Provision Reconfigurable Optical Add/Drop Cards

This chapter describes the Reconfigurable Optical Add or Drop (ROADM) cards used in Cisco NCS 2000 SVO and its related tasks.

The following table lists the package support for the reconfigurable optical add/drop cards.

9-SMR17FS, 9-SMR24FS, 9-SMR34FS, 20-SMRFS, and 20-SMRFS-CV Cards

In this chapter, "9-SMRFS" refers to the 9-SMR17FS, 9-SMR24FS, and 9-SMR34FS cards. "20-SMRFS" refers to the NCS2K-20-SMRFS card. "20-SMRFS-CV" refers to the NCS2K-20-SMRFS-CV card.

The 9-SMR17FS, 9-SMR24FS, 9-SMR34FS, 20-SMRFS, and 20-SMRFS-CV cards are tunable over 96 channels in the C-band, at 50-GHz spacing on the ITU-T grid. The cards provide the flex spectrum capability, which gives the flexibility to allocate channel bandwidth, to increase the network scalability. With flex capability, the channel bandwidth is not fixed, but can be defined arbitrarily, with a specified granularity and within a given range. For each subrange, attenuation and power values are defined. The central frequency ranges from 191350 GHz (1566 .72 nm) to 196100 GHz (1528.77 nm).

The 9-SMR17FS, 9-SMR24FS, 9-SMR34FS, 20-SMRFS, and 20-SMRFS-CV cards are single-slot cards that integrate two cross-connect blocks (multiplexer and demultiplexer), a variable gain EDFA pre-amplifier, and a variable gain EDFA booster amplifier. The 9-SMR17FS, 9-SMR24FS, and 9-SMR34FS, cards support up to 9 directions for each ROADM node. The 20-SMRFS and 20-SMRFS-CV cards support up to 20 directions for each ROADM node. The cards can be installed in any service slot in the Cisco NCS 2000 Series chassis. The cards can be used in point-to-point, ring, multi-ring, or mesh topologies.

The 20-SMRFS-CV card has a dedicated laser source at the demultiplexer section, and a photodiode at the multiplexer section. The 20-SMRFS-CV card provides the connection verification capability using a connectivity check signal. The correctness and the quality of the interconnections determined by measuring the insertion loss of the external passive path can be validated with the connection verification feature. For more information about connection verification, see the Connection Verification and Verify Connections in Optical Cables sections.


Note


When the user pre-provisions the 20-SMRFS-CV card in the SVO web interface and inserts the 20-SMRFS card physically and conversely, the system automatically updates with the card that is physically inserted.


The EDFA pre-amplifiers in 20-SMRFS and 20-SMRFS-CV cards have switchable gain ranges. The following table describes the gain ranges and extended gain ranges of an EDFA pre-amplifier in the 9-SMR17FS, 9-SMR24FS, 9-SMR34FS, 20-SMRFS, and 20-SMRFS-CV cards.

Table 1. Gain Ranges and Extended Gain Ranges of EDFA Pre-Amplifier

Card

Gain Range

Extended Gain Range

9-SMR17FS

0–17 dB with controlled tilt

20 dB with uncontrolled tilt

9-SMR24FS

12–24 dB with controlled tilt

27 dB with uncontrolled tilt

9-SMR34FS

20–34 dB with controlled tilt

40 dB with uncontrolled tilt

20-SMRFS and 20-SMRFS-CV

Gain Range 1: 0–17 dB with controlled tilt

20 dB with uncontrolled tilt

Gain Range 2: 12–24 dB with controlled tilt

35 dB with uncontrolled tilt

For more information, such as the block diagrams and the card specifications of the 9-SMR17FS, 9-SMR24FS, 9-SMR34FS, 20-SMRFS, and 20-SMRFS-CV cards, see the data sheet.

20-SMRFS and 20-SMRFS-CV Ports

The 20-SMRFS and 20-SMRFS-CV cards have these ports:

  • [EXP 1–8]-1...8-TX, [EXP 9–16]-1...8-TX and [EXP 17–20]-1...4-TX ports send the split-off optical signal that contains pass-through channels to the other side of the NE.

