IP Office supports Quality of Service (QoS) monitoring for extensions. System Status displays the current quality of service for a call on the extension's Extension Status form. It displays the information for Avaya H323 IP phones registered with the system. It also displays information for other extension when their call involves a VCM channel.

The thresholds for quality of service alarms are set within the system configuration. Separate thresholds are set for Round Trip Delay (default 350ms), Jitter (default 20ms) and Packet Loss (0.5%). At the end of a call segment that exceeds any of the thresholds, the system outputs a QoS alarm containing details of the call and the maximum value of each of QoS measurement during the call.

For calls held or parked and then resumed, separate QoS alarms are output for each segment of the call. If the call involves several extensions, the system outputs separate alarms for each extension.

The QoS measurements shown by SSA are not full end-to-end call quality measurements. Whilst they can indicate potential problems, more accurate assessment requires the use of network monitoring tools such as Wireshark. Problem escalation to Avaya require a full network assessment as QoS issues can arise from a range of network factors other than the IP Office system.