You are actually also required to specify the number of Cisco IP phones supported by the router (done with the "max-ephones" command) and the number of directory numbers supported by the router (done with the "max-dn" command).
You'll also probably want to configure dial-plan patterns for incoming calls and transfer patterns and a voicemail number for forwarding to voicemail, but these are optional and only required if you want additional features.
Another question for you, if your phones are setup with Static addressing, how does the phone rehome to the SRST router? I have SRST setup and the phones do not rehome to the router when CM is down. I have setup and had SRST working properly but have always used DHCP from the router and applied the IP via the MAC and then failover worked fine. I have tried creating a 'virtual' CallManager and included it within the cluster in CM and the phones then rehomed but kept bouncing.
dhcp has nothing to do with the phones registering with the srst gateway. as long as they are statically or dynamically configured with the default gateway being that srst router they will register if you have it configured correctly.
I'm not able to access my old voice mail messages all of a sudden. The recording says something like 'the message is currently not available'. This has never happened before in all the years I have been using this system. I have t...
If you have 2 ISR routers, one acting as Failover, do we need to have both the same number of SRST licenses on the 2 routers?
No. You will only need the SRST licenses on the primary router. Because this feature...