  • [EXP 1–8]-1...8-RX, [EXP 9–16]-1...8-RX and [EXP 17–20]-1...4-RX port receive the optical signal from the pass-through channels.

  • OSC-TX—The OSC-TX port transmits the Optical Service Channel signal that is received from the LINE-RX port signal to the controller card, separating it from the C-Band signals.

  • OSC-RX—The OSC-RX port receives Optical Service Channel signal from the Controller Card and transmits it to the LINE-TX port.

  • COM-TX—The COM TX port transmits the combined power from all directions or add or drop ports toward the booster amplifier.

  • COM-RX—The COM RX port receives the optical signal from the pre-amplifier and sends it to the optical cross connect.


    Note


    The COM-TX and COM-RX ports are not physical ports on the faceplate.


  • LINE-TX—This port sends the optical signal from the local node to the far end node.

  • LINE-RX—This port receives the optical signal from the far end node.

9-SMR-FS Ports

The 9-SMR-FS card has these ports:

  • The nine EXP-TX ports send the optical signal to the other side of the NE based on the configuration of the internal WXC module.

  • The nine EXP-RX ports receive the optical signal from the pass-through channels.

  • OSC-TX—The OSC-TX port transmits the Service Channel signal that is received from the LINE-RX port signal, separating it from the C-Band signals.

  • OSC-RX—The OSC-RX port receives signal from the Service Channel module and transmits it to the LINE-TX port.

  • COM-TX—The COM TX port transmits the combined power from all the directions or add drop ports toward the amplifier.

  • COM-RX—The COM RX port receives the optical signal from the pre-amplifier and sends it to the optical cross connect.


    Note


    The COM-TX and COM-RX ports are not physical ports on the faceplate.


  • LINE-TX—The booster amplifier amplifies the composite signal coming from WXC-MUX toward the LINE-TX port.

  • LINE-RX—The pre-amplifier amplifies the composite signal coming from the LINE-RX port toward the WXC-DMX input.

Key Features

The multiplexer section of the 9-SMR17FS, 9-SMR24FS, 9-SMR34FS, 20-SMRFS, and 20-SMRFS-CV cards provide the following features:

  • Selection of any arbitrary wavelength range from any EXP-RXi ports and routing to the MUX output port.

  • Automatic VOA shutdown (AVS) blocking state on each wavelength on the MUX output port.

  • Per-channel (closed loop) power regulation on the MUX output port based on OCM block feedback.

  • Per-channel (open loop) attenuation regulation on the MUX output port, which is not based on the OCM feedback.

  • Amplification of the aggregated C-Band signal toward the LINE-TX port by the variable gain booster EDFA amplifier.

  • Combination of C-Band signals with 1510 nm by OSC MUX filter.

  • Detection of the connectivity check signal, of wavelength 97 nm, by an embedded photodiode.

The demultiplexer section of the 9-SMR17FS, 9-SMR24FS, 9-SMR34FS, 20-SMRFS, and 20-SMRFS-CV cards provide the following features:

  • Selection of any arbitrary wavelength range and routing to any EXP-TXi port.

  • AVS blocking state on each wavelength, on any of the EXP-TXi ports.

  • Per-channel (closed loop) power regulation on the EXP-TXi output port based on OCM block feedback.

  • Per-channel (open loop) attenuation regulation on the EXP-TXi output port, which is not based on the OCM feedback.

  • Amplification of the C-Band signals entering the LINE-RX port by the pre-amplifier.

  • Separation of C-Band signals from 1510 nm by OSC De-MUX filter.

  • Generation and transmission of the connectivity check signal into the DE-MUX input port.

Change Optical Amplifier Settings

Use this task to change the optical amplifier settings of cards.

Before you begin

Procedure


Step 1

Click the Provisioning > Amplifier tabs.

Step 2

Modify the settings described in the following table. The provisionable parameters are listed in the Options column in the table.

