Voice Path Configuration

148

Setting Loop Gain

If the IAD feeds telephone circuits into a legacy PBX or other equipment that defines transmit and receive levels to the network, the loop gain value must match the value of the circuit it supplies—the levels set and determined by the PBX or terminating equipment manufacturer.

You must also change the loop gain value if there is a decrease in power between the signal transmitted and the signal received due to loss through equipment, lines or other transmission devices, degradation in service or customer perception.

NOTE Loop gain values should only be set by your Network Administrator.

To set loop gain values, type G to display the Configure Loop Gain menu:

Figure 7–10. Loop Gain Menu

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Configure Loop Gain Menu

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Current Control Mode = AUTO Control Mode

1.Set Loop Gain for all ports

2.Display current Loop Gain settings

3.Configure Loop Gain setting per port

Type the option for the command to execute and proceed to the appropriate section.

Setting Loop Gain for All Ports

To set the Transmit (-9dB to 3dB—default -2dB) and Receive (-9dB to 3dB—default -4dB) Loop Gain values for all ports:

1.Type 1 to select Set Loop Gain for all ports.

2.The IAD displays this prompt for the transmit loop:

Enter Transmit Loop Gain for all ports (range -9dB/ 3dB) [-2dB]:

Type the value (include a dash for negative values) and press Enter.

3.The IAD displays this prompt for the receive loop:

Enter Receive Loop Gain for all ports (range -9dB/ 3dB) [-4dB]: -5

Type the value (include a dash for negative values) and press Enter.

4.The IAD saves the loop gain values and displays the menu.

5.Press Escape to return to the Voice Configuration menu and continue voice path configuration.

6.Reset the IAD (page 15) when you finish voice path configuration.

NetEngine IAD User Guide

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Polycom 7000, 6000 manual Setting Loop Gain for All Ports
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7000, 6000 specifications

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