Playing of Announcement for barred Subs with Non Registered SIM

normally for networks operating in a country where SIM Registration is compulsory the SIMs of non-registered subscribers is mandatorily barred after certain number of days allowed by the GSM regulator.

To play an announcement for unregistered SIM subs upon initiation of outgoing call a feature is activated on the HLR, this is the PLMN-SS (operator defined supplementary service, this command is used to provide or withdraw the PLMN-specific supplementary services for specific sub or batch of MSISDN.). The PLMN-SS has multiple services using

• PLMN-SS-1 to PLMN-SS-9 and  PLMN-SS-A to PLMN-SS-F

Upon activation of this service for a sub on the HLR an ISD message is sent to VLR , failure scenario is then tied to a specific Cause value and Tone ID on the MGW for playing of announcement to sub upon initiation of outgoing calls. Note the sub profile should also have the GPRS/ODB Barring commands active for ODB data & ODB In/Out calls, depending on operator specifics and particular type of services to be opened for the Non-registered SIM card subscriber.

Refer to Hedex HLR 9820 documentation (latest version) for more details on the PLMN-SS feature and services.

(from Hedex GU HLR 9820 product documentation - "If the command is executed to provide the PLMN-specific supplementary services, the HLR delivers an Insert Subscriber Data message to the VLR. If the command is executed to withdraw the PLMN-specific supplementary services, the HLR delivers a Delete Subscriber Data message to the VLR.)