<?xml version="1.0" encoding="UTF-8"?>
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:xhtml="http://www.w3.org/1999/xhtml"
xsi:schemaLocation="http://www.sitemaps.org/schemas/sitemap/0.9
http://www.sitemaps.org/schemas/sitemap/0.9/sitemap.xsd">
<url>
    <loc>https://www.opalesystems.com/Home.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>1.00</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/About-Us.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.90</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/News.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.90</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Solutions.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.90</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Products.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.90</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Partners.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.90</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Tech-Blog.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.90</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Legal-Mentions.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.90</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/News/8-Opale-Systems-at-MWC-Barcelona-2026.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/News/7-Critical-Communications-World-%28CCW%29.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/News/3-Opale-Systems-at-MWC-Barcelona-2025.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/News/5-ETSI-MCX-PLUGTESTS-%28Texas-USA%29.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/News/6-Opale-Systems-member-of-SCS-Cluster.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/News/1-Opale-Systems-at-MWC2024.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Solutions/9-Voice-Quality-Testing-in-the-Lab.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.80</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Products/1-MultiDSLA.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.80</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Solutions/14-Drive-Testing.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.80</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Products/5-MetricServer.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.80</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Solutions/15-Voice-Service-Availability-Quality-Monitoring.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.80</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Solutions/16-Active-Testing-on-Mobile-Network.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.80</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Products/3-DSLA.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.80</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Products/4-VPP-VoxPort-Packet.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.80</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Solutions/17-MCPTT-Mission-Critical-Push-to-Talk.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.80</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Products/8-Opale-Smartphone-Superviser-OSS.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.80</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Products/29-MultiSAM.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.80</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Products/7-Opale-5G-Mobile-Robot.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.80</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Tech-Blog/66-A-clock-drift-study-in-Speech-Quality-Assessment-world.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Tech-Blog/64-An-Overview-of-MCX-Measurement-Needs.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Tech-Blog/62-Testing-analog-lines.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Tech-Blog/61-Speech-To-Text-and-IVR-testing.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Tech-Blog/60-POLQA-ndash-Notes-on-Odd-Behaviours-%28Part-2%29.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Tech-Blog/59-Need-to-test-your-MCPTT-%28Mission-Critical-Push-To-Talk%29-solution-including-latency.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Tech-Blog/58-What-does-VONR-stand-for-Voice-over-New-Radio.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Tech-Blog/57-MultiDSLA-reverse-management.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Tech-Blog/56-Metric-Server.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Tech-Blog/55-VoIP-tests-with-VPP-vs-VPP.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Tech-Blog/54-Voice-Quality-Management-as-a-Service.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Tech-Blog/53-Conference-bridge-availability-dashboards.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Tech-Blog/52-From-Small-Beginnings.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Tech-Blog/51-Case-Study-Tech-Giant.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Tech-Blog/50-Application-Focus-VPP-for-Enhanced-Voice-Services-%28EVS%29.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Tech-Blog/49-Customize-MultiDSLA-Results.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Tech-Blog/47-Application-Focus-Push-to-Talk-%28PTT%29.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Tech-Blog/48-Bring-the-Power-of-POLQA-PESQ-and-PEAQ-to-your-Quality-Optimization-Process.