- This topic has 7 replies, 1 voice, and was last updated 16 years, 11 months ago by Eranga.
17th June 2004 at 10:54 #38487CasperGuest
I have to get the MSISDN of an outbound roamer, when I know that subscribers IMSI. What’s the SS7 MAP request to do that and to which node do I need to send that request?
Thanks in advace!
Eranga18th June 2004 at 00:23 #38488UpdateGuest
To HLR the update subscribet request will go and HLR will reply that insert sunscriber18th June 2004 at 00:50 #38489UpdateGuest
If my explanation is wrong please help me to also to correct it18th June 2004 at 15:20 #38490HariGuest
This is what i found in spec
GSM 03.12 [ Location Registration Procedure ]
22.214.171.124 Downloading of subscriber parameters to the VLR
As a part of the location updating procedure, the home location register will convey the subscriber
parameters of the MS which need to be known by the visitor location register for proper call handling. This
procedure is also used whenever there is a change in the subscriber parameters that need to be
conveyed to the VLR (e.g. change in subscription, a change in supplementary services activation status).
If the HPLMN applies the multinumbering option, different MSISDNs are allocated for different Basic
Services (see GSM 09.07) and stored in the HLR. Among these MSISDNs, the Basic MSISDN Indicator
as part of the HLR subscriber data (see GSM 03.08) marks the ‘Basic MSISDN’ to be sent to the VLR at
location update. It is used in the VLR for call handling as calling party and as line identity.
But i of what i can understand and analyse this is not “for sure” access method to collect MSISDN given IMSI.
Hari21st June 2004 at 23:32 #38491RaoolGuest
U can use the MAP_SendParameters
message to get the MSIDN from
This message is sent to the HLR.
Pass the “Request Parameter” as ‘Request Subscriber Data’ in this message. It will also give you lots of other data for this IMSI.
-Raool22nd June 2004 at 04:47 #38492ErangaGuest
Thanks for the information. But I cannot find a MAP_SendParameters MAP message in GSM phase 2+. Is that in Phase 2+ or 3?
Thanks for your information.
Eranga22nd June 2004 at 20:29 #38493RaoolGuest
MAP SendParameters is a GSM phase 1 message.
Unfortunately finding the documentation for it is difficult.
But you can find the ASN easily.
Use that one
Raool23rd June 2004 at 04:51 #38494ErangaGuest
Even Dialogic (Intel Septel) MAP documentation doesn’t have anything about MAP SendParameters message. I suspect if that ss7 map stack supports that message.
Anyway thanks for the information. I will search along those guidelines. In worst case, I might have to extract the packet from the TCAP layer.