Modem Tuning (Netguardian 480 G2); Modem Tuning (Netguardian 480 G1) - DPS Telecom NetGuardian 480 User Manual

To reboot the NetGuardian , click on the red reboot button—see Figure 45. The reboot confirmation box will
appear. Click Yes or No to confirm the reboot.
8.14

Modem Tuning (NetGuardian 480 G2)

This capability allows you to easily measure and adjust dB transmission levels of the 202 modem to meet
industry standards.
Tuning the modem of the NetGuardian 480 can be performed using the VF test set and the front panel Toggle
switch. Connect the VF test set to the transmit leads of the 202 port of the NetGuardian 480. The NetGuardian
480 will emit a 1200 Hz 'mark' for the first Toggle up, and a 2200 Hz 'space' for a down Toggle. Subsequent up
commands will increment the level, while down commands will decrement the level.
The Config LED will show solid GREEN to indicate the unit is in tune mode. Holding the Toggle switch up or
down will rapidly increment or decrement the level setting. After 5 seconds of switch inactivity, the NetGuardian
480 will save the new setting and automatically exit tune mode. *
* The DPS factory dB standard is -13dB.
8.15

Modem Tuning (NetGuardian 480 G1)

Tune the NetGuardian 480's 202 serial interface via T/NG480 and the DIP switches. Use the following steps to
tune the 202 serial interface:
1. Using T/NG480-SNMP, configure DCP port type to "T202."
2. To enter tune mode, set DIP switch 1 to on position (down for on).
Note: The CFG LED will remain SOLID GREEN while in tune mode and tone will be turned on.
3. Use the front panel push button to select the command and send it to the modem.
Note: The SER LED will FLASH RED when the response to the command is seen from the modem. The
ERR LED will BLINK RED to indicate a tuning error occurred.
4. Use DIP switches 2, 3, 4 to indicate the command you would like to send the modem (up = 0, down = 1) —
see Table D. Use the front panel switch to select the command.
Fig. 45. The Reboot button.
Fig. 46. Modem Tune Toggle
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