We have an intermittent echo problem on our IP phones at a particular site. I read in another post where the user corrected the problem by upgrading the IOS on the voice GW's.
I decided to start with the site router first and upgraded from Version 12.3(14)T7 to Version 12.4(19b). dspware version went from 4.4.708 to 4.4.26. Why did this downgrade? Is this a problem?
Before upgrading the IOS on the GW's which is also currently at 12.3(14)T7 I want to be sure I pick a known good IOS.
Any suggestions on an IOS would be nice?
Also an explanation of the above would be helpful?