Security Features
421
Security->Server Certificates->Load Server Certificates File
static.server_certificates.delete
It deletes all uploaded server certificates.
Example:
static.server_certificates.delete = http://localhost/all
static.phone_setting.reserve_certs_enable
It enables or disables the IP phone to reserve custom certificates after it is reset to
factory defaults.
phone_setting.reserve_certs_config.enable
[2]
It enables or disables the IP phone to reserve the trusted and server certificates
settings after the phone reset to factory defaults.
0-Disabled, the values of the parameters “static.security.trust_certificates”,
“static.security.ca_cert”, “static.security.cn_validation” and “static.security.dev_cert” will
be reset.
1-Enabled, the values of the parameters “static.security.trust_certificates”,
“static.security.ca_cert”, “static.security.cn_validation”, “static.security.dev_cert” and
“phone_setting.reserve_certs_config.enable” will not be reset.
[1]
X is the account ID. For T54S/T48S/T48G/T46S/T46G/T29G, X=1-16; for T52S/T42G/T42S, X=1-12; for
T41P/T41S/T27P/T27G, X=1-6; for T40P/T40G/T23P/T23G, X=1-3; for T21(P) E2, X=1-2; for T19(P) E2, X=1.
[2]
If you change this parameter, the IP 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
interception 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 IP phones. This negotiation process is compliant with RFC 4568.
When you places a call on the enabled SRTP phone, the IP phone sends an INVITE message with the
RTP/RTCP encryption algorithm to the destination phone. As described in RFC 3711, RTP/RTCP streams
may be encrypted using an AES (Advanced Encryption Standard) algorithm.
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