Grandstream Networks UCM6202 User Manual page 260

4. Enable or disable "Require Confirmation" option. If enabled, the confirmation of the invited monitor's
extension is required before the active call can be monitored. This option can be used to avoid adding
participant who has auto-answer configured or call forwarded to voicemail.
5. Click on "Add". An INVITE will be sent to the monitor's extension. The monitor can answer the call and start
monitoring. If "Require Confirmation" is enabled, the user will be asked to confirm to monitor the call.
Another way to monitor active calls is to dial the corresponding feature codes from an extension. Please refer to
[Table 81: UCM6200 Feature Codes]
and section for instructions.
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