I've been having some issues with the quality of voicemail recordings and in the process of troubleshooting I noticed that 1 of my 2 spa400's when sent a large number of pings (extended ping) from a cisco IOS device does not respond to many of them but the other of the 2 spa400's responds to all of them. The spa400 running as the voicemail server is the one that shows lots of lost pings. I am sending 8000 pings (extended ping option in IOS) of length 1421 waiting 8 seconds for timeout. The loss can be 3% or higher when pinging the spa400 running as the voicemail server, but 0 % when pinging the spa400 with just phone lines attached. Neither spa400 is being accessed via the web mgmt page nor has any phone calls being processed on it at the time of the testing.
My question is whether it is normal for a spa400 to not respond to large sized pings in a large volume when running the voicemail application or if I should continue to troubleshoot the situation with the spa400 further? Thanks.