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Configuring 2W-FXO Port Parameters for VComp Bundles (CTP Menu)

This topic describes how to configure port parameters for 2W-FXO interfaces.

Before you begin:

  • Disable the bundle before you modify the bundle options.

To configure port parameters for 2W-FXO interfaces using the CTP Menu:

  1. From the Main Menu, select 1) Bundle Operations.
  2. Select 4) VCOMP.
  3. Select a bundle from the list.

    If you select an active bundle, you are prompted to disable the bundle before configuring it.

  4. Select 3) Port Config.
  5. Follow the onscreen instructions, and configure the options as described in Table 13.

Table 13: VComp Bundle 2W-FXO Port Parameter Settings in the CTP Menu

FieldFunctionYour Action

Voice port Tx gain

Specifies the gain in the direction from the analog interface toward the IP network.

Enter a number from -23.8 through 1.6 dB in intervals of 0.1 dB.

Voice port Rx gain

Specifies the gain in the direction from the IP network to the analog interface.

Enter a number from -7.6 to 17.7 dB in intervals of 0.1 dB.


Specifies the type of analog signaling used.

Select one:

  • ground start—Typically used between a central office (CO) and a PBX to prevent glare. Glare occurs when the FXS device establishes a call and the FXO device attempts to make a call before the ring is detected.
  • loop start—Typically used for residential phones.


Private line automatic ringdown (PLAR) is not supported on FXO interfaces.

Not supported

Related Documentation

Modified: 2015-11-17