H3C Technologies H3C MSR 50 - Manual (Page 691)

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b. Click Apply.
Verifying the configuration
After the above configuration, when you use telephone 1111 to call telephone 2222, the calling number
1111 will not be displayed on telephone 2222.
Configuring SRTP for SIP calls
Network requirements
Two routers Router A and Router B work as SIP UAs. It is required that SIP calls use the SRTP protocol to
protect call conversations.
Figure 694 Network diagram
Configuration procedure
1. Configure basic voice calls, see " Configure basic voice calls: configure a local number and the
call route to Router B. "
2. Specify SRTP as the media flow protocol for SIP calls:
# Specify SRTP as the media flow protocol for SIP calls on Router A and Router B.
Select Voice Management > Call Connection > SIP Connection from the navigation tree, and click
the Session Properties tab to access the media security configuration page as shown in
Figure
695 .
Figure 695 Configuring media security
a. Select SRTP for Media Protocol.
b. Click Apply.
Verifying the configuration
SIP calls use the SRTP protocol to encrypt and authenticate media flows, and call conversations are well
protected.
Configuring TCP to carry outgoing SIP calls
Network requirements
Two routers Router A and Router B work as SIP UAs. It is required that SIP calls between the two parties
be carried over TCP.