RDU™

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Remote Data Unit

The Product

The Remote Data Unit (RDU™) is a high density serial port expander module that has 12 DB25 serial ports and 1 Ethernet port. The RDU™ is available for use with the VSR 1200™ product for serial port expansion. Each serial port on this module can handle both sync/ async legacy data protocols, supporting up to 240 remote terminals per RDU™, with the assumption of 10 sites per serial port.

The connectivity between the RDU™ module and the VSR 1200™ takes place over a 10baseT Ethernet port providing flexible mounting locations.

The VSR 1200™ is integrated with best-of-breed IP VPN features, IP routing, advanced QoS, dynamic packet inspection firewall, embedded address management capabilities, and legacy data support via a high-density RDU™ serial module. Such flexibility provides stateful-inspection firewall, with the scalable performance needed for the most demanding network applications.

Serial Application Diagram - Multi-Network

RDU Network Diagram


Each serial port on the RDU™ is a DB25 female connector, physical DCE RS-232. A DB25-to- DB25 crossover conversion cable is to be used if a physical DTE interface is required. The front of the RDU™ has 12 LEDs, one for each serial port. Table 2-10 describes the LED states for the RDU’s serial ports.


Figure 1. Remote Data Unit, Front

RDU Front


Figure 2. Remote Data Unit, Rear

RDU Back


Specifications subject to change without notice

Printable RDU™ Data Sheet