The 40-DMX-C (or 40-DMX-CE) card works in combination with the 40-WSS-C (or 40-WSS-CE) card to implement ROADM functionality. As a ROADM node, the node can be configured at the optical channel level using CTC, Cisco Transport Planner, and CTM. ROADM functionality using the 40-DMX-C (or 40-DMX-CE) card requires two single-slot 40-DMX-C (or 40-DMX-CE) cards and two 40-WSS-C (or 40-WSS-CE) double-slot cards (for a total of six slots in the chassis).

For other cards’ ROADM functionality, see that card’s description in this chapter. For a diagram of a typical ROADM configuration, see the section, ROADM Node in the Cisco NCS 2002 and NCS 2006 Network Operations Guide.

Physical photodiodes P1 through P40 monitor the power at the outputs of the 40-DMX-C or 40-DMX-CE card. P41 monitors the total multiplexed power at the input, calibrated to the COM-RX port. The following table shows the returned power level values calibrated to each port.

For information on the associated TL1 AIDs for the optical power monitoring points, refer the “CTC Port Numbers and TL1 Aids” section in Cisco NCS TL1 Command Guide.

This table shows the 40 ITU-T 100-GHz-spaced, C-band channels (wavelengths) that are demultiplexed by the 40-DMX-C card.

This table shows the 40 ITU-T 100-GHz-spaced, C-band channels (wavelengths) that are demultiplexed by the 40-DMX-CE card.

The following section lists procedures and tasks related to the configuration of the 40-DMX-C or 40-DMX-CE card:

• NTP-G140 Installing Fiber-Optic Cables Between Terminal, Hub, or ROADM Nodes
• NTP-G152 Creating and Verifying Internal Patchcords
• NTP-G37 Running Automatic Node Setup
• NTP-G59 Creating, Deleting, and Managing Optical Channel Network Connections
• NTP-G51 Verify DWDM Node Turn Up
• DLP-G141 View Optical Power Statistics for 32WSS, 32WSS-L, 32DMX, 40-WSS-C, 40-WSS-CE, 40-WXC-C, 80-WXC-C, 16-WXC-FS, 40-MUX-C, 40-DMX-C, and 40-DMX-CE Cards
• NTP-G175 Modifying Line Card Settings and PM Thresholds for Multiplexer and Demultiplexer Cards

Physical photodiodes P1 through P40 monitor the power of the individual input ports to the 40-MUX-C card. P41 monitors the total multiplexed output power, calibrated to the COM-TX port. The following table shows the returned power level values calibrated to each port.

For information on the associated TL1 AIDs for the optical power monitoring points, refer the “CTC Port Numbers and TL1 Aids” section in Cisco NCS TL1 Command Guide.

Table 1 shows the 40 ITU-T 100-GHz-spaced, C-band channels (wavelengths) that are multiplexed by the 40-MUX-C card.

The following section lists procedures and tasks related to the configuration of the 40-MUX-C card:

• NTP-G140 Installing Fiber-Optic Cables Between Terminal, Hub, or ROADM Nodes
• NTP-G152 Creating and Verifying Internal Patchcords
• NTP-G37 Running Automatic Node Setup
• NTP-G59 Creating, Deleting, and Managing Optical Channel Network Connections
• NTP-G51 Verify DWDM Node Turn Up
• DLP-G141 View Optical Power Statistics for 32WSS, 32WSS-L, 32DMX, 40-WSS-C, 40-WSS-CE, 40-WXC-C, 80-WXC-C, 16-WXC-FS, 40-MUX-C, 40-DMX-C, and 40-DMX-CE Cards
• NTP-G175 Modifying Line Card Settings and PM Thresholds for Multiplexer and Demultiplexer Cards

The 40-WSS-C (or 40-WSS-CE) card works in combination with the 40-DMX-C (or 40-DMX-CE) card to implement ROADM functionality. As a ROADM node, the node can be configured at the optical channel level using CTC, Cisco Transport Planner, and CTM. ROADM functionality using the 40-WSS-C (or 40-WSS-CE) card requires two 40-WSS-C (or 40-WSS-CE) double-slot cards and two 40-DMX-C (or 40-DMX-CE) single-slot cards (for a total of six slots in the chassis).

