Hayes
The ITT Hayes MDSM-25PE-Z7 is a 25-line basic rate ISDN service device. It is designed to be used either in a corporate office, or as a part of a large-scale ISDN network. It features a built-in power supply, and a modem port for connection to the public ISDN network. It also features a multi-function switch, allowing it to connect up to 25 lines, as well as allowing the user to control incoming and outgoing calls using predefined profiles. The MDSM-25PE-Z7 also includes data buffering, allowing users to store and forward messages when an ISDN connection is not available. Its user-friendly setup allows for quick and easy access to the ISDN service, even for those who are not familiar with ISDN programming.