Keys Fitness GSM/GPRS Compact Flash Card RTM-8000 - Manual (Page 64)

Using the RTM-8000 54
Conference call
To establish a conference call in a multi-party call, tap
Conference in the
Call State window.
Private call
During a conference call, tap to select a calling party and tap
Private in the
Call State window. With this function, you can talk to the calling party
you selected without being heard by the other calling parties.
To return to the conference call, tap Conference .