For information about ROADM functionality for other cards, see that card’s description in this chapter. For a diagram of a typical ROADM configuration, see the section, ROADM Node in the Cisco NCS 2002 and NCS 2006 Network Operations Guide.

The 40-WSS-C (or 40-WSS-CE) has physical diodes that monitor power at various locations on the card. The following table lists the physical diode descriptions.

For information on the associated TL1 AIDs for the optical power monitoring points, refer the “CTC Port Numbers and TL1 Aids” section in Cisco NCS TL1 Command Guide.

Additionally, the 40-WSS-C (or 40-WSS-CE) has two virtual diodes. Virtual diodes are monitor points for each physical photodiode; they are identified with a physical diode relative to the way that the physical diode is identified with one of the two interlink (ILK) ports. The following table lists the virtual diodes.

Table 1 shows the 40 ITU-T 100-GHz-spaced, C-band channels (wavelengths) that are switched by the 40-WSS-C card.

Table 2 shows the 40 ITU-T 100-GHz-spaced, C-band channels (wavelengths) that are switched by the 40-WSS-CE card.

The following section lists procedures and tasks related to the configuration of the 40-WSS-C or 40-WSS-CE card:

• NTP-G140 Installing Fiber-Optic Cables Between Terminal, Hub, or ROADM Nodes
• NTP-G152 Creating and Verifying Internal Patchcords
• NTP-G37 Running Automatic Node Setup
• NTP-G59 Creating, Deleting, and Managing Optical Channel Network Connections
• NTP-G51 Verify DWDM Node Turn Up
• DLP-G141 View Optical Power Statistics for 32WSS, 32WSS-L, 32DMX, 40-WSS-C, 40-WSS-CE, 40-WXC-C, 80-WXC-C, 16-WXC-FS, 40-MUX-C, 40-DMX-C, and 40-DMX-CE Cards
• NTP-G93 Modifying the WSS Card Line Settings and PM Thresholds

The 40-WXC-C has 83 physical diodes (P1 through P40) that monitor power at the outputs of the card. The following table describes the physical diodes.

For information on the associated TL1 AIDs for the optical power monitoring points, refer the “CTC Port Numbers and TL1 Aids” section in Cisco NCS TL1 Command Guide.

Additionally, the 40-WXC-C has two virtual diodes. Virtual diodes are monitor points for each physical photodiode; they are identified with a physical diode relative to the way that the physical diode is identified with one of the two interlink (ILK) ports. The following table lists the virtual diodes.

The usage of WXC and mesh PP power readings to troubleshoot a LOS-P in WXC COM TX port in Side A is described in the following example. The example is explained assuming a single wavelength 1558.17 in the setup that comes from Side H to Side A. If there is more than one wavelength, then there is a risk of dropping traffic when pulling common fibers. The example is explained below:

When the wavelength from side H is 1558.17, you can check the power reading at WXC EXP TX port of the WXC card and verify the consistency with side H pre output power and WXC COMRX-EXPTX port loss. You can also check with a power meter connected to the 8th fiber (since it is from side H) of an MPO-FC (or LC) cable connected to the TAP-TX port of the MESH-PP. This value should be consistent with the previous reading, less than the insertion loss of the installed PP-MESH. If it is consistent, the issue is with the MPO between side A WXC and PP-MESH. If it is not consistent, the issue is with the PP-MESH or the LC-LC from side H. With only the PP-MESH already tested during installation, the only issue can be with the patch cord b.

You can check if the 1558.17 wavelength from side H is unequalized (that is, if the channel is not aligned with the linear fit of the power values of the other channels) by keeping the DMX COM-RX port of side H in maintenance, and checking both the signal and ASE levels of CHAN-TX ports of the DMX card. If the channel is equalized (that is, if the channel is aligned with the linear fit of the power values of the other channels), then the issue is in the WXC side A that cannot properly regulate the VOA for such channel. If the channel is unequalized, then the issue is on a remote node.

