Configure the Input Level Gain

1. Click on Configure, Voice, and Channels. from the navigational window.



You will see the Voice Channels window:



2. Locate the desired analog voice channel and click on the number in the Voice Profile column for that voice channel. You will see the Voice Profile window:



The Input Level Gain and Output Level Attenuation parameters are located towards the top of the window.

3. When all desired configuration changes are made, click Save (located towards the bottom of the window). A "Command Successful" message appears.
• After the input level gain adjustment is completed, write down the setting used to bring the input level to -4 dBm. You will need it for setting other FXO channels.

You have now established the input level gain setting on the FXO voice channel. In the following steps you will adjust the output level attenuation setting on the FXO channel.

• Reconnect the No.1 telephone set to its Voice Network Analyzer.
• Set the SETUP switch on both Voice Network Analyzers to BRDG.
• Take the No.2 telephone set off-hook. You will receive a dial tone from voice channel number 2. Dial extension 15. You will receive a dial tone from the PBX. Dial station 123 (or PSTN telephone number). The No.1 telephone set will ring.
• Place the SETUP switch on the No.1 Voice Network Analyzer to TERM. The telephone will stop ringing.
• Place the SETUP switch on the No.2 Voice Network Analyzer to TONE, and disconnect the No.2 telephone from the Voice Network Analyzer.
• Use Display the Input Level (Passport 4430/50/55) or Display the Input Level (Passport 4460) to display the input level status of voice channel 2 (FXS). If other than -4 dBm, make the necessary adjustments. To do that, follow Configure the Input Level Gain.
• Read the value of the receive level on the No. 1 Voice Network Analyzer display. The receive level should be -12 dBm or lower. If the reading is more positive than -12 dBm, adjust accordingly, record the setting, then save. Use the recorded value for setting other FXO voice channels.
• Now that both channels are adjusted, test the voice quality. To do that, place both Voice Network Analyzer SETUP switches to BRDG, take the No. 2 telephone off-hook, dial 15, wait for the dial tone and dial station 123. Talk to verify that there are no echoes. If there are echoes, the output level attenuation of the No.1 channel is too low. You must use the previous procedures to increase the output attenuation setting of the FXO channel.
• Restore the FXS voice channel to FXO; it was used temporarily as a companion device with the FXO voice channel under test. Restore all channels to system controlled Busy.

End Of Topic