Matrix SETU VFXTH System Manual
78
You are recommended to conduct the AC Impedance Test for the line connected to the FXO Port to
determine the most appropriate values for the AC Termination Impedance, CO Termination and the CO
Line Type. For more information see the topic
.
•
If required, you may adjust the
Rx Gain
(Receiving Volume) on the FXO Port to increase or decrease the
volume of the calling party's voice being transmitted to you. Select the required Rx Gain level. Default: +0
db.
•
If required, you may also adjust the
Tx Gain
(Transmit Volume) on the FXO Port to increase or decrease
the volume of your voice being transmitted to the remote party. Select the desired Tx Gain. Default: +0 db.
•
In the
On-Hook Speed
field,
set the amount of time required for the line-side device (DAA) to go On-hook.
The On-hook speed specified is measured from the time the On-hook bit is cleared until loop current
equals zero. Select the desired On-hook Speed from the following options:
•
<0.5ms
•
3 ms
•
26 ms
Default: <0.5 milliseconds.
•
In the
OFF- Hook Speed
field, define the time required by the line transients to settle, after which
transmission or reception can occur. Select the desired Off-hook Speed from the following options:
•
512 ms
•
128 ms
•
64 ms
•
8 ms
Default: 8 milliseconds.
•
If you want to limit the loop current, select the
Current Limiting
check box.
The Loop Current will be
limited to a maximum of 60mA. Default: Disabled.
•
For the line-side device (DAA) of the FXO Port to operate, set the
Minimum Loop Current
. You can select
the minimum operational loop current from the following options as per your requirement:
•
10
•
12
•
14
•
16
Default: 10 mA.
•
To adjust the TIP/Ring Voltage on the line side, set the
Tip Ring Voltage (Volts).
In countries where Low voltage is required, use lower TIP/RING voltage. Adjust the values of the Tip Ring
Voltage to match your country requirements from the following options:
•
3.1
•
3.2
•
3.35
•
3.5
Default:3.5 volts.
•
Set the
Ringer Impedance
—High or Synthesized—for the FXO Port according to your country-specific
requirement.
