Voice Compression; Fxs Module; Fxo Module; E&M Module - ADTRAN Express 5210 User Manual

control the Express 5210 through the terminal menus. See the
section TELNET Utility on page 4-1 for more information on setting
up a TELNET session.

Voice Compression

The Express 5210 voice option cards employ voice compression
technology to provide toll-quality voice using significantly less
bandwidth than traditional voice channels. In addition to
supporting voice calls, the cards support group 3 facsimile up to
14.4 kbps. The Express 5210 dynamically allocates bandwidth to
voice and data applications. This results in all bandwidth being
available for data applications in the absence of voice or fax.
For information on configuring these options, see the chapter Voice
Configuration on page 8-1. The three available voice options are
described in the following sections.

FXS Module

The FXS module provides two 2-wire compressed voice interfaces
and serves as the source of line current and ringing voltage. The
FXS serves as the station side of a foreign exchange FXS/FXO
application. The FXS may also be paired with another FXS to
provide private line automatic ringdown (PLAR) function across
the WAN.

FXO Module

The FXO module provides two 2-wire compressed voice interfaces
and provides a load for line current. The module includes a ring
detector and a line current detector. The FXO serves as the office
side of a foreign exchange FXS/FXO application.
E&M Module
The E&M module provides two 2- or 4-wire compressed voice
interfaces for use in E&M applications.
61200208L1-1 Express 5210 User Manual
Chapter 1. Introduction
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