Section 4, User Interface Guide ATLAS 550 System Manual
158 © 2002 ADTRAN, Inc. 61200305L1-1F
Option Module.
MODULES (FXO-4/8) > CONFIG > RX GAIN
Write security: 3; Read security: 5
Adjusts the (+)Gain and (-)Attenuation of the relative signal received by the FXO port (Digital-to-Analog).
The range includes 0 (loudest), -3, and -6dB (softest).
MODULES (FXO-4/8) > CONFIG > TX GAIN
Write security: 3; Read security: 5
Adjusts the (+)Gain and (-)Attenuation of a digital signal transmitted by the FXO into the digital PCM
stream. The range includes +3 (loudest), 0, -3, and -6 dB (softest).
MODULES (FXO-4/8) > CONFIG > 2W IMPEDANCE
Read security: 5
2-wire input impedance is set to 600 Ω +2.16 µF. This is a read-only field.
MODULES (FXO-4/8) > CONFIG > CODING SCHEME
Read security: 5
Displays the current PCM coding scheme. Currently only µ-LAW is supported.
MODULES MENU (OCTAL E&M OPTION MODULE)
The ATLAS 550 system controller automatically detects the presence of the Octal E&M Option Module
when it is installed in the system (listed as E&M-8). To see the menus for the Octal E&M Option Module
via the terminal menu, use the arrow keys to scroll to the MODULES menu and press <Enter> to access the
module choices. Refer to the Octal E&M Option Module Quick Start Guide for a menu tree containing a
complete listing of menus.
MODULES (E&M-8) > INFO > PART NUMBER
Read security: 5
Displays the part number of the module.
MODULES (E&M-8) > INFO > SERIAL NUMBER
Read security: 5
Displays the serial number of the module.
When the digital signal is connected through the PSTN, a setting of -3 dB should be used.