A–4ROLMphone 300/600 User GuideClass of Service Changeover•To restore your phone’s primaryCOS•To return your phone’ssecondary COSCommunity (Com) GroupSpeaker CallConference•To remove the last party•To remove a specific partyDirect Trunk SelectForwarding, FixedForwarding, Fixed - CancelForwarding, Variable - AllForwarding, Variable - BusyForwarding, Variable - Busy orRing No Answerthrough