Product Overview - ADTRAN Express 5200 User Manual

Chapter 1. Introduction
This DLCI is valid until the call is disconnected and may be
assigned a different value each time a call is requested.

Product Overview

The ADTRAN Express 5200 is a standalone frame relay access
device (FRAD) that provides a cost-effective means of transporting
voice and multi-protocol data over frame relay or DDS networks.
The Express 5200 provides an easy-to-use interface for customers
migrating existing services or developing new applications for
operation over frame relay networks.
The Express 5200 provides high-quality voice and fax capabilities
to remote locations without expensive toll charges. In frame relay
networks, the Express 5200 allows voice and data to share the same
PVC, eliminating unnecessary PVC charges associated with other
vendor's voice and data frame relay products. Two voice ports are
provided when configured with a voice option card. Options
include: Dual FXS, Dual FXO, and Dual E&M.
The Express 5200 provides two independent DTE interfaces for
connecting non-frame relay devices to the frame relay network.
These ports can be configured for either EIA-232 or V.35 signal
specifications. Synchronous protocol speeds up to 512 kbps and
asynchronous protocol speeds up to 38.4 kbps are supported. See
the appendix Pinouts on page A-1 for the pin assignments for these
interfaces.
The Express 5200 handles each frame of the user data in a three-
step manner. The first step is terminating the user protocol. The
layer at which this termination occurs varies, depending on the
user protocol selection for a given port. The next step is examining
the user protocol destination address and routing to the destination
port and virtual circuit. The last step involves encapsulating the
information field of each frame and re-encapsulating based on the
destination port configuration. A similar process is used for frame
relay frames received on the network port.
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