xenial (1) vdaaerl.1.gz

Provided by: vpb-utils_4.2.59-2_amd64 bug

NAME

       vdaaerl - Measure the echo-return loss on Voicetronix FXO telephony modules

SYNOPSIS

       vdaaerl [options]

DESCRIPTION

       The  vdaaerl  utility  tests the echo-return from a telephone line connected to a Voicetronix FXO module,
       such as those used on the OpenPCI range of cards.  It can scan all available impedance values to find the
       best match for a particular line.

       It will wait for an incoming call on the port under test.  The calling handset should have the microphone
       well muted for the duration of the test.

       A series of tones will be played down the line to determine  the  ERL  in  several  parts  of  the  audio
       spectrum.   You  should  avoid  creating  any  other noise on the line while this test is running, or the
       results may be skewed.

       If no --impedance is specified, and the --scan option is not  used,  then  the  default  impedance  value
       (based on the port's country selection) will be used.

OPTIONS

       The following options are available:

       --help, -?
              Show summary of options.

       --card number
              Explicitly select the card to test.  Default is card 0.

       --port number
              Explicitly select the port to test. Default is port 0 of the card being tested.

       --impedance number
              Test a particular impedance setting [0 - 15].

       --scan Test all available impedances.

       --playgain db
              Set the hardware play gain.  Values may range from -12.0 to 12.0.

       --recgain db
              Set the hardware record gain.  Values may range from -12.0 to 12.0.

SEE ALSO

       proslicerl(1)

AUTHOR

       Ron Lee, Peter Wintulich, David Rowe, Voicetronix <support@voicetronix.com.au>

       This manual page was written by Ron <ron@debian.org>, for the Debian project (but may be used by others).