Secure Real-Time Transport Protocol (Srtp) - Yealink SIP-T5 Series Administrator's Manual

Administrator's Guide for SIP-T2 Series/T4 Series/T5 Series/CP920 IP Phones
Default Blank
Parameter static.server_certificates.url
It configures the access URL of the certificate the phone sends for authentication.
Description
Note: The certificate you want to upload must be in *.pem or *.cer format.
Permitted
URL within 511 characters
Values
Default Blank
T57W/T54W/T53W/T53/T48U/T46U/T43U/T42U:
Security > Server Certificates > Upload Server Certificate File
Web UI
Other Phones:
Security > Server Certificates > Load Server Certificates File
Parameter static.server_certificates.delete
Description It deletes all uploaded server certificates.
Permitted
http://localhost/all
Values
Default Blank
Parameter static.phone_setting.reserve_certs_enable
Description It enables or disables the phone to reserve custom certificates after it is reset to factory defaults.
Permitted 0-Disabled
1-Enabled
Values
Default 0
static.phone_setting.reserve_certs_config.enable
Parameter
[3]
It enables or disables the phone to reserve the trusted and server certificates settings after the phone
Description
reset to factory defaults.
0-Disabled, "static.security.trust_certificates", "static.security.ca_cert", "static.security.cn_validation"
and "static.security.dev_cert" will be reset.
Permitted
Values
1-Enabled, "static.security.trust_certificates", "static.security.ca_cert", "static.security.cn_validation",
"static.security.dev_cert" and "static.phone_setting.reserve_certs_config.enable" will not be reset.
Default 0
[1]
X is the account ID. For T57W/T54W/T48U/T48S/T48G/T46U/T46S/T46G/T29G, X=1-16; for
T53W/T53/T43U/T42G/T42U/T42S, X=1-12; for T41P/T41S/T27G, X=1-6; for T40P/T40G/T23P/T23G, X=1-3; for T21
(P) E2, X=1-2; for T19(P) E2/CP920, X=1.
[2]
Y is the server ID. Y=1-2.
[3]
If you change this parameter, the phone will reboot to make the change take effect.

Secure Real-Time Transport Protocol (SRTP)

Secure Real-Time Transport Protocol (SRTP) encrypts the audio streams during VoIP phone calls to avoid inter-
ception and eavesdropping. The parties participating in the call must enable SRTP feature simultaneously. When
this feature is enabled on both phones, the type of encryption to use for the session is negotiated between the
phones. This negotiation process is compliant with
113
<y0000000000xx>.cfg
<y0000000000xx>.cfg
<y0000000000xx>.cfg
<y0000000000xx>.cfg
RFC 4568.