H3C Technologies H3C MSR 50 - Manual (Page 719)

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Figure 728 Network diagram
Configuration procedure
# Enable the SIP trunk function. (Details not shown.)
# Create SIP server group 1. Add two SIP servers into the server group: the IP addresses are 10.1.1.2 and
10.1.1.3, and the server with the address 10.1.1.2 has a higher priority value. Enable the real-time
switching function of SIP server group 1. Set the keep-alive mode for SIP server group 1 to Options.
1. Select Voice Management > Call Connection > SIP Server Group Management from the navigation
tree and click Add.
IP
SIP trunk device 2000
SIP server
SIP trunk
Router A
Enterprise private network
ITSP-A
Router B
1000
Public network
10.1.1.2/24
1.1.1.1/24 1.1.1.2/24
2.1.1.1/24 2.1.1.2/24
SIP server
10.1.1.3/24