Yealink SIP-T2 Series User Manual

Configuring Security Features
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To configure the server certificates via web user interface:
1. Click on Security->Server Certificates.
2. Select the desired value from the pull-down list of Device Certificates.
3. Click Confirm to accept the change.
To upload a server certificate via web user interface:
1. Click on Security->Server Certificates.
2. Click Browse to select the certificate (*.pem and *.cer) from your local system.
3. Click Upload to upload the certificate.
Secure Real-Time Transport Protocol (SRTP)
Secure Real-Time Transport Protocol (SRTP) encrypts the RTP 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 utilize
for the session is negotiated between the IP phones. This negotiation process is compliant with
RFC 4568.
When a user places a call on the enabled SRTP phone, the IP phone sends an INVITE message
with the RTP encryption algorithm to the destination phone. As described in RFC 3711, RTP
streams may be encrypted using an AES (Advanced Encryption Standard) algorithm.
Example of the RTP encryption algorithm carried in the SDP of the INVITE message:
m=audio 11780 RTP/SAVP 0 8 18 9 101
a=crypto:1 AES_CM_128_HMAC_SHA1_80 inline:NzFlNTUwZDk2OGVlOTc3YzNkYTkwZWVkMTM1YWFj

Yealink SIP-T2 Series Specifications

General

Brand	Yealink
Model	SIP-T2 Series
Category	IP Phone
Language	English