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vdaaerl(1) [debian man page]

VDAAERL(1)						    Voicetronix Telephony Tools 						VDAAERL(1)

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). VPB driver package Oct 11, 2007 VDAAERL(1)

Check Out this Related Man Page

TONEGEN(1)						    Voicetronix Telephony Tools 						TONEGEN(1)

NAME
tonegen - Test the Voicetronix programmable tone generator SYNOPSIS
tonegen [options] DESCRIPTION
The tonegen utility uses the programmable tone generator to send tones to some port. OPTIONS
The following options are available: --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. --toneid num Play a locale specific predefined tone, where 0 <= num < VPB_TONE_ID_MAX. The locale is decided according to the value of the VPB_COUNTRY environment variable. --tone n freq mag Set a single component for a user defined tone. This option may be used more than once with different values of n to set the compo- nents of a multi-frequency tone. Legal values for the other parameters are 0 < freq <= 4000 (Hz), and -inf < mag < 0.0 (dB). --ontime ms The number of milliseconds that a user defined tone should be on for. --offtime ms The number of milliseconds that a user defined tone should be off for. --dial digits Generates a dial string using the specified dtmf digits. --sync Play tones using the synchronous api functions. The default is to use the async api. --loop Loop cadenced tones continuously. Has no effect if a continuous tone has been specified. --recgain db Set software record gain in dB. Default is 0.0 --rec file Record audio to a file while playing. --contest Do not wait for a tone to complete before starting the next one. This can be useful for stress testing the coherency of the tone generator. --help, -? Show summary of these options. AUTHOR
Ron Lee, 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). VPB driver package Feb 18, 2007 TONEGEN(1)
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