This is the description of the Encryption mute as found on the PPS
Encrypted Voice Messages
Encrypted Voice Messages
- Definition When receiving an encrypted message: 1. Enable: 1a. If you do not have the encryption key, Pager will play unrecognizable data tones.
1b. If you have the encryption key, Pager will use the key to decrypt the voice and play the voice.
1c. If the encryption key is wrong, Pager will play unrecognizable data tones. 2. Disable(Default): Pager will ignore the received voice message This setting is only related to encrypted messages. Regardless of the setting, Pager will play the received unencrypted voice messages.