Matrix Telecom ETERNITY NE - Page 299

Matrix ETERNITY NE System Manual 289
Set this timer accurately. If the set time is more than the actual time taken by the CO to release the line,
it will result in delay to the caller. If the set time is less than the actual time taken by the Central Office,
no dial tone will be played to the caller.
Valid range 001 to 255. Default: 002 seconds.
• To limit Loop Current, by default Current Limiting is enabled. When this check box is enabled, the Loop
Current is limited to a maximum of 60mA.
• Set the Minimum Loop Current at which DAA module of the CO Trunk port can operate. Select the
minimum operational loop current from the following options as per your requirement:
•10
•12
•14
•16
Default: 10 mA.
• If required, you may adjust the Tip Ring Voltage (Volts) on the line side.
In countries where Low voltage is required, you should set lower TIP/RING voltage in SARVAM UCS.
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.
• Set the Ringer Impedance as 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 ring impedance which is achieved by
the DAA module, when Ringer Impedance is set to 'Synthesized' impedance.
Default: 'High' (20Mohm).
• Set the Ringer Threshold (Vrms) level. 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 the Ringer
Threshold to the desired value from the following options:
• 13.5 - 16.5
• 19.35 - 23.65
• 40.5 - 49.5
Default: 13.5 - 16.5 Vrms.
• If the CO trunk port you are configuring is located in a “Behind the System Application”, configure Pre
PSTN Digit Count. 'Pre-PSTN Digit Count' or PPDC is the number of digits (dialed by an extension) to be
ignored by the system before toll control check is begun. It is the same as the number.
In Behind the PBX Applications, another PBX may be connected to the SARVAM UCS, with some of its
CO Trunks terminating into the Extension ports of the other PBX, and other trunks being directly
connected to the PSTN.
If the CO Trunk port is directly connected to the PSTN, PPDC must be set to '0'.