Terminal Signaling Encryption and Decryption

Logon procedure

When the user presses the logon button, the phone prompts the user to enter a PIN code. The Regional Authorization Code (RAC) configured for the terminal is the PIN code.

• If the user does not enter the PIN code, the RRQ (for H.323) or Register (for SIP) is sent insecurely. Whether this registration is accepted or not depends on the Security Policy set in the MX-ONE Service Node.
• If the user enters the PIN code, the client (the IP extension) starts the TLS negotiation. After the session keys are established, the client sends the encrypted RRQ or Register. The server decrypts it and checks whether the correct PIN code is received.