Modems that work with NCID:
    Modems that work for NCID are modems that support Caller ID and
    work with the Operating system (Linux, FreeBSD, Macintosh)

Incomplete list of working modems:

    Robotics USB modem, part number USR805637 using Fedora and the
    UK British Telecom caller id system

    DUALCOM Technology USB Adapter/Modem for Caller ID Display
    http://www.dual-comm.com/USB_Caller_ID_Modem.htm using US
    Caller ID system.

    Phoebe FAX MODEM Model CMV1456VQE serial port external modem
    using US Caller ID system.
