Zultys ZIP4x4, User Manual

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ZIP4x4 User’s Manual
7.2.2.5 When the Other Party Turns on Encryption During a Call
If your phone has been configured to allow encryption, the phone immediately accepts the
encryption request and lights the LED on the Encrypt button continuously. The speech is now
secure. Your phone makes no sound and makes no change to the LCD.
7.2.2.6 When You Select to Turn Off Encryption
To turn off encryption on a call prior to dialling:
•
If the phone is configured so that encryption is normally off , the phone does not attempt to
encrypt the call when you initiate it.
•
If the phone is configured so that encryption is normally on , press a free call appearance
button then press the encrypt button.
If you turn off the encryption during a call, your phone turns off the LED on the Encrypt button.
The speech is no longer encrypted and therefore not secure.
If you try to turn off encryption and the other person is using a device that can accept only
encrypted speech, the other device will reject the request and your phone flashes the LED on the
encrypt button for two seconds (250 ms on and 250 ms off). The speech will remain encrypted and
thereafter the LED on the Encrypt button remains lit continuously.
7.2.2.7 When the Other Party Selects to Turn Off Encryption
If the person with whom you are talking turns off the encryption, your phone beeps three times
through the audio channel that you are using, turns off the LED on the Encrypt button, and
displays:
The phone holds this display for two seconds, until you press a key, or go on hook.
7.2.3 Holding, Parking, Transferring, and Forwarding Calls
When you put a call on hold or park it, the other person’s device now communicates with the call
manager system, whereas it previously communicated with your phone. Similarly, when you
transfer a call or forward a call, the other person’s device now communicates with someone else’s
phone.
In each of these cases the encryption policies of the devices have to be compatible or the call may
be dropped.
For example, consider the case when you are speaking with a person who puts the call on hold:
•
If your phone is configured for normally on or normally off , it will adapt to the new speech
path coming from the phone system by either engaging or turning off encryption.
Warning:
Encryption turned
off by far end.