ST/SR- AiphoneLEF-x, card is designed specifically to work seamlessly with the Aiphone LEF and LEM series intercom systems on one multi-mode or single-mode optical fiber. The card features one bi-directional channel of intercom-compatible fiber optic audio and two bi-directional contact closures for push-to-call and gate or access control. DigiSlim product family is available as rack mount cards and modules that can be installed in any of Meridian’s desk chassis or in 19-inch racking frames. This system can be configured in either star (module to rack) or trunking (rack to rack) configurations. These systems can be transformed in to a standalone module by utilizing an SR-500 (standard configuration) or an SR-1001 subrack frames.