Don't quit understand this,
srst mode auto-provision none
srst dn line-mode dual
ip source-address <IP of CME>
Does it mean:
I do not need to configure ephone and ephone-dn, as the config will be download from the CCM in time of working condition.
When the connection broke, it will fallback to the config that it download from CCM previously.
What is the difference between this and call-manager-fallback ?