Frame Relay Broadcast Polling FRAD

SR-BPF Async FRAD designed for polling networks

  • Allows async multipoint polling over frame relay networks
  • Async RS-232 interface up to 57.6
  • Sync RS-232 composite to 128 kbps
  • Use for SCADA, financial, traffic control networks
  • Internal DSU option
  • Simple to configure for polling protocol and address mapping
  • Often more cost effective than multipoint polling modem networks
  • Supports 160 remotes per master FRAD


The Broadcast Polling FRAD (BPF) is a FRAD (Frame Relay Access Device) for frame relay networks that will accommodate most byte oriented async polling protocols and allow those protocols to be transported over a synchronous frame relay multi-point network. The BPF encapsulates async polling protocols into frame relay format for private or public frame relay networks.

The BPF is easily configured. A host BPF port is simply mapped to the remote DLCIs that will receive the host polling data. No knowledge of the systems internal polling protocols is required.

The BPF makes it easy to convert async polling networks from multi-point modems to frame relay. Fast polling modems are disappearing from the market place at the same time async polling systems are requiring more bandwidth as their requirements move from 1200 to 9600 bps and faster. As remote terminal units become more capable, more data must be exchanged from the host to the remote units for financial, traffic and SCADA networks. The BPF is the ideal product for this requirement. It supports async port speeds up to 57.6 Kbps and synchronous frame relay composite speeds to 128 Kbps.

The BPF is often more cost effective than analog high speed fast polling modems. Frame relay networks are becoming less expensive than analog multipoint networks, and the DSUs are less expensive than high speed fast poll modems, even in combination with DCBs SR-BPF. The hardware cost savings alone provide a compelling reason to use the BPF.

An internal DSU is also available for the BPF, as well as for the remote units, which are the DCB SR-01-BPF frame relay units. With an internal DSU, you get the entire package in a single enclosure.


Indicators (front panel)
Power, Activity, Line Error, Modem Ready, Option, Port 1 Setup
Network Management Port
Interface: CCITT V.24, RS-232-D
Connector: RJ-45 (8-wire)
Can be mapped to Port 1
Network Management Port to terminal cable included
Data Port
Power requirements: 120 VAC, 18 Watts, 60 Hz wall mount power supply, (220 VAC supply available)
1 Pound
101/4" x 93/4" x 21/4"
56 Kbps internal DSU/CSU 12 VDC, 24 VDC, 48VCD, or 240Vac Power Supply

Rear view of DCB SR-01-BPF


How to Order


SR-01-BPF Frame Relay Async Polling FRAD (Single port)
SR-04-BPF Frame Relay Async Polling FRAD (Four port)
Call Optional Power Supplies in place of standard power supply
SR-DSU-56 Internal 56 Kbps DSU
SR-DSU-64 Internal 56/64 Kbps DSU


see other pages


301-924-7400 EXT 25

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