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ReliaTel Operator TrainingRelease 4.1.1Voice Quality Dashboard Training - Version 1.0
Voice Quality (VoIP) Data • VoIP data collection – levels • Center • General measure of the overall VoIP quality of service for your network at that node • Collector • Detailed analysis of individual calls • VoIP data • RTCP – Real Time Control Protocol • Capability to monitor RTP (Real Time Transport Protocol) • Protocol used to evaluate VoIP transmissions • Passive QoS for other vendor collectors • Alarms • Alarming optional • Severities – CRI, MAJ, MIN, FYI • Alarming and QoS analysis • Alarm List - Alarms are displayed here, with other entity alarms • Voice Quality dashboard - QoS analysis is displayed in this dashboard
Voice Quality Data (cont.) • VoIP Metrics • MOS (mean opinion score) • Industry standard scale equating voice quality to perception by the human ear • Good - 4 and above • Fair – 3.6 – 3.9 • Poor – 3.1 – 3.8 • Unacceptable - <3.1 • Latency • Time it takes a voice packet to traverse the network • Jitter • Excess variation in voice packet transmission from a standard interval • Loss (network loss, total loss, packet loss) • Voice packets lost during transmission • VoIP metric alarm rules initiated by the ReliaTel Administrator
Center Performance Dashboard • VoIP data by center
Center Performance Dashboard Portlets • User Experience by Collector • MOS scores only • Collectors with the worst average MOS scores • QoS Alarms • Counts number of active and acknowledged alarms • Analyzed by: • Collector • Alarm type • Collector QoS Performance Metrics • All collectors in the selected center or subcenter included • All RTCP/CDR metrics reported • Bad Streams = < 3.6 MOS • Endpoint QoS Performance Metrics • All RTCP/CDR metrics reported • Bad calls = < 3.6 MOS • Maximum 25 worst-performing endpoints, based on average MOS score
Center Performance Dashboard – Additional Info • Data displayed • Snapshot of the last 60 minutes • Data is static • Refreshing the dashboard displays another 60 minute period of data • Refresh options • Browser • Refresh button • Calls and Streams • The terms ‘calls’ and ‘streams’ appear in the interface • A call includes both sides of the voice transmission. This occurs between two endpoints; data is collected for both directions. • A stream is one side of a call; the QoS evaluation is for one direction only, between endpoint 1 and endpoint 2. • Endpoint QoS metrics • The metrics displayed in the interface are for the QoS evaluation for the call being received • QoS metrics reported for endpoint 1 are the metrics for the stream being received from endpoint 2.
Center Performance Dashboard – View by Type • View by options (type and device) – RTCP, PQoS, CUCM, Lync, All • View by device - CUCM and Lync
Collector – Scatter Plot Dashboard • Open from collector fly-out menu
Call Scatter Plot Dashboard (cont.) • Displays individual streams as plots on a graph • Average MOS score of stream determines location on graph • Stream status • Active stream – circle • Completed stream – diamond
Collector – Scatter Plot with Details • Draw selection box and click View Details Selection box Detailed call metrics from selected box
Collector – Scatter Plot with Details (cont.) • Call Details table • Open from Scatter Plot; QoS data in tabular format • Drawing a selection box on the graph selects streams for the Call Details table • Expanding the dashboard – loss of functionality • In expanded state View Details button and selection boxes are hidden • Call Details table cannot be opened when expanded
Collector – Live View Dashboard for VoIP Collectors • Open from VoIP collector fly-out menu • Note: Lync and CUCM collectors – live view not available; completed calls only
Live View Dashboard – VoIP Collectors • Six separate graphs • Four QoS graphs • MOS • Latency • Jitter • Loss • Two non-QoS graphs • Total number of streams being analyzed • Number of alarms • Data flow • Data is live; continuous streaming (not 60 minute ‘snapshot’) • Plot window is approximately 18-20 minutes • Single collector (not center or subcenter) • Continuous streaming • Buffer (Pause) • Back fill when streaming resumes
Collector – Active Calls Dashboard • Open from VoIP collector fly-out menu – active and completed calls • Open from Lync and CUCM collectors – completed calls only
Active Calls Dashboard • Dashboard tracks ongoing, active calls and calls completed for VoIP collectors; omits active calls for Lync and CUCM collectors. • Dashboard time period - last 60 minutes from time when dashboard was opened • Each call is a single row • Refresh option • Ranges from Never to 60 minutes • Setting automatically refreshes the data, manually refreshing is not necessary
Active Calls Dashboard (continued) • VoIP - drill down from an active or completed call record • Lync and CUCM – drill down from a completed call record
Active Calls Dashboard – Call Summary • Call Summary page • Top section– Call Summary • Active call (VoIP) - Basic QoS metrics • Completed call (VoIP/Lync/CUCM) - Expanded QoS metrics • Bottom section – Call Path/Call Details Records • Route (IP addresses) a call takes between endpoints
Active Calls Dashboard – Live View – VoIP Collector • Live View page • Open from an active call in the Active Calls dashboard • Four QoS charts • MOS, Latency, Jitter, Loss • Trend lines track metrics for each endpoint (not Min/Max or Max/Avg) • Call Path details – measures round trip for packets
Active Calls Dashboard Filter – VoIP Collector • Call filter • Active Calls dashboard shows only this call • Right click on call to open Call Summary or Live View for that call • Click the ‘Clear Filter’ icon to return to the full active calls display
Printing and Saving Dashboard Graphs/Charts • Printing a graph/chart • Right click on the graph and select Print Chart • Saving a graph/chart • Right click on a graph and select a file format • Live View charts cannot be saved
Dashboard Management Techniques • Opening center and collector views • Left-click – tab replacement • Right-click – opens new tab, existing tab(s) still displayed • Tab management • Close tab • Save tab • Open tab in new browser window • Additional management techniques (for tables) • Split-column menu • Filter (upper right corner of window)
Drill-down Techniques from Performance Dashboard • From the Collector QoS portlet Right-click – VoIP – as shown Right-click – Lync/CUCM – Scatter Plot only Left-click – VoIP/Lync/CUCM
Drill-down Options from the Performance Dashboard • From the Endpoint QoS portlet Left-click: Endpoint Scatter Plot Left-click: Collector Scatter Plot
Drill-down Options from the Performance Dashboard • From the Endpoint QoS portlet • Scatter Plot – VoIP/Lync/CUCM • Live View and Traceroute - VoIP collectors only Right-click: Source Endpoint menu Right-click: Collector