A full-featured, digital telephone with full-duplex speakerphone for power users and areas where call coverage is required. optiPoint 500 Standard also offers an integrated USB jack for low-cost CTI connections without the need for additional modules or Adapters, and 12 keys with LEDs to indicate line or feature status. One modular adapter bay for Easy-add Adapters makes it easy to add a headset, ISDN connectivity, or a second digital phone or analog device.