I have problem with NM-HDV-1E1-30. When i put NM-HDV-1E1-30 in production with hardware revision number 1.0 Board Revision : G0 then voice calls works fine, but when insert new NM-HDV-1E1-30 with hardware revision number 1.1 & Board Revision : H0 intermittent issues occurs like some of calls work smoothly. And we need to try 2-3 times to make a single call.
What is the difference between these two hardware versions. why voice doesn;t work on higher revision number.