Cisco Systems ONS 15200 manual ONS 15201 SCU

Chapter 3 Product Hardware

Modularity and Ancillary Equipment

Caution

Caution

Caution

ONS 15252 Releases 1.0.1 and later include a fan unit. Before using the Release 1.0.1 shelf, you must install the fan unit. Do not use the fan unit with a Release 1.0 shelf. See the “Fan Unit” section on page 3-4for more information about the fan unit.

You must install the fan unit in a Release 1.0.1 shelf. Running the Release 1.0.1 shelf without the fan unit will result in a unit that is not compliant to any specifications, nor is warranted or supported by Cisco. In addition, such usage may result in equipment damage.

Do not install the fan unit in a Release 1.0 shelf. Running the Release 1.0 shelf with a fan unit will result in a unit that is not compliant to any specifications, nor is warranted or supported by Cisco. In addition, such usage may result in equipment damage.

ONS 15252 Releases 1.0.1and later include an updated Network Adaptation module (NAM). The Release 1.0.1 NAM has a “NEBS-3 compliant” label on the faceplate, whereas the previous version of the NAM does not have a faceplate label. The Release 1.0.1 shelf requires the Release 1.0.1 NAM. You can also use Release 1.0.1 NAMs in the Release 1.0 shelf. See the Cisco ONS 15200 Module Handbook for more information about the NAM.

Placing NAMs without the “NEBS-3 compliant” label into an Release 1.0.1 shelf may result in equipment damage.

3.1.2 ONS 15201 SCU

The ONS 15201 SCU communicates with the other nodes in the ONS 15200 system on a specific wavelength or channel. The SCU uses a single CLIP module. From the DWDM layer, several channels of information, each occupying a wavelength, enter the ONS 15201 SCU. Each DWDM channel of information can enter the ONS 15201 SCU from the A side, the B side, or the A side and B side.

The Collector Filter module (CFM) drops and transfers the specific channel or wavelength intended for the ONS 15201 SCU to the CLIP module. For protected channels, the CFM drops the channel from the A side and B side. For unprotected channels, the CFM drops the channel from either the A side or B side.

The CLIP transfers information originating at the ONS 15201 to the CFM for protected channels. The CFM splits the information and transmits it at a specific wavelength or channel in opposite directions on the A side and B side. The CFM does not split unprotected channels; it transmits them directly to either the A side or B side. Information carried on a wavelength or channel intended for another ONS 15200 node passes through the ONS 15201 SCU without interference except for the insertion loss caused by the unit. Figure 3-3shows a functional representation of an ONS 15201 SCU.

Cisco ONS 15200 Product Description

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