Note	With an OSA or a spare 40 DMX, you can see the light coming from all the sides from TAP-TX of the PP-MESH.

Table 1 shows the 40 ITU-T 100-GHz-spaced, C-band channels (wavelengths) that are cross connected by the 40-WXC-C card.

The following section lists procedures and tasks related to the configuration of the 40-WXC-C card:

• NTP-G140 Installing Fiber-Optic Cables Between Terminal, Hub, or ROADM Nodes
• NTP-G185 Installing Fiber-Optic Cables between Mesh Nodes
• NTP-G152 Creating and Verifying Internal Patchcords
• NTP-G37 Running Automatic Node Setup
• NTP-G59 Creating, Deleting, and Managing Optical Channel Network Connections
• NTP-G51 Verify DWDM Node Turn Up
• DLP-G141 View Optical Power Statistics for 32WSS, 32WSS-L, 32DMX, 40-WSS-C, 40-WSS-CE, 40-WXC-C, 80-WXC-C, 16-WXC-FS, 40-MUX-C, 40-DMX-C, and 40-DMX-CE Cards
• NTP-G174 Modifying Line Settings and PM Thresholds for 40-WXC-C, 80-WXC-C, or 16-WXC-FS Cards

The 80-WXC-C has two physical photodiodes and an OCM unit that monitors power at the different ports of the card. The following table describes the physical photodiodes.

For information on the associated TL1 AIDs for the optical power monitoring points, see the “CTC Port Numbers and TL1 Aids” section in the Cisco NCS TL1 Command Guide.

Additionally, the 80-WXC-C has two virtual photodiodes. The following table lists the virtual photodiodes.

The following table shows the 80 ITU-T 50-GHz-spaced, C-band channels (wavelengths) that are cross connected by the 80-WXC-C card.

The following section lists procedures and tasks related to the configuration of the 80-WXC-C card:

• NTP-G140 Installing Fiber-Optic Cables Between Terminal, Hub, or ROADM Nodes
• NTP-G185 Installing Fiber-Optic Cables between Mesh Nodes
• NTP-G152 Creating and Verifying Internal Patchcords
• NTP-G37 Running Automatic Node Setup
• NTP-G59 Creating, Deleting, and Managing Optical Channel Network Connections
• NTP-G51 Verify DWDM Node Turn Up
• DLP-G141 View Optical Power Statistics for 32WSS, 32WSS-L, 32DMX, 40-WSS-C, 40-WSS-CE, 40-WXC-C, 80-WXC-C, 16-WXC-FS, 40-MUX-C, 40-DMX-C, and 40-DMX-CE Cards
• NTP-G174 Modifying Line Settings and PM Thresholds for 40-WXC-C, 80-WXC-C, or 16-WXC-FS Cards

The 16-WXC-FS card has these ports:

• EXP-TXi (where i = 1 to 16)—The EXP TX port sends the split-off optical signal that contains pass-through channels to the other side of the NE. For example, in four degrees setup, the EXP ports can be used as drop Tx ports, EXP-Tx(1 to 4) are used as express channel from one side to other side. The 5th to 16th EXP-Tx ports are used to transmit the power to passive units.

• EXP-RXi (where i = 1 to 16)—The EXP RX port receives the optical signal from the pass-through channels. For example, in four degrees setup, the EXP ports can be used as drop Rx ports, EXP-Rx(1 to 4) are used to receive power from the express channel from one side to other. The 5th to 16th EXP-Rx ports are used to receive the power from the passive units.

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

• COM-RX—The COM RX port receives the optical signal from a preamplifier card and sends it to the optical cross connect.

• UPG-TX—The UPG TX port can be used to drop channels and transmits power to the preamplifier card. This port can also be used to increase the number of ports by connecting to another 16-WXC-FS card.

• UPG-RX-The UPG RX port can be used to add channels and receives power from the preamamplifer card. This port can also be used to increase the number of ports by connecting to another 16-WXC-FS card.

