There are a few voice quality bugs on in firmware. You can do a search for various tags in the forums and you'll come across several. I recommend upgrading to something post 8-5-3 (I believe a number of fixes were noted in that revision) and then just run it individually on a few phones to see if that clears up your issue.
If not, we can help you go from there. It could be a bug, it could also be a volume issue...sounds funny but true.
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...