Help us improve your experience.

Let us know what you think.

Do you have time for a two-minute survey?

Terminal Amplifier Solutions

 

The 96-Channel Amplifier (AMP1) is a terminal amplifier that integrates two erbium-doped optical amplifiers to provide bidirectional amplification of DWDM optical signals in a point-to-point bookended configuration. The amplifier is optimized for 10-Gbps, 25-Gbps, and 100-Gbps signals, and includes an embedded optical supervisory channel (OSC) used for span loss control.

The AMP1 is designed to provide amplification of the composite signal in single span point-to-point applications between 96-Channel DWDM Mux/Demux modules as shown in Figure 1.

Figure 1: 96-Channel Amplifier Application
96-Channel Amplifier Application

Provisioning a 96-Channel Amplifier Node

Use this procedure to provision the 96-Channel Amplifier (AMP1) in a point-to-point configuration.

Prerequisites:

  1. Enter configuration mode.
    bti7800# config
  2. Verify the amplifier that you want to configure is created.

    For example, to verify that amp:1/11 is created:

    bti7800(config)# do show amp | include amp:1/11
  3. Create the optical group for this amplifier.

    For example, the following creates group 1:

    bti7800(config)# amp group 1

    The 96-Channel Amplifier can only be used in a non-equalizing terminal configuration. Therefore, its group-type must be noEqlzTerm.

  4. Assign the amplifier to this group.

    When the group is created, the degree is also created. A noEqlzTerm has only one degree (degreenum 1).

    For example, to assign the 96-Channel Amplifier to group 1 degree 1:

    bti7800(config-amp)# eqpt amp:1/11 groupnum 1 .

    The system automatically creates all the ports on the amplifier.

    bti7800(config-amp)# do show amp | include 1/11
  5. Configure the OSC settings.

    For example, to configure far end identifier mismatch monitoring:

    bti7800(config-amp)# osc osc:1/11/1/1.1
  6. Configure port and wdm settings as required.

    See Managing optical power for details on the parameters to set for the specified applications.

    Note

    The fiber type must be configured for the system to automatically compensate for the tilt.

    • To configure client port settings, use the amp port client:1/11/1/1 command.

    • To configure line port settings, use the amp port line:1/11/1/1 command.

    • To configure DCM port settings, use the amp port dcm:1/11/1/1 command.

    • To configure WDM settings, use the amp wdm wdm:1/11/1/1 command.

  7. When you are finished, apply the provisioning.
    bti7800(config-amp)# commit

The local amplifier node is created. Proceed to create the amplifier node at the far-end network element.

Managing Optical Power

There are two types of BTI7800 point-to-point network deployments: standard and 100-Gbps coherent-only. The standard system supports a mix of transceivers, for example, 100-Gbps coherent, 4x28-Gbps, and 10-Gbps, and supports a maximum supported span loss of 23 dB. The 100-Gbps coherent-only system supports only 100-Gbps coherent transceivers, and supports span losses greater than 23 dB.

The default post-amp gain value is set at 4.0 dB. To adjust the post-amp-gain you use the amp wdm CLI command.

  • Standard System Deployment: The default post-amp gain is used for the first 40 channels. You adjust the post-amp gain when your system reaches 40, 80 and 96 channels.

  • 100-Gbps Coherent-only Deployment: The post-amp gain should be set to 5.0dB for the first 40 channels. You adjust the post-amp gain when your system reaches 40, 80 and 96 channels.

Note

If you are installing more than 40 channels during first-time installation, you must provision the additional channels before bringing all the channels into service.

To add channels after first-time installation, you must perform a post-amp gain adjust procedure, which is not covered in this guide. Adding channels after first-time installation should be performed during a maintenance window, although the BTI7800 supports post-amp gain adjustments while the system is in service.

Managing Optical Power in a Standard Point-to-Point Deployment

The following sections provide information on the minimum required procedures to control optical power levels in a standard point-to-point deployment after first-time installation.

Note

Add channels in increasing order of the channel frequencystarting with 191.80 THz, 1563.05 nm.

Verifying the OSC Receive Power for a Standard Point-to-Point Deployment

On low-loss spans it might be necessary to fit a fixed pad attenuator to the Line port of the 96-Channel Amplifier to avoid overload of the 1510 nm OSC receiver. The maximum supported power to the OSC receiver is -7 dBm.

