For your CCNA-Voice-preparation I would suggest to use a 15.1(1)T release on the router. This gives you CME 8.0 which matches the version used on the exam. Also load the corresponding CME-software into your router.
For your preparation you can also use the CCNA-Voice course from INE. There are about 25 hours of free video that you can watch on this topic after a registration:
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...