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Model 2977 DialFire RAS overview 14
Model 2977 DialFire RAS User Manual 1 • DialFire Model 2977 RAS Adapters
Model 2977/B4 DialFire BRI RAS
The Model 2977 DialFire BRI RAS (see figure 1) 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, allowing up to eight simultaneous digital or analog remote access connections. 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).
Figure 1. Model 2977/B4 BRI RAS
DialFire adapters support a full range of connections, from low density analog modem, to medium density
Basic Rate Interface (BRI) ISDN, to high density T1/E1 and Primary Rate Interface (PRI) ISDN. Multiple
DialFire adapters can be installed in a single server so capability can be added as system needs grow.
Model 2977 DialFire T1/E1 RAS
Supporting open-standards remote access, fax, data collection, and modem pooling, the Model 2977 DialFire
RAS server-based RAS (see
figure 2) provides up to 60 ports in a single PCI slot.
Figure 2. Model 2977 T1/E1 RAS
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’s Model
2977 DialFire RAS.
The Model 2977 DialFire DSP-based RAS concentrator support a full range of connections, from low density
to high density T1/E1 and primary rate interface (PRI) ISDN. Multiple Model 2977 DialFire adapters can be
installed in a single server so capability can be added as system needs grow.