For each amplifier, verify the OSC optical power received using the command: show statistics current entity osc:chassisID/location/ BIC-1/<portNum>.<oscNum> binLength 1Minute, and reference the parameter: Optical power received. As needed, adjust the pad to the Line port of the amplifier, based on the following values to operate at power levels up to 23 dBm:

  • If the OSC optical power received is ≤ -7 dBm, do not fit a pad.

  • If the OSC optical power received is between -2 and -7 dBm, fit a 5-dB pad to the Line port.

  • If the OSC optical power received is > -2 dBm, fit a 10-dB pad to the Line port.

Provisioning Tilt Control Parameters: Standard Deployments

The following parameters on the 96-Channel Amplifier must be provisioned when the module is installed for the first-time:

  • DCM: Must be associated to the amplifier. Use the command amp eqpt.

  • Fiber type: Using the command amp wdm.

Once these values are configured, the amplifier automatically compensates for the tilt in the system.

Provisioning Post-Amp Gain Control: Standard Deployments

The default post-amp gain value is set at 4.0 dB.

You adjust the post-amp gain when your system reaches 40, 80 and 96 channels. To adjust the post-amp-gain you use the amp wdm CLI command, in Configuration model.

If you are installing more than 40 channels during first-time installation, you must provision the additional channels before bringing all the channels into service. To add channels during first-time installation use the command amp wdm.

Note

To add channels after first-time installation, you must perform a post-amp gain adjust procedure, which is not covered in this guide. Adding channels after first-time installation should be performed during a maintenance window, although the BTI7800 supports post-amp gain adjustments while the system is in service.

Managing Optical Power in a 100-Gbps Coherent Point-to-Point Deployment

The following sections provide information on the minimum required procedures to control optical power levels in a 100-Gbps coherent point-to-point deployment after first-time installation.

Note

Add channels in increasing order of the channel frequencystarting with 191.80 THz, 1563.05 nm.

Note

DCMs (Dispersion Compensation Modules) are not used in a 100-Gbps coherent-only deployment.

Verifying the OSC Receive Power for a 100-Gbps Coherent Point-to-Point Deployment

On low-loss spans, it might be necessary to fit a fixed pad attenuator to the Line In port of the 96-Channel Amplifier to avoid overload of the 1510 nm OSC receiver. The maximum supported power to the OSC receiver is -7 dBm.

For each amplifier, verify the OSC optical power received using the command: show statistics current entity osc:chassisID/location/ BIC-1/<portNum>.<oscNum> binLength 1Minute, and reference the parameter: Optical power received. As needed, adjust the pad to the Line In port of the amplifier, based on the following values to operate at power levels up to 23 dBm:

  • If the OSC optical power received is ≤ -7 dBm, do not fit a pad.

  • If the OSC optical power received is between -2 and -7 dBm, fit a 5-dB pad to the Line port.

  • If the OSC optical power received is > -2 dBm, fit a 10-dB pad to the Line port.

Managing a Receive Power Overload

To avoid an overload of the 100-Gbps transceivers, manually provision the attenuation of the client transmission loss to 5.0 dB using the command amp port.

Provisioning Tilt Control Parameters: 100-Gbps Coherent Deployments

The Fiber Type parameter on the 96-Channel Amplifier must be provisioned when the module is installed for the first-time. To provision the fiber type use the command amp wdm.

Once this is configured, the amplifier automatically compensates for the tilt in the system.

Provisioning Post-Amp Gain Control: 100-Gbps Coherent Deployments

The default post-amp gain value is set at 4.0 dB. To adjust the post-amp-gain you use the amp wdm CLI command, in Configuration mode.

The post-amp gain should be set to 5.0 db for the first 40 channels. You adjust the post-amp gain when your system reaches 40, 80 and 96 channels.

If you are installing more than 40 channels during first-time installation, you must provision the additional channels before bringing all the channels into service. To add channels during first-time installation use the command amp wdm.

Note

To add channels after first-time installation, you must perform a post-amp gain adjust procedure, which is not covered in this guide. Adding channels after first-time installation should be performed during a maintenance window, although the BTI7800 supports post-amp gain adjustments while the system is in service.