Products  >  Model 2977/B4 RAS View Printable
This legacy product is not recommended for new installations. There is no replacement for these products.

The Patton DialFire™ Model 2977 BRI RAS is the ultimate WAN adapter card for use with BRI lines. It is designed to work in a standard PCI 2.1 slot (5.0 or 3.3 volts) and can terminate four BRI communication lines. Calls can be originated and answered on all 8 channels (2 each for all 4 BRI connections). All channels can handle modem calls (up to 56 kbps—V.90 and K56flex) and B channel calls (64 kbps).

The Patton Model 2977 DialFire Family of DSP (Digital Signal Processor) based RAS (Remote Access Server) concentrator adapters provides the widest compatibility and most powerful performance available in a PCI slot. For demanding, server-based applications including modem-pooling, remote access, advanced fax, World Wide Web and branch office internetworking, you won't find a better product line than the Patton 2977 DialFire RAS.

Finding a remote access solution that meets the needs of a small office environment is often a challenge. With Patton's 2977/B4 RAS the solution is easy! It's as simple as adding an adapter to your favorite PC server, installing the device driver and configuring your remote access ports. The users can dial-out of your server while other users are dialing-in. The Patton 2977/B4 is a digital adapter that provides connections to four ISDN BRI (Basic Rate Interface) lines allowing up to eight simultaneous digital or analog connections.

  • Dynamic analog/digital/fax support—On-board DSPs provide advanced modem & fax support and maximize the efficiency of each communication channel
  • Multi-function ISDN RAS—4 BRI interfaces for up to 8 chassis
  • Advanced DSP Technology—Supports V.90, K56Flex, ISDN, and Advanced FAX applications
  • Wide OS and third-party application support—The Model 2977 DialFire RAS integrates with, and take advantage of, the inherent communications capabilities built-into Microsoft, Novell, SCO, and Linux server operating environments

    The following operating systems: Novell Netware, SCO OpenServer5, and SCO UnixWare are not supported by Patton's RAS Engineering & Technical Support Teams although legacy Digi International drivers are available from Patton's software Upgrade Site. For additional information, contact
  • Universal server compliance—The Model 2977/B4 DialFire RAS operates within the PCI 2.1 mechanical and electrical specifications, support 3.3 or 5-volt PCI servers, and share common software architecture


Ordering information for this product is not publicly available at this time.
Please accept our apology as we regret any inconvenience to you.

For more information
about the availability of this product and/or alternative solutions,
please contact Patton's Product Management team at or +1 301 975 1000

Sales: / +1 301 975 1000
Support: / +1 301 975 1007
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