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How to Block Ghost Calls on the Phones

Writer: tan shi yiingtan shi yiing

Updated: Aug 6, 2021




Ghost calls will usually affect the phone level. You may find it annoying by getting authorized calls. You can increase the security on the affected phone by setting the following parameter to YES in Grandstream IP Phones - GXP16XX/17XX/21XX

  • Validate Incoming Messages

  • Check SIP User ID for Incoming INVITE

  • Accept Incoming SIP from Proxy Only

  • Authenticate Incoming INVITE

  • Anonymous call rejection option




 
 
 

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