Table 2. Amplifier Options

Parameter

Description

Options

Port

(Display only) Displays the port number, port type, and direction (TX or RX).

Total Output Power (dBm)

(Display only) Shows the current power level per port.

Output Power Setpoint (dBm)

(Display only) Shows the current output power leaving the amplifier.

Working Mode

Sets the working mode.

The available options are:

  • Channel Power

  • Total Power

  • Optimized

  • Fixed Gain

  • Start and Hold

Role

Sets the role of the amplifier.

The available options are:

  • Preamplifier

  • Booster

Actual Gain (dB)

(Display only) The actual gain of the amplifiers.

Target Gain (dB)

(Display only) The target gain of the amplifiers.

Tilt Setpoint (dB)

Target output tilt requested by the user.

-5 to 5

PSD Setpoint (dBm/GHz)

Power Spectral Density. Sets the PSD setpoint. Target output power requested by the user for each circuit.

-50 to 1

PSD Optimized (dBm/GHz)

Optimized PSD

Gain Setpoint (dB)

The value of the gain that the amplifier must achieve.

Display only or numeric depending on mode setting. When the system is configured as metro core, this field is display only. When the system is configured as metro access, this field can be changed by the user.

Gain Range

Sets the gain range of the amplifier.

  • Gain Range 1

  • Gain Range 2

  • No Gain Range

Power Degrade Threshold High (dBm/GHz)

(Display only) Shows the current value of the optical power degrade high threshold configured in the card. This threshold applies only when the amplifier is active and in constant power mode.

Power Degrade High refers to the port’s Signal Output Power value and is automatically calculated by the control card when the amplifier is turned up.

Power Degrade Threshold Low (dBm/GHz)

(Display only) Shows the current value of the optical power degrade low threshold configured in the card. This threshold applies only when the amplifier is active and in constant power mode.

Power Degrade Low refers to the Signal Output Power value of the port and is automatically calculated by the control card when the amplifier is turned up.

Gain Degrade High (dB)

(Display only) Shows the current value of the gain degrade high threshold configured in the card. This threshold applies only when the amplifier is active and in constant gain mode.

Gain Degrade High refers to the Gain value of the port and is automatically calculated by the control card when the amplifier is turned up.

Gain Degrade Low (dB)

(Display only) Shows the current value of the gain degrade low threshold configured in the card. This threshold applies only when the amplifier is active and in constant gain mode.

Gain Degrade Low refers to the Gain value of the port and is automatically calculated by the control card when the amplifier is turned up.

Step 3

Click Apply to save the changes.


Provision Interface Parameters

Use this task to change the optical interface parameters of cards.

Before you begin

Procedure


Step 1

Click the Provisioning > Interface tabs.

Step 2

Modify the settings described in the following table. The provisionable parameters are listed in the Options column in the table.

Table 3. Interface Options

Parameter

Description

Options

Port

(Display only) Displays the port number, port type, and direction (RX or TX)

All the RX and TX ports

Admin State

(Display only) Displays the administrative state of the port.

From the drop-down list, choose one of the following:

  • Unlocked (ETSI)/ IS (ANSI)

  • Locked, disabled (ETSI)/OOS, DSBLD (ANSI)

  • Locked, maintenance (ETSI)/OOS, MT (ANSI)

  • Unlocked, automaticInService (ETSI)/ IS, AINS (ANSI)

Service State

(Display only) Identifies the autonomously generated state that gives the overall condition of the port. Service states appear in the format: Primary State-Primary State Qualifier, Secondary State.

  • IS-NR/

    Unlocked-enabled

  • OOS-AU,AINS/

    Unlocked-disabled,
automaticInService

  • OOS-MA,DSBLD/

    Locked-enabled,disabled

  • OOS-MA,MT/

    Locked-enabled,maintenance

Optical Power (dBm)

Displays the optical power for each port.

OSC Power (dBm)

(Display only) Displays the service channel power level for each port.

Optical PSD Setpoint (dBm/GHz)

Target output PSD requested by the user.

