14.3.3.4.3. Security 
The security parameters are different for native SIP trunk profiles
and SIP-Q trunk profiles.
RTP security mode for SIP-Q trunk profiles
RTP security mode can be configured for SIP-Q trunk profiles. The
common gateway board does not support SDES, thus this menu is not offered.
If all conditions for SRTP are fulfilled, the payload is encrypted in
accordance with the configuration.
Security configuration for SIP-Q trunk
profiles
Security mode for native SIP trunking
For native SIP trunk the security mode is displayed. The security
mode is defined by the AMO TDCSU and the released security level of the
selected SIP trunk partner.
The common gateway board does not support payload security on the
native SIP trunk. If all conditions for security, signaling and/or payload
will be encrypted. The payload is encrypted with the tested and released
SDES mode.
Figure 249. Security configuration for SIP-Q trunk profiles
