### About the DataFire RAS B4STU Family

#### Introduction

The four-port, PCI-compliant DataFire RAS B Series adapters provide remote access servers (RAS) with ISDN basic rate interface (BRI) connectivity. Each port provides a BRI connection that supports the following types of calls:

- Two ISDN B and one ISDN D-channel

- 56 Kbps analog modem (both K56flex and V.90)

- Fax

#### ISDN Interfaces

The DataFire RAS B Series comes with either:

- An S/T interface, which requires an external NT-1 or

- A U interface, which provides an integrated NT-1

#### Adapters Per Server

Up to four DataFire RAS B Series adapters may be installed on the same server, providing up to 8 ISDN B-channels.

#### Operating System Support

Drivers are available for Windows NT 4, SCO UnixWare, Linux, and Novell Netware.