Interlogix CDC4 Installation And Programming Manual page 68

Chapter 2: System functions
Once set, the encryption key on an OSDP reader cannot be changed by
changing the encryption key for the bus. To reset the encryption key used by an
OSDP reader, the reader must be changed to Install Mode.
Aperio
The CDC4 door controller supports Aperio protocol.
Note: Aperio protocol has a fixed baud rate of 19200 baud.
SALLIS
The CDC4 door controller supports SALLIS protocol.
Note: SALLIS protocol has a fixed baud rate of 38400 baud.
62 CDC4 Door Controller Installation and Programming Manual