Two LC-duplex adapters are required to connect COM and UPG ports, and four MPO connectors to connect add/drop ports of the 16-WXC card. All the 16 I/O ports of the 16-WXC-FS card can be used either for node interconnection or for add/drop.

The 16-WXC-FS card provides these features when used in multiplexer mode:

• The card allows you to select a single 50-GHz spaced channel or any combination of the aggregated 96 channels grid on the COM-TX port.

• The combination of input signals from the 16 EXP-RX ports and the UPG-RX port into COM-TX port.

• The selection of an arbitrary wavelength range or different wavelength ranges, with a common insertion loss value on the COM-TX port.

• Automatic VOA shutdown (AVS) blocking state on each wavelength on the COM-TX port.

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

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

The 16-WXC-FS card provides these features when used in de-multiplexer mode:

• The card allows you to select a single 50-GHz spaced channel or any combination of the aggregated 96 channels grid on any of the 16 EXP-TX port.

• Splitting of the input signal from COM-RX port into a total of 16 EXP-TX ports and 1 UPG-TX port.

• AVS blocking state on each wavelength on any of the 16 EXP-TX ports.

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

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

• Selection of an arbitrary wavelength range or of different wavelength ranges, with a common insertion loss value on any of the 16 EXP-TX ports.

• DWDM Optical amplifier(s) partially compensates the loss of couplers or splitters and wavelength blockers.

The 16-WXC-FS card has two physical photodiodes and an OCM unit that monitors power at the different ports of the card.

For information on associated TL1 AIDs for the optical power monitoring points, see the “CTC Port Numbers and TL1 Aids” section in the TL1 Command Guide.

The OCM unit provides per-channel optical power monitoring on these ports:

• COM-TX and COM-RX ports

• UPG-TX and UPG-RX ports

• EXP-TXi (where i = 1 to 16) ports in output direction

• EXP-RXi (where i = 1 to 16) ports in input direction

The following section lists procedures and tasks related to the configuration of the 16-WXC-FS card:

• NTP-G140 Installing Fiber-Optic Cables Between Terminal, Hub, or ROADM Nodes
• NTP-G185 Installing Fiber-Optic Cables between Mesh Nodes
• NTP-G152 Creating and Verifying Internal Patchcords
• NTP-G37 Running Automatic Node Setup
• NTP-G59 Creating, Deleting, and Managing Optical Channel Network Connections
• NTP-G51 Verify DWDM Node Turn Up
• DLP-G141 View Optical Power Statistics for 32WSS, 32WSS-L, 32DMX, 40-WSS-C, 40-WSS-CE, 40-WXC-C, 80-WXC-C, 16-WXC-FS, 40-MUX-C, 40-DMX-C, and 40-DMX-CE Cards
• NTP-G174 Modifying Line Settings and PM Thresholds for 40-WXC-C, 80-WXC-C, or 16-WXC-FS Cards

The optical amplifier units in the SMR-C cards provide the following features:

• Embedded gain flattening filter

• Mid-stage access for dispersion compensation unit (only applicable for preamplifier erbium-doped fiber amplifier [EDFA])

• Fixed output power mode

• Fixed gain mode

• Nondistorting low-frequency transfer function

• Amplified spontaneous emissions (ASE) compensation in fixed gain and fixed output power mode

• Fast transient suppression

• Programmable tilt (only applicable for preamplifier EDFA)

• Full monitoring and alarm handling capability

• Optical safety support through signal loss detection and alarm at any input port, fast power down control, and reduced maximum output power in safe power mode.

• EDFA section calculates the signal power, by taking into account the expected ASE power contribution to the total output power. The signal output power or the signal gain can be used as feedback signals for the EDFA pump power control loop.

