On the alarm panel you will find the encryption settings under:
Installer Mode -> Communications -> ESCC Reporting -> Recipient -> IP Recipient 1/2
Receiver
IP Port Number
Key length
None
128 bit
192 bit
256 bit
Key
Note
The menu item does not appear when "None" is selected for the key length.
128 bit has been selected as the key length.
0000 0000 0000 0000
Configuration
209