We have a dedicated call center in our hospital. We are using a IP PBX software from a outsourced vendor. The software is installed in our PCs to attend the enquiry calls.The client pcs using in call center is a data vlan in one of the access switch. The server IP PBX software is installed in data center server farm switch. For the past weeks, the software was having some issues at some time, when i checked with the vendor they said software side is ok upon checking on wireshark logs. They have made several observations & fixes -
Key Observations:
Wrong Sequence Number (Red Entries) - RTP packets are arriving out of order or being lost, likely due to network congestion or QoS issues.
High Jitter Values (Max: 7.03 ms) - Increased jitter can degrade voice quality, causing choppy audio or lag.
Packet Loss (0.00%) - No significant packet loss was observed, but sequence errors suggest potential packet reordering.
Clock Drift (-79 ms) - A lack of synchronization between sender and receiver clocks can impact audio quality.
Cause - Solution.
Network Congestion - Prioritize RTP traffic using QoS settings on the firewall or router.
Jitter & Delay - Implement jitter buffers or increase buffer size in VoIP settings.
Packet Reordering - Check network routing and MTU settings to prevent out-of-order delivery.
Clock Drift - Ensure both endpoints synchronize time using NTP.
Pls help me what to do from the core switch side or on the access switch side.
NOTE- When I checked the ping status from the client PC to Server IP there is no drop or that much latency.
Core switches are CISCO 4506 model
Access switch for call center department is Aruba Instant ON 1930 model.
Key Observations:
Wrong Sequence Number (Red Entries) - RTP packets are arriving out of order or being lost, likely due to network congestion or QoS issues.
High Jitter Values (Max: 7.03 ms) - Increased jitter can degrade voice quality, causing choppy audio or lag.
Packet Loss (0.00%) - No significant packet loss was observed, but sequence errors suggest potential packet reordering.
Clock Drift (-79 ms) - A lack of synchronization between sender and receiver clocks can impact audio quality.
Cause - Solution.
Network Congestion - Prioritize RTP traffic using QoS settings on the firewall or router.
Jitter & Delay - Implement jitter buffers or increase buffer size in VoIP settings.
Packet Reordering - Check network routing and MTU settings to prevent out-of-order delivery.
Clock Drift - Ensure both endpoints synchronize time using NTP.
Pls help me what to do from the core switch side or on the access switch side.
NOTE- When I checked the ping status from the client PC to Server IP there is no drop or that much latency.
Core switches are CISCO 4506 model
Access switch for call center department is Aruba Instant ON 1930 model.