ADTRAN 1204006L1 Manual do Utilizador descarregar pdf (Página 18)

2 FSU 5622 ESP User Manual 61200.175L1-1

Chapter 1. Introduction

equipment. 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 FSU 5622 ESP is a standalone frame relay access

device (FRAD) that provides a cost-effective means of transport-

ing voice and multi-protocol data over frame relay or DDS

networks. The FSU 5622 ESP provides an easy-to-use interface

for customers migrating existing services or developing new

applications for operation over frame relay networks.

The FSU 5622 ESP provides high-quality voice and fax capabili-

ties to remote locations without expensive toll charges. In frame

relay networks the FSU 5622 ESP 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 an ESP option

card. Options include: ESP Dual FXS, ESP Dual FXO, and ESP

Dual E&M.

The FSU 5622 ESP 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.

The FSU 5622 ESP 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 examin-

ing 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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