The 1x2 WXC unit (40-SMR1-C card) provides the following features:

• Selection of individual wavelength of the aggregated 100GHz signal from either the EXP-RX or ADD-RX ports

• Automatic VOA shutdown (AVS) blocking state on each wavelength and port

• Per-channel power regulation based on external OCM unit

• Open loop path attenuation control for each wavelength and port

The 1x4 WXC unit (40-SMR2-C card) provides the following features:

• Selection of individual wavelength of the aggregated 100GHz signal from either the EXPi-RX (where i = 1, 2, 3) or ADD-RX ports

• Automatic VOA shutdown (AVS) blocking state on each wavelength and port

• Per-channel power regulation based on external OCM unit

• Open loop path attenuation control for each wavelength and port

The OCM unit provides per channel optical power monitoring at EXP-RX, ADD-RX, DROP-TX, and LINE-TX ports.

The 40-SMR1-C card includes a 100Ghz 1x2 WXC unit with integrated preamplifier unit (single EDFA).

The 40-SMR1-C card has the following types of ports:

• MON RX: The MON RX port monitors power on the EXP-TX output port.

• MON TX: The MON TX port monitors power on the LINE-TX output port.

• DC RX: The DC RX port receives the optical signal from the dispersion compensating unit (DCU) and sends it to the second stage preamplifier input.

• DC TX: The DC TX port sends the optical signal from the first stage preamplifier output to the DCU.

• OSC RX: The OSC RX port is the OSC add input port.

• OSC TX: The OSC TX port is the OSC drop output port.

• ADD/DROP RX: The ADD RX port receives the optical signal from the multiplexer section of the NE and sends it to the 1x2 WXC unit.

• ADD/DROP TX: The DROP TX port sends the split off optical signal to the demultiplexer section of the NE.

• LINE RX: The LINE RX port is the input signal port.

• LINE TX: The LINE TX port is the output signal port.

• EXP RX: The EXP RX port receives the optical signal from the other side of the NE and sends it to the 1x2 WXC unit.

• EXP TX: The EXP TX port sends the split off optical signal that contains pass-through channels to the other side of the NE.

The following figure shows a block diagram of the 40-SMR1-C card.

Figure 6. 40-SMR1-C Block Diagram

The different units of the 40-SMR1-C card are:

• OSC filter—The OSC filter allows to add an OSC channel to the C-band in the transmission path and to drop an OSC channel on the receiving path. The OSCM card that is connected to the OSC-TX and OSC-RX ports generates the OSC channel.

• Double-stage variable gain EDFA preamplifier—The double-stage preamplifier allows the insertion of a DCU between the DC-TX and DC-RX ports to compensate for chromatic dispersion. It is also equipped with built-in variable optical attenuator (VOA) and gain flattening filter (GFF) that provides tilt compensation and enables the use of this device over an extended range of span losses (5 dB to 35 dB).

• 70/30 splitter and VOA—The output signal from the preamplifier is split in a 70%-to-30% ratio, 70% is sent on the pass-through path (EXP-TX port) and 30% is sent on the drop path (DROP-TX port). The VOA equipped on the drop path is used to match the power range of the receiver photo diode without the need for bulk attenuation. If a channel is expected to be dropped in the 40-SMR1-C card, the pass-through channel is stopped after the EXP-TX port either by a 40-WSS-C, 40-SMR1-C, or 40-SMR2-C card.

• 1x2 WXC—The 1x2 WXC aggregates on its output port a 100-GHz-spaced optical channel received from either its ADD-RX or EXP-RX port. In addition to the switching function, the 1x2 WXC allows to set a different per channel power for each of the managed wavelengths and also monitor the optical power.

• OCM—The OCM provides per channel power monitoring on the DROP-RX, EXP-RX, ADD-RX, and LINE-TX ports. The power value for each wavelength is refreshed after a variable timer depending on the port and card activity.

The 40-SMR2-C card includes a 100Ghz 1x4 WXC unit with integrated preamplifier and booster amplifier units (double EDFA).

The 40-SMR2-C card has the following types of ports:

• MON RX: The MON RX port monitors power on the EXP-TX output port.

• MON TX: The MON TX port monitors power on the LINE-TX output port.

• DC RX: The DC RX port receives the optical signal from the dispersion compensating unit (DCU) and sends it to the second stage preamplifier input.

• DC TX: The DC TX port sends the optical signal from the first stage preamplifier output to the DCU.

