Service Menu
33
3.
4.
:
:
Select the required Central
Directory
5.
6.
Or
7.
8.
[
]
n
Encryption Check
This is used to determine whether or not the handset can be used
to make encrypted calls only. It is strongly advised not to set this
check to
Off
as that increases the risk of unauthorized listening in
to calls being made to and from the handset.
1.
2.
3.
4.
Or
5.
6.
[
]
n
Environment Muting
This is used to adjust the muting behavior of the handset with
respect to dealing with so called “bit errors” in the voice RTP
