Sync D-FRAP-R303 Frame Relay Access Probe 56/64 Kbps DSU/CSU V.35 WAN

Sync D-FRAP-R303 Frame Relay Access Probe 56/64 Kbps DSU/CSU V.35 WAN

The Sync D-FRAP-R303 is a Frame Relay Access Probe (FRAP) with an integral 56/64 Kbps DSU/CSU, designed to monitor and collect performance data on frame relay WAN circuits. It functions as a standalone monitoring unit or as part of a wider network-deployed probe system, gathering statistical data on frame relay traffic at the physical access point. The front panel provides a built-in LCD display and keypad for local interaction, making it self-contained for both field deployment and central office use.

Specifications & What's Included

• Model: Sync D-FRAP-R303, Rev. A
• Manufacture date: 02/08/00
• Built-in DSU/CSU: 56/64 Kbps integral DSU/CSU
• WAN interface: V.35 M-Block connector
• Additional rear ports: RJ-45, barrel power jack
• Front panel: LCD display and numeric keypad
• Power: 5V DC, 2.0A
• Form factor: Desktop/benchtop enclosure
• Collects all RFC 1315 frame relay variables: FECNs, BECNs, DE bits, frame errors, packets transmitted/received, and more
• Short-term collection intervals: user-configurable, 3–15 seconds
• Long-term collection intervals: user-configurable, 4 seconds to 60 minutes
• QoS/SLA monitoring: round-trip delay, availability, and utilization percentage per PVC and per-DLCI
• TFTP software downloadable over the network
• Supports Sync VNIP (Virtual Network Interface Protocol) for automatic topology mapping, congestion monitoring, and per-PVC loopbacks and diagnostics
• Assembled in the US with US and non-US components
• Included: unit only — no cables or accessories

Applications

Frame Relay Access Probes like the D-FRAP-R303 are used by telecom carriers, ISPs, and enterprise network operations teams to monitor the health and performance of frame relay WAN circuits at the access point — the physical handoff between a customer premises and the frame relay network cloud. The integral DSU/CSU eliminates the need for a separate channel service unit, making the D-FRAP-R303 a compact, all-in-one device for edge-circuit monitoring. It is particularly suited for verifying Service Level Agreements (SLAs) by measuring round-trip delay, availability, and utilization on a per-PVC and per-DLCI basis — the specific metrics carriers and enterprise WAN teams used to confirm that contracted throughput and latency commitments were being met. Frame relay was the dominant WAN technology of the 1990s and early 2000s for connecting branch offices and remote sites over leased digital circuits, and purpose-built access probes like this were standard tools in network management centers of that era. The VNIP capability added centralized topology visibility and remote loopback testing across distributed probe deployments.