The IS-SS-HID-I is an audio-only door station for the IS system, with a built in HID® iCLASS card reader. The audio door station can be connected via CAT-5e/CAT-6 wire to any of the following IS exchange units: IS-CCU, IS-SCU, or IS-RCU. Maximum distance from the door station to the exchange unit is 980'. Wiring and power for the card reader are separate from the intercom wiring. The card reader is to be connected to a host controller of any type that is compatible with the HID® iCLASS R10 (Rev.C) smart card reader.