| CPC H04W 4/90 (2018.02) [H04W 4/021 (2013.01)] | 14 Claims |

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1. A method for interacting of a Public Service Answering Point (PSAP) with a portable network device comprising:
establishing a call between the portable network device and the PSAP;
detecting a trigger signal of an eyewitness-button;
storing call log data of the call by the PSAP;
setting up by the PSAP a signaling connection between the portable network device and the PSAP;
determining in the PSAP a geographical area of interest close to the actual location of the portable network device;
determining a list of external portable network devices comprising at least one external portable network device located within the geographical area of interest;
scanning the at least one external portable network device of the list;
protecting by the PSAP the signaling connection from unauthorized access for forwarding data of an external portable network device;
forwarding the scanning result from the at least one external portable network device of the list via the signaling connection to the PSAP.
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