call can still be established if the encryptionkeys match. Setting a Shared EncryptionKeyNote• There is a danger that encryption settings willbe changed by a third party. Therefore, becareful when managing the administratorpassword and giving users the authority tochange encryption settings.1. Perform steps 1–6 in "If the unit has been usedbefore".• The admin menu screen is displayed.2. Use [ ][ ] to select "Encryption" and press[Enter].• The encryption settings screen is displayed.3. Use [ ][ ] to select the following items for input:"Access mode": Use [ ][ ] to select "Admin"."Encryption": Use [ ][ ] to select "ON".Note• If the "Encryption" setting does not matchthat of the other party in a video conferencecall, the video conference call will not start."Encryption Key": Enter an encryption key (4 to256 characters [alphanumeric, space, symbols]).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 noDocument Version 2012-03 NAT Traversal Service User’s Guide 17Setting up KX-VC Series NAT Traversal Service