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5330/5340 IP Phone SIP User and Administrator Guide
7
Call Encryption Indicator
The 5330 and 5340 IP Phones automatically provide Secure Real-time Transport Protocol
(SRTP) voice encryption when connected to a phone that also supports SRTP. A “secured call”
icon (closed padlock) appears on the display for encrypted calls, and for conference calls in which
all connected parties support SRTP. An “unsecured call” icon (open padlock) appears on the
display when the call connection is not secured (the connected party or parties do not support
SRTP encryption). For an icon to appear, SRTP must be enabled. You can enable SRTP on your
phone using the Feature Configuration page of the Web Configuration Tool. (See Accessing the
Web Configuration Tool Online Help on page 8.)
Note: The padlock icon appears only when you are speaking to a party; it does not appear if you
receive a busy signal.
Accessories for Your Phone
Headsets
The 5330 and 5340 IP Phones support Mitel-approved headsets with a Feature Control Switch.
Install the headset only in the dedicated headset jack on the back of the phone. Installation
disables your handset microphone. Disconnecting the headset at the jack or at the quick-
disconnect plug restores handset operation.