77 Matrix SETU VFXTH System Manual
If you enable Connect Source Port when number is outdialed, “Making a New Call using Access Code”
feature will not be allowed to the users.
Hardware Settings
• Click Hardware Settings.
• In the AC Termination Impedance field, select the appropriate Impedance of the FXO Port as per the AC
Termination Impedance supported by your CO network. Default: 600
• In the CO Termination field, select the appropriate line impedance match. This would depend on the
region where SETU VFXTH is deployed. Default: None.
This parameter allows you to increase near-end echo cancellation on the FXO Port. Near-end echo is
primarily caused by the mismatch between AC Termination Impedance (presented by FXO Port of SETU
VFXTH to the line) and CO Termination (Impedance presented by the Central Office to the line), and to
some extent by the transmit and receive signal path.
By correcting the line impedance mismatch, you can increase near-end echo cancellation. This is done by
selecting the AC Termination Impedance and CO Termination, and selecting a Line Type that most closely
models the line that connects the FXO Port of SETU VFXTH to the Central Office.
Now, select the line model to be used from the CO Line Type list.
• In the CO Line Type field, select a line type that most closely models the line connecting SETU VFXTH to
the Central Office. You may select a specific EIA line model from the eight options (EIA-0 to EIA-7) or a
specific wire gauge and length (2000 ft. 22/24/26awg). Default: None.
This parameter allows you to select the Line model for the AC Impedance-CO Termination you selected.
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