The SK-NIC enables a common communications and annunciation link to be created between up to 17 panels. A designated panel is configured as the communicator for all panels in the link for convenient single-point communications. The SK-NIC provides a common communications link for 6700, 6808, 6820 and 6820EVS panels. However, they cannot be linked together for peer-to-peer networking. The SK-NIC card comes standard with network connections using unshielded, twisted-pair, copper wire. For fiber optic networks, optional single-mode and multi-mode fiber-optic network add-on modules are available.