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Tech-Blog/44-Troubleshooting-Voice-Quality.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Tech-Blog/46-Case-Study-Tier-1-North-American-Mobile-Operator.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Tech-Blog/45-POLQA-vs-PESQ-ndash-ldquo-Why-does-PESQ-give-a-lower-score-rdquo.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Tech-Blog/42-Best-Practice-1-Monitor-your-WAN-Performance.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Tech-Blog/43-Voice-Quality-Assessment-for-VoLTE-Devices.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Tech-Blog/41-Know-everything-about-MOS-ndash-Part-3-Reference-Speech-Files.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Tech-Blog/40-Network-Engineers-Lose-The-Frustration-And-Regain-Visibility-and-Control.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Tech-Blog/39-POLQA-PESQ-ndash-Know-everything-about-MOS-ndash-Part-2.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Tech-Blog/37-Product-Qualification-for-Bluetooth-Audio-Streaming.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Tech-Blog/38-Know-everything-about-MOS-ndash-Part-1-Wait-which-MOS-exactly.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Tech-Blog/36-Malden-has-a-new-home-Opale-Systems.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Tech-Blog/35-Wideband-or-Narrowband.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Tech-Blog/34-Extending-the-Field-Test-Programme-Indoors.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Tech-Blog/33-Upgrading-to-Windows-10-Affects-Softkeys.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Tech-Blog/32-Measuring-Speech-Quality-across-Mixed-Networks.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Tech-Blog/31-POLQA-v2-4-ndash-Notes-on-the-Upgrade-rsquo-s-Behaviours-%28Part-2%29.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Tech-Blog/30-Tek-Signals-Appointed-as-Distributor-in-UAE.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Tech-Blog/29-A-look-at-Skype-VoLTE-%28Voice-over-LTE%29.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Tech-Blog/28-POLQA-v2-4-ndash-Notes-on-the-Upgrade-rsquo-s-Behaviours-%28Part-1%29.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Tech-Blog/27-Bluetooth-Link-Testing-with-a-MultiDSLA-System.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Tech-Blog/26-Step-Change-a-Test-Parameter-with-MultiDSLA-v5.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Tech-Blog/25-Test-Push-to-Talk-%28PTT-Test%29-and-PTT-over-Cellular.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Tech-Blog/24-Testing-Skype-trade-and-Other-VoIP-Clients.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Tech-Blog/22-HD-Voice.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Tech-Blog/23-4-and-6-Channel-DSLA-Now-Available.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Tech-Blog/20-Working-with-IVR-Systems.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Tech-Blog/21-Results-are-Portable-with-Speech-Performance-Viewer.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Tech-Blog/19-VoLTE-Anritsu-MD8475A-Signalling-Tester-and-MultiDSLA.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Tech-Blog/18-POLQA-Gets-the-Timing-Right.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Tech-Blog/17-Who-uses-POLQA-%28P-863%29.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Tech-Blog/16-Concilium-Technologies-appointed-as-Opale-Systems-Distributor-in-South-Africa.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Tech-Blog/15-POLQA-ndash-Notes-on-Odd-Behaviours-%28Part-4%29.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Tech-Blog/14-POLQA-ndash-Notes-on-Odd-Behaviours-%28Part-3%29.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Tech-Blog/13-POLQA-ndash-Notes-on-Odd-Behaviours-%28Part-1%29.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Tech-Blog/11-New-Features-in-MultiDSLA-ndash-Smartphone-Control.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Tech-Blog/12-Measure-Music-Quality-using-ITU-PEAQ.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Tech-Blog/10-Background-to-the-P-863-POLQA-Bug-Fixes.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Tech-Blog/9-Measure-cellphone-mp3-audio-performance.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Tech-Blog/7-Malden-at-4G-World-in-Chicago-25-27-October.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Tech-Blog/8-Malden-brings-POLQA-to-the-Toyo-Solutions-Fair-November-2011.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Tech-Blog/5-Monitor-a-DSLA-test-call-and-terminate-the-call-if-a-tone-is-detected.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Tech-Blog/6-Calibrate-levels-for-optimum-MOS.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Tech-Blog/4-Programmatically-start-a-test-in-5-easy-steps.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Tech-Blog/3-POLQA-added-to-MultiDSLA-v4-2.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Tech-Blog/2-PESQ-Perceptual-Evaluation-Speech-Quality.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
<url>
    <loc>https://www.opalesystems.com/Tech-Blog/1-Network-Testing-Quick-Start-Video-series.en.htm</loc>
    <lastmod>2026-04-03T00:25:08+02:00</lastmod>
    <priority>0.70</priority>
</url>
</urlset>