If you have supported hardware, you can migrate directly from 4.1(3) to 7.1 using Data Migration Assistant (DMA).
The easier path; however, is to purchase at least a new Publisher (assuming your other servers can support the software installation to perform as Subscribers). From there, you would run DMA on your existing 4.1 server and import onto a new Publisher. This would mean new IP and hostname for the Publisher (which isn't a big deal). However, you would be able to easily back out given that the old 4.1 Publisher is still in place. Once the Publisher is in place and you are comfortable, you would ugprade your Subscribers.
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...