Section 4, User Interface Guide ATLAS 550 System Manual
154 © 2002 ADTRAN, Inc. 61200305L1-1F
MODULES (FXS-4/8) > CONFIG > RX GAIN
Write security: 3; Read security: 5
Adjusts the (+)Gain and (-)Attenuation of the relative signal received by the FXS. The range includes 0
(loudest), -3, and -6dB (softest).
MODULES (FXS-4/8) > CONFIG > TX GAIN
Write security: 3; Read security: 5
Adjusts the (+)Gain and (-)Attenuation of a digital signal transmitted by the FXS into the digital PCM
stream. The range includes +3 (loudest), 0, -3, and -6 dB (softest).
MODULES (FXS-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 (FXS-4/8) > CONFIG > CODING SCHEME
Read security: 5
Displays the current PCM coding scheme. Currently only µ-LAW is supported.
MODULES MENU (QUAD/OCTAL FXO OPTION MODULE)
The ATLAS 550 system controller automatically detects the presence of the Octal/Quad FXO Option
Module when they are installed in the system (Quad is listed as FXO-4 and the Octal is listed as FXO-8).
All menus in this section that apply to both modules are listed as FXS-4/8. To see the menus for the
Octal/Quad FXO 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 Quad/Octal FXO Option Module Quick Start
Guide for a menu tree containing a complete listing of menus.
MODULES (FXO-4/8) > INFO
Read security: 5
Provides information about the module part number, serial number, and assembly revision.
MODULES (FXO-4/8) > INFO > PART NUMBER
Read security: 5
Displays the part number of the module.
MODULES (FXO-4/8) > 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.