– "OFF" (default): Encryption is disabled."Encryption Key (SIP)": Enter an encryption key(4 to 256 characters [alphanumeric, space,symbols]) (Page 158).Note• &, <, >, comma (,), double quotation mark(") cannot be entered.• While being entered, the characters of theencryption key are displayed, but once thesettings are saved, all the characters will bedisplayed as asterisks (*), and you will nolonger be able to check the encryption keyon the screen. Record the encryption keybeforehand, and store it in a safe location.• If the value specified in "Encryption Key(SIP)" does not match the other party’s, thevideo conference call will not start even ifencryption is enabled.• When the encryption key is displayed asasterisks (*), pressing [Y] deletes the entireencryption key.• The name of "Encryption Key (SIP)"changes depending on the connectionmode.– When IP mode is used: "EncryptionKey (SIP)"– When using NAT Traversal mode:"Encryption Key (NAT Traversal)"– When using IP/NAT Traversal mode:"Encryption Key (SIP / NAT Trav.)""Encryption (H.323)": Press [ENTER] and use[ ][ ] to select whether to enable encryption.– "Best effort": enables encryptedcommunication when the other party hasenabled encrypted communication. Whendisabled, communication is performed withoutencryption.– "ON": Encryption is enabled.– "OFF" (default): Encryption is disabled.Note• This setting is available only when"Admin" is selected for "Access mode(SIP)"/"Access mode (H.323)".3. Press [G].• A dialogue box to confirm the saving of settingsis displayed.4. Use [ ][ ] to select "Yes" and press [ENTER].• The administrator menu screen is displayed.Making Software UpdateSettingsPreparation settings for updating the software can bemade here.Note• The DNS server setting is necessary to checkfor upgrades and to download the latestsoftware from the network (Page 102).1. Select "Update Settings" and press [ENTER].• The update settings screen is displayed.2. Use [ ][ ] to select the following items for input:"Proxy Server Address": Enter the IP address ofthe proxy server.Note• IPv6 addresses cannot be used for setting.• If the IP address contains 1 or 2 digitnumbers, enter these numbers as they are.Do not enter like [.001].Example: The IP address is [192.168.0.1].– Correct entry: [192.168.0.1]– Wrong entry: [192.168.000.001]"Proxy Server Port": Enter the proxy server portnumber (1–65535)."Automatic Version Check": Use [ ][ ] toselect "ON" or "OFF" (default).• When "ON" is selected, the unit willautomatically look up the DNS server or proxyserver to see if there are updates for yoursoftware on start-up. If updates are available, adialogue box is displayed on the Home screen.• When "OFF" is selected, the unit will notautomatically look up the DNS server or proxyserver to see if there are updates for yoursoftware on start-up.3. Press [G].• A dialogue box to confirm the saving of settingsis displayed.4. Use [ ][ ] to select "Yes" and press [ENTER].• The administrator menu screen is displayed.Document Version 2015-08 User Manual 121Contacts and Settings