GSMK CryptoPhone PSTN/1i
User Manual
Page 1: ...GSMK CryptoPhone PSTN 1i User Manual...
Page 2: ...ly switched off intentionally you can switch it on again by briefly pressing the Power button see also Section H of this manual 7 Wait two to three minutes for the system to initialize The phone will...
Page 3: ...a normal telephone The clear text conversation will not be encrypted and could be monitored and intercepted 2 3 Hang up the telephone receiver when you wish to finish the call 1 The CryptoPhone PSTN...
Page 4: ...erify the authenticity of the key Please take a look at the telephone display and read the three letters after SAY to your partner and check the three letters after CHK Reading the three letters to yo...
Page 5: ...sticated voice impersonation during key verification you could periodically re verify the letter code with your partner during the conversation 2 1 3 Hang up the telephone receiver when you wish to fi...
Page 6: ...rotect yourself agains the so called man in the middle attack 3 Hang up the telephone receiver when you wish to finish the call Note that for security reasons it is not possible to switch from secure...
Page 7: ...de will take significantly longer due to the way the call setup is handled in this mode Note that during a mobile to fixed line connection from the CryptoPhone PSTN 1 to a mobile GSM CryptoPhone it is...
