Nortel SMC 2450, Руководство по внедрению

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Secure Multimedia Controller Implementation Guide
Geographic redundancy
The general location of the SMCs in the geographically redundant
installations is shown in Figure 8. Note that each site has a high availability
SMC setup, consisting of an active and a backup device. On a geographic
failover from the primary CS 1000 to the secondary, the traffic is redirected
to the second SMC cluster. The IP phones re-establish a secure UNIStim
connection with the SMC before access permission is granted to the CS 1000
signaling servers.
Figure 8
Geographic redundancy
Secure UNIStim keys
Because the IP phones have limited space to store Secure UNIStim
fingerprints, the private keys on the two SMC clusters must be defined
appropriately.
If the IP phones support two fingerprints, the two SMCs can have different
private fingerprints; however, automatically generating two private