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.
|
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.
Feedback