Matrix Visionpro System Manual page 63

• Minimum Loop Current (mA): This parameter sets the minimum loop current at which DAA module of the
CO port can operate. Select the minimum operational loop current from the following options as per your
requirement:
• 10mA
• 12mA
• 14mA
• 16mA
The minimum Operational Loop Current set by default is set to 10mA.
• TIP-RING Voltage (Volts): This parameter allows TIP-RING Voltage Adjustment on the line side.
Countries where Low voltage is required should use lower TIP-RING voltage. Adjust the values to match
your country requirements from the following options:
• 3.1
• 3.2
• 3.35
• 3.5
The default TIP-RING voltage is 3.5.
• Ringer Impedance: Set the Ringer Impedance - High or Synthesized - for the CO port according your
country-specific requirement.
'High' signifies 20MOhm Ringer Impedance. This is the default Ringer Impedance provided on the line side
by the DAA module of the CO port. The DAA Module can provide higher impedance when 'Synthesized'
impedance is selected.
Some countries like Poland, South Africa and Slovenia require higher Ringer impedance which is achieved
by the DAA module, when Ringer Impedance is set as 'Synthesized'.
By default 'High' (20MOhm) is selected.
• Ringer Threshold (Vrms): This parameter defines the level below which the CO port would not validate
the Ring signal and the level above which it would validate the Ring signal. Set Ringer Threshold to the
desired value from the following options:
• 13.5 - 16.5
• Reserved
• 19.35 - 23.65
• 40.5 - 49.5
By default 13.5 - 16.5 Vrms is set as Ringer Threshold.
• Trunk First Digit Wait Timer: This timer signifies the time for which VISIONPRO waits for the first digit
after grabbing the trunk.
• Trunk Inter Digit Wait Timer: This timer signifies the time for which VISIONPRO waits between accepting
two digits from the caller. This timer is loaded when the caller dials the first digit (digit could be other than
station number) and waits for the second digit.
57 Matrix VISIONPRO System Manual