Configurator Procedure for Adjusting E&M Voice Channels

Use the test setup shown in the figure below. Initially, set both Voice Network Analyzers (VNA) to BRDG, TEST and OFF. The PBX station numbers, trunk access code, and network extension numbers in the figure below are fictitious, used here for reference only.

• Select the first two E&M voice channels within the local unit to be adjusted. Set any additional voice channels to forced On busy condition to insure that the test calls operate only through the channels under test. It is assumed that the signaling format for the E&M voice channel is configured for DC.
• Place a call from the No.1 telephone to the No.2 telephone. To do that, lift the No.1 telephone off-hook, wait for the dial tone, and dial the tie trunk access code (typically 80). A second dial tone should be heard from voice channel 1.
• Dial network extension 16. You should hear a third dial tone from the PBX.
• Dial PBX station 456. The No.2 telephone set will ring.
• Place the SETUP switch on the No.2 Voice Network Analyzer to TERM. The telephone will stop ringing.
• Place the SETUP switch on the No.1 Voice Network Analyzer to TONE, and disconnect the No.1 telephone from the Voice Network Analyzer.

1. Display the input level status of E&M voice channel 1. To do that, click on Status/Statistics, Voice, and Voice from the navigation window.



You will see the Voice Channel Statistics window.



2. At the top of the window, click on Status. You will see the Voice Channel Status window:



3. At the top of the window, click on EPROM Status. You will see the Voice EPROM Status window:



The input level for the voice channels is displayed in the right-most column.

4. If the reading for Input Level Gain is more positive than -4 dBm, apply negative gain (input attenuation) until this reading is above -4 dBm.

Example:

The reading is -1 dBm. The Input Level Gain setting in the associated voice profile is -2 dB.

Add three increments of negative gain by changing the setting to -5 dB. To do that, use "Configure Input Level Gain and Output Level Attenuation".