On the discussion forums you can often find terminators’ requests for help in solving the problem of registration of SIM-cards. Often, cards, inserted in the SIM-bank slots or gateway are not registered in the GSM network.
Moreover, this problem can occur with both the cards of a particular mobile operator and all operators at once. What is the cause and how to fix it?
There may be several reasons:
- PIN-codes have not been removed from the SIM-card;
- The device firmware is obsolete;
- There are errors in the protocol settings.
The first case is banal. SIM-cards will not be registered in the GSM-network if they have PINs. This problem often occurs when you use the soft decisions for the automatic removal of the PIN since the program can skip some of the passwords. It is best to manually cancel the PIN code for each SIM-card, which is used in GSM termination.
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The second option often occurs with goip 32 gateways, as well as the SIM-banks produced by GoIP and China Skyline. For troubleshooting, you should simply upgrade the firmware. You can download a newer version for one of the GSM-modules, in which a SIM card is not registered, and if that does not work, you have to cross-flash all the SIM-bank or GSM gateway. Current firmware versions are usually available on the websites of termination equipment manufacturers. When connecting the VoIP equipment to GoAntiFraud cloud service, you can forget about these problems. The system automatically assigns the most current versions of firmware the devices.
Another case in which the SIM-card cannot be registered in the GSM network is hen the gateway and SIM bank have protocols that are not compatible. It is necessary to use equipment operating on the basis of the same VoIP protocol - for example, the SIP or H.323.
Using the sim box gsm gateway for GSM termination, you should think in advance about the removal of PIN-codes from all SIM-cards, provide relevant versions of firmware for gateways and SIM-banks, and ensure compatibility of equipment protocols so that the probability that the SIM-card will not be registered in the GSM network is minimized.
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