Zultys ZIP4x4, User Manual

Page: 63 / 194

53
C h a p t e r 7
Special Functions
7.1 Message
When you have voice mail messages, the LED on the
Msg
button flashes red for 500 ms and off
for 500 ms. The LED can become lit while you are in the middle of a conversation, if someone has
left you a voice mail while you are using the phone.
To retrieve your voice mail, press the button. If you did not have the phone off hook, the phone
uses speaker mode and dials the number.
1
The operation of the voice mail system is independant of the operation of the phone. Follow the
prompts for the voice mail system to listen to and delete your messages.
7.2 Encryption
7.2.1 Description
The speech traffic to and from an IP phone is sent over the LAN. It is possible for a person who is
equipped with the appropriate equipment to monitor the LAN traffic and thus hear your
conversation. If you want to keep your conversation private so that it cannot be monitored, you
should enable encryption on the phone.
The administrator can select whether encryption is
normally on , normally off , always on , or
never on :
2
•
If the phone is configured so that encryption is always on , pressing the Encrypt button has no
effect. Your phone can make calls only to devices that also support encryption. Your phone
cannot make a call to, or receive a call from, a device that cannot encrypt the speech. You
cannot turn off encryption during a call.
•
If the phone is configured so that you have control over the encryption ( normally on or
normally off ), your phone can communicate with devices that support or do not support
encryption. You can use the Encrypt button to engage or stop encryption. If you make a call
1. The phone dials the address (name or number) stored at memory location 00, for the voice mail server. This address can
be filled from the configuration file or by using the menu. See section 5.2 on page 36 for details of the configuration file.
See section 9.6.5 on page 141 for details how to enter the phone number of the voice mail system through the menu.
2. See section 9.6.6 on page 143 for details.