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  • Make sure that your SIP Proxy does not send a count of GSM calls higher than the GSM gateway capacity.
  • If the frequent SIM card change is set, reduce the maximum count of calls via the GSM gateway – the GSM modules are temporarily unavailable for standard calls while being in the process of recharging (especially the IVR type), virtual incoming calling or SIM replacement.


More product information:

  • 2N® SIM Star (Official Website 2N)