Grandstream UCM6100 User Manual for 1.0.9.25 - Manual (Page 242)

Firmware Version 1.0.9.25 UCM6100 Series IP PBX User Manual Page 241 of 303
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 75: UCM6100 Feature Codes] and [ENABLE SPY] section for instructions.