• OSC RX: The OSC RX port is the OSC add input port.

• OSC TX: The OSC TX port is the OSC drop output port.

• ADD/DROP RX: The ADD RX port receives the optical signal from the multiplexer section of the NE and sends it to the 1x4 WXC unit.

• ADD/DROP TX: The DROP TX port sends the split off optical signal to the demultiplexer section of the NE.

• LINE RX: The LINE RX port is the input signal port.

• LINE TX: The LINE TX port is the output signal port.

• EXP TX: The EXP TX port sends the split off optical signal that contains pass-through channels to the other side of the NE.

• EXPi-RX (where i = 1, 2, 3): The EXPi-RX port receives the optical signal from the other side of the NE and sends it to the 1x4 WXC unit.

The following figure shows a block diagram of the 40-SMR2-C card.

Figure 7. 40-SMR2-C Block Diagram

The different units of the 40-SMR2-C card are:

• OSC filter—The OSC filter allows to add an OSC channel to the C-band in the transmission path and to drop an OSC channel on the receiving path. The OSCM card that is connected to the OSC-TX and OSC-RX ports generates the OSC channel.

• Double-stage variable gain EDFA preamplifier—The double-stage preamplifier allows the insertion of a DCU between the DC-TX and DC-RX ports to compensate for chromatic dispersion. It is also equipped with built-in variable optical attenuator (VOA) and gain flattening filter (GFF) that provides tilt compensation and enables the use of this device over an extended range of span losses (5 dB to 35 dB).

• 70/30 splitter and VOA—The output signal from the preamplifier is split in a 70%-to-30% ratio, 70% is sent on the pass-through path (EXP-TX port) and 30% is sent on the drop path (DROP-TX port). The VOA equipped on the drop path is used to match the power range of the receiver photo diode without the need for bulk attenuation. If a channel is expected to be dropped in the 40-SMR2-C card, the pass-through channel is stopped after the EXP-TX port by a 40-WSS-C, 40-SMR1-C, or 40-SMR2-C card.

• 1x4 WXC—The 1x4 WXC aggregates on its output port a 100-GHz-spaced optical channel received from either its ADD-RX or EXPi-RX (where i = 1, 2, 3) port. In addition to the switching function, the 1x4 WXC allows to set a different per channel power for each of the managed wavelengths and also monitor the optical power.

• Single-stage fixed gain EDFA booster amplifier—The booster amplifier amplifies the output signal from the 1x4 WXC unit before transmitting it into the fiber. Since it is a fixed gain (17 dB) amplifier, it does not allow gain tilt control.

• OCM—The OCM provides per channel power monitoring on the DROP-RX, EXPi-RX (where i = 1, 2, 3), ADD-RX, and LINE-TX ports. The power value for each wavelength is refreshed after a variable timer depending on the port and card activity.

The following section lists procedures and tasks related to the configuration of the 40-SMR-1C and 40-SMR-2C cards:

• NTP-G140 Installing Fiber-Optic Cables Between Terminal, Hub, or ROADM Nodes
• NTP-G185 Installing Fiber-Optic Cables between Mesh Nodes
• NTP-G152 Creating and Verifying Internal Patchcords
• NTP-G37 Running Automatic Node Setup
• NTP-G243 Performing the Two-Degree ROADM Node with 40-SMR-1-C and OPT-AMP-17-C Cards Acceptance Test
• NTP-G244 Performing the Four Degree ROADM Node with 40-SMR-2-C Cards Acceptance Test
• NTP-G59 Creating, Deleting, and Managing Optical Channel Network Connections
• NTP-G51 Verify DWDM Node Turn Up
• DLP-G141 View Optical Power Statistics for 32WSS, 32WSS-L, 32DMX, 40-WSS-C, 40-WSS-CE, 40-WXC-C, 80-WXC-C, 16-WXC-FS, 40-MUX-C, 40-DMX-C, and 40-DMX-CE Cards
• NTP-G241 Modifying the Line Settings and PM Thresholds for 40-SMR1-C and 40-SMR2-C Cards