Mini pabx Capacity: Basic 4 CO lines, 8 extensions (408),expand to 416, 424,432 ... ,832,896,1288,1696,1680 Transfer caller ID Mini pabxCapacity: Basic 4 CO lines, 8 extensions (408), expand to 416, ... reportingFlash time choiceRinging assignmentCall restrictionThree way conferenceCall all extensionsSpecific CO line dialingRing identifyCO line bookingCO line reservationOperator settingCO line monitor ...