviewer: Jenkins Builder
Gerrit-Reviewer: fixeria <[email protected]>
Gerrit-Reviewer: laforge <[email protected]>
Gerrit-Reviewer: osmith <[email protected]>
Gerrit-Reviewer: pespin <[email protected]>
Gerrit-Comment-Date: Thu, 13 Jun 2019 13:48:00 +0000
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