Your internet firewall should not be between your phones/Callmanager and the PSTN. What are you using for PSTN access (PRI, FXO, etc.)? Is it possible that you are using the capacity of your PSTN access?
The phones and Callmanager should be behind the router, but traffic destined for the PRI is not being filtered by firewall rules. One quick way to look at the number of active calls is to issue the "show call active voice compact" command on the router. You can also use the RTMT anc CAR tools to look at usage statistics for the gateway.
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...