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Configuring Analog Port Parameters for CESoPSN Bundles (CTPView)

Starting from CTPView Release 7.0, you can configure CESoPSN bundles on CTP2000 devices to transfer voice data between analog ports (FXO, FXS, and 4W ) and T1E1 ports. You can configure a maximum of 64 CESoPSN bundles on a CTP2000 device. The maximum number of CESoPSN bundles supported over analog ports is limited to 16 per node.


Runtime diagnostics is not supported for CESoPSN bundles configured over analog port.

Before you begin:

  1. Log in to the CTPView software with at least the Net_Admin level.

  2. Connect the CTPView server to the CTP device for which you want to configure bundles.

To configure analog port parameters by using CTPView:

  1. From the side pane, select Bundle > Configuration.
  2. Mouse over the Display and Select an Existing Bundle bar.
  3. From the table of bundles, select the bundle that you want to modify.
  4. Under Port Options, configure the parameters described in Table 1.

    The options vary depending on whether the bundle is T1 or E1.

  5. Click Click to Submit Bundle AND Port Changes.
Table 1: Analog Port Parameter Settings for CESoPSN Bundle (CTPView)
Field Function Your Action

Voice Port Tx Gain

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

Select a dB value from the list.

Voice Port Rx Gain

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

Select a dB value from the list.

Voice Port Signalling

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

Voice Port PLAR

Enables or disables Private line automatic ringdown (PLAR) signaling. PLAR allows you to connect two 2W-FXS interfaces.

You must set signaling to loop start before you enable PLAR.

For PLAR to work, both ends of the bundle must have PLAR enabled.

With PLAR, two handsets are directly connected so that when someone picks up a handset, the handset at the remote end starts to ring. There is no call routing (dialing) involved.

To hear a ringback tone, you must enable tone detection for the bundle.

Select one:

  • Disabled

  • Enabled


Specifies the pulsecode modulation (PCM) encoding standard used on the port PCM input to the VComp bundle.

When a CESoPSN bundle is built with:

  • Analog voice interfaces, this configuration is applied on both the analog voice port and the voice compression module, so there are no compatibility issues.

  • T1/E1 channels, set companding to match the type of companding that is used for the external connecting equipment.

Generally, mu-law is used in the US and a-law is used in Europe and elsewhere.

Select one:

  • Mu-law—Generally used in the United States

  • A-law—Generally used in Europe and elsewhere