What does performance monitoring say on the UM servers? Are you using managed switches? If so, what are the error counts/rates on the switchports? If not, what are the (less reliable) error counts/rates on the perfmon NIC objects?
From: Anthony Goraczko [mailto:[email protected]] Sent: Thursday, March 15, 2012 5:28 PM To: MS-Exchange Admin Issues Subject: Exchange 2010 Unified Messaging Jitter Issue Recently we have experienced stuttering, drop outs, and audio loops when users are either leaving messages or checking messages. Our Voice Services team recently moved from software MTPs to hardware MTPs due to an issue with another voice-related product. Those issues were sorted out and now everything is stable again except for the jitter issue with voicemail. They initiated a call with Cisco support and did Wireshark traces on their end and we have done Microsoft Network Monitor traces on our end. We have also asked the Networking team to monitor the performance of the hardware in between the two environments. As far as we can tell from the traces and the monitoring, the problem lies with the Exchange UM servers. In the traces it's apparent that the jitter occurs on the server side. Can anyone offer any insight into why we may be experiencing this issue? Here are the server and software specs (we have 2 identical physical boxes both running only the UM role): Hardware 4x 6-core 2.66GHz processors 16gb RAM 2x RAID10 volumes on 15K disks - OS on one, application on the other 2x Broadcom 1Gig NICs configured in a NIC team using Broadcom software Software Win2008R2 RTM Exchange 2010 SP1 RU2 Thanks, Anthony Anthony Goraczko University Technology Services Division of Information Technology Florida International University https://mysites.fiu.edu/sites/anthony/ --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to [email protected]<mailto:[email protected]> with the body: unsubscribe exchangelist --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to [email protected] with the body: unsubscribe exchangelist
