Submit a ticketCall us

whitepaperYour VM Perplexities Called, and They Need You to Read This.

Virtualization can give you enormous flexibility with future workloads and can be a key enabler for other areas, like cloud computing and disaster recovery. So, how can you get a handle on the performance challenges in your virtual environment and manage deployments without erasing the potential upside? Learn the four key areas you need to be focusing on to help deliver a healthy and well-performing data center.

Get your free white paper.

Home > Success Center > VoIP & Network Quality Manager (VNQM) > VNQM - Knowledgebase Articles > Unable to see quality data for calls in VNQM

Unable to see quality data for calls in VNQM

Updated January 23rd, 2018

Overview

VNQM polls two types of call details:

  • CDRs (Call Detail Records) contain information about the call source and destination.
  • CMRs (Call Management Records) contain the call quality details. These details are provided by both endpoints that are involved in a call. Therefore, you can have up to two CMRs for a call: one describing the source endpoint connection quality, and the other describing the destination endpoint connection quality.

In some cases, you will not be able to see call quality data for one or both endpoints.

Environment

VNQM, all versions

Details

To see the quality data, you need to have a device that supports CMRs:

  • MGCP and SCCP devices typically support CMRs. For these endpoints, you can see the appropriate quality metric values in VNQM.
  • H323 and SIP devices do not support CMRs. For these endpoints, you'll see the the label "unsupported".

So, if one endpoint call supports CMRs and the other doesn't, you'll be able to see only one CMR.

 

Last modified

Tags

Classifications

Public