Help > Using the Phone > Settings > Identities > Options for experts > Security
Security
SIPS active
Enables the encrypted transfer of signalling data.
*Further help under SIPS
*Further help under Certificate
*Further help under Identities
Peer-to-peer TLS
Forces the encryption of SIP messages over the entire route to the destination.
*Note: The call is not made if TLS is not available on the entire connection.
*Further help under Identities
SRTP
Transport protocol for encrypted connections.
Mandatory
This setting forces voice encryption to be on. If the voice partner (VoIP provider, PBX, external VoIP subscriber) does not support SRTP, the connection is not established.
Preferred
Switches on negotiation for the encryption of call data via SRTP. When a call is made, the call partner will be asked if encryption is possible. If selected, voice data is transmitted in encrypted form. If not selected, it is not encrypted.
Disabled
This setting forces voice encryption to be off. If the voice partner (VoIP provider, PBX, external VoIP subscriber) does not support encryption, the connection is not established.
*Further help under SRTP
*Further help under Identities
Certificate
If the SIPS function is activated, the system checks whether the certificate belongs to the domain/IP.
*Note: For each device variant, simply shows whether a certificate is installed and where processing can take place, if relevant.
*Further help under Identities
*Further help under Certificate