TracPhone FleetBroadband, Руководство пользователя

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Chapter 3: Operating the IP Handset
IP Handset functions 49
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O
p
er
at
ing the
IP
H
a
nd
se
t
To make a secure call
1. To make a secure call, type the phone
number and press or # .
2. To go secure, the caller or the person
called presses Main options, then Go
secure to initiate a secure session . Then
the display shows Going secure .
The encryption keys are negotiated, the
peer is authenticated and the voice
streaming is en- and decrypted.
The key negotiation may take up to 30
seconds. During this period, voice is
muted.
Upon successful key negotiation and peer
authentication, you hear an audio signal in
the IP Handset to inform you that a Short
Authentication String (SAS) is shown in the
display. This string consists of a
combination of 4 digits and characters
(symbols).