Aastra 650c User Guide Aastra 650c for Aastra 400 - Page 68

Supplementary features When the call is answered on the destination phone, a call is set up: one-way (connection only from the monitoring to the destination phone) or two-way (mutual call connection during 1minute in hands-free mode). Provided the call connection is not previously terminated neither on the monitoring nor on the destination phone, the connection will automatically be terminated after 1 minute. The microphone for room monitoring is reactivated after 1 minute and a call only triggered when the configured level is again exceeded. When the destination phone is busy, the microphone for room monitoring is reactivated after 15 seconds. When the destination phone does not answer, the call is terminated and the microphone for room monitoring is reactivated after 1 minute. A call is only triggered again when the configured level is again exceeded. When the monitoring phone receives an internal or external call from another phone as the destination phone, this call is only visually but not acoustically signalled. You can answer the call on the monitoring phone. You can also make a call on the monitoring phone. Once the call has been terminated, the monitoring phone immediately switches back to monitoring mode. Please note that room monitoring is deactivated as long as the monitoring phone is called or is in a call connection. Avoid these monitoring gaps by activating a call forwarding on the monitoring phone. A verification call of the destination phone is yet possible with call forwarding. Room monitoring mode: • Active room monitoring with one-way call connection. • Active room monitoring with two-way call connection. • Passive room monitoring (Listen only). Notes: • The reliability of the room monitoring depends on the quality of the radio connec- tion. • Extraneous noises in the monitored room call lead to false calls. • Therefore no liability can be assumed for failed monitoring calls or for false calls. Passive room monitoring: You can also listen into the monitored room using a verification call. Call the monitoring phone from the destination phone. When the destination number is an external call number, CLIP may not be suppressed. The monitoring phone answers the call automatically and without acoustic signalling and sets up a one-way or two-way call connection depending on the settings. This is possible even if a call forwarding is activated on the monitoring phone. 68 Aastra 650c eud-1587/1.0 - R3.0 - 04.2013