ADTRAN AOS Version R10.1.0 Command Reference Manual page 1752

Command Reference Guide
test erl
Use the test erl command to automatically determine the correct impedance value for analog lines
connected to the foreign exchange office (FXO) port. This is helpful when troubleshooting problems with
FXO equipment and assists in adjusting the correct audio levels. Use the no form of the test erl all and test
erl current command to disable these features. Variations of this command include:
test erl all
test erl all auto-set
test erl clear-results
test erl current
test erl display-results
This feature is available only on units with digital signal processor (DSP) hardware
version Freescale MSC7119, and AOS version A2.02 or above. To determine the DSP
hardware version, issue the show version command and look for the DSP hardware
version.
Syntax Description
all
auto-set
clear-results
current
display-results
Default Values
By default, this command is disabled.
Command History
Release A2.04
Functional Notes
Before using this feature, an analog line from the service provider must be connected to the FXO interface
and the line must be idle (no call in progress). The FXO interface must be connected to a voice trunk in
order to make the tool available for use.
During the test, the tool sets the FXO transmit gain and receive gain levels to 0 dB to make the proper
measurements. These settings are returned to the configured values when the test is complete. The
rx-gain value adjusts the level being transmitted from the FXO to the line. The tx-gain value adjusts the
level being transmitted from the FXO to the dsp.
60000CRG0-35E
Specifies running the test repeatedly, testing all available impedance
settings for the interface.
Optional. Sets automatically the best measured impedance for the
interface.
Clears the results from the echo return loss (erl) test.
Specifies running the test once, using the current impedance setting.
Displays a snapshot of the current test status.
Command was introduced.
Copyright © 2012 ADTRAN, Inc.
FXO Interface Command Set
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