The CR8N (Code Receiver) card can be used as an option in all HiPath 3750 and HiPath 3700 enclosures and slots. The CR8N card is required in the following cases ? high load of outgoing traffic and many analog subscriber connections ? connecting a Hicom Phonemail system with more than 6 ports and the Automatic Attendant function ? Connecting an external Automatic Attendant as a virtual operator and many analog trunks. Siemens telephone system: • Siemens HiPath 3700 • Siemens HiPath 3750