I have configured SRST on a cisco 2821 as follows
max-conferences 8 gain -6
ip source-address 172.28.91.254 port 2000
It is on a remote site. Now when i deleberately remove the route from the remote site edge router towards call manager, the phones are able to register in the SRST router. But when i call from a remote site to any of that registerd phone i get a fast busy tone.
In CCM there status is unable to register. The phones have get there IPs from local DHCP and are registering in the SRST router.
What abut TFTF ? My ccm is down in this case and it is the primary TFTP server. From where the phones will now get there config information ?