-50 to 10

Attenuator Value (dB)

Sets the attenuator value.

Optical Power Threshold Low (dBm)

Fail low threshold used to detect the LOS alarm on the port.

OSC Power Threshold Low (dBm)

(Display only) Shows the OSC power level for each port.

Note

 

This is not supported on the 16-AD-CCOFS card.

Current Power Degrade High (dBm)

(Display only) Shows the current value of the optical power degrade high threshold configured in the card.

Power Degrade High refers to the Signal Output Power value of the port and is automatically calculated by the control card.

Current Power Degrade Low (dBm)

(Display only) Shows the current value of the optical power degrade low threshold configured in the card.

Power Degrade Low refers to the Signal Output Power value of the port and is automatically calculated by the control card.

Current Power Failure Low (dBm)

(Display only) Shows the optical power failure low threshold for the port.

Step 3

Click Apply to save the changes.


Provision Thresholds for TCA alarms

Use this task to change the thresholds for TCA alarms raised on cards.

Before you begin

Procedure


Step 1

Click the Provisioning > Optics Thresholds tabs.

Step 2

Choose the type of threshold that you want to change, 15 Min or 1 Day.

Step 3

Modify the settings described in the following table. The provisionable parameters are listed in the Options column in the table.

Table 4. Threshold Options

Parameter

Description

Options

Interface Name

(Display only) Displays the port number, port type, and direction (RX or TX)

All the TX and RX ports

PM Type

Type of interface

opticalPowerPMTh

Low

Sets the low power warning level.

Numeric. The default is -50 dBm. Double-click the parameter, enter a value, and press Enter.

High

Sets the high power warning level.

Numeric. The default is 30 dBm. Double-click the parameter, enter a value, and press Enter.

Step 4

Click Apply to save the changes.


Provision Optical Safety

Use this task to provision the optical safety parameters for cards.

Before you begin

Procedure


Step 1

Click the Maintenance > Optical Safety tabs.

Step 2

Modify required settings described in the following table:

Table 5. Optical Safety Parameters for Cards

Parameter

Description

Options

Interface

(Display only) Displays the port name, port type, and direction.

Supported Safety

(Display only) Displays the supported safety mechanism.

  • ALS for line cards and control cards.

  • ALS-OSRI for amplifier cards.

ALS Mode

Automatic laser shutdown mode. The ALS mode is disabled for RX ALS interfaces.

From the drop-down list, choose one of the following:

  • ALS-Disabled—Deactivates ALS.

  • Automatic Restart—(Default) ALS is active. The power is automatically shut down when needed, and it automatically tries to restart using a probe pulse until the cause of the failure is repaired.

  • Manual Restart

OSRI

Optical safety remote interlock. The default value is OSRI-OFF. When set to OSRI-ON, the TX output power is shut down.

Note

 

OSRI configuration is not supported on the transponder and muxponder cards.

From the drop-down list, choose one of the following:

  • OSRI-OFF

  • OSRI-ON

ALS Status

(Display only) ALS status of the device.

  • Working

  • Shutdown

Recovery Pulse Interval

Displays the interval between two optical power pulses.

60 to 300 seconds.

Recovery Pulse Duration

Displays the duration of the optical power pulse that begins when an amplifier restarts.

2 to 100 seconds

Manual Restart

Triggers manual restart action for the ALS interface. However, manual restart does not happen if Mode is set to Automatic Restart or Disabled.

Step 3

Click Apply to save the changes.


View Insertion Loss Parameters

Use this task to view the insertion loss parameters of cards.

Before you begin

Procedure


Click the Maintenance > Insertion Loss tabs to view the insertion loss parameters.

The Insertion Loss tab displays the following information:

  • Insertion Loss Path—Displays the insertion loss path.

  • IL Value (dB)—Displays the insertion loss value.

Note

 

When the card is removed, the last retrieved Insertion Loss values are displayed in the SVO web UI. When the card is replaced, the Insertion Loss values are updated in the SVO web UI.