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This chapter provides descriptions and specifications for the Cisco ONS 15200 modules, sometimes referred to as a card or blade. For detailed information about each module, consult the Cisco ONS 15200 Module Handbook.
The ONS 15200 has thirteen modules, four active and nine passive. The following paragraphs describe the four active modules in the ONS 15200 system:
The following paragraphs describe the nine passive modules in the ONS 15200 system:
The CLIP module provides the input port from the client layer to the integrated ONS 15200 system, and the output port from the integrated ONS 15200 to the client layer. The CLIP module receives an optical input signal from the client layer in either the 1310 nm or 1550 nm wavelength regions and converts the optical signal to a specific International Telecommunication Union (ITU-T) G.692-compatible wavelength. The CLIP module then transfers the converted optical signal to the DWDM side of the ONS 15200 network.
When the CLIP module receives the optical signal from the DWDM side of the ONS 15200 network, the CLIP module converts the selected optical signal to the 1310 nm wavelength region and delivers it to the client layer. If the ONS 15200 system is optically protected (that is, the optical signal is carried on two routes), the CLIP module selects which optical signal to transfer to the client layer. You can install a CLIP module in either the ONS 15252 Multichannel Unit (MCU) or the ONS 15201 Single-Channel Unit (SCU).
When the CLIP modules are not installed, attach front covers for electromagnetic compatibility and electromagnetic interference (EMC/EMI) precautions.
Release 1.1 provides a new CLIP module that incorporates both clocked (3R) and unclocked (2R) data regeneration. You can set the mode of operation (2R or 3R) using the management interfaces. The new 2R/3R CLIP is fully compatible with the existing 3R CLIP. The 2R/3R CLIP is user configurable for unprotected or fiber protected operation.
In addition, Release 1.1 provides two dispersion tolerances: 1800 ps/nm at 0 and 7 dBm, and 3000 ps/nm at 0 dBm.
Restrictions exist for CLIP replacement based on whether you are using a plenum or a fan unit in the ONS 15252 MCU. Table 5-1 identifies the CLIP restrictions.
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Note CLIP replacement restrictions are related to mean time between failure (MTBF) performance and not NEBS-2 compliance. |
| ONS 15252 Equipment | CLIP Version | Maximum number of CLIPs | Restriction | Maximum temperature |
|---|---|---|---|---|
The CIM allows you to extend the ONS 15252 MCU internal controller area network (CAN) bus to another ONS 15252 MCU or to an ONS 15201 SCU. Extending the CAN bus allows you to configure several network elements (NEs) into a larger functional unit. The CIM also provides the local craft interface to the Maintenance Manager software package, and the Electronic Industry Association/Telecommunication Industry Association (EIA/TIA) EIA/TIA-232 access interface to the ONS 15252 MCU via an EIA/TIA-232 cable. The CIM is installed in the ONS 15252 MCU. The CIM and the NCB module communicate using ONS 15252 MCU backplane.
The NAM splits the outgoing optical signal from the CLIP module (one of the DWDM wavelengths or channels) before transferring it to the passive optical shelf (located in the lower part of the ONS 15252 MCU). The NAM split ratio can be 100/0, 90/10, 50/50, 10/90, or 0/100. Unprotected channels use the split ratios 100/0 and 0/100. Protected channels use the split ratios 90/10, 50/50, and 10/90.
The NAM transfers the signal to the passive optical shelf in the following patterns:
The HFMs collect the incoming optical signals from the DWDM side of the ONS 15200 system and transfer the outgoing signals to the DWDM side of the ONS 15200 system. The NAMs then transfer these incoming/outgoing optical signals to/from the CLIP modules.
The NCB module is the hardware platform for the Subnetwork Manager (SNM) software package, which you access using the Ethernet connector on the front of the NCB module. The NCB supervises, administers, and monitors the ONS 15200. In addition to controlling all of the ONS 15200 system CLIP modules, the NCB module collects information about system status, alarms, parameters, and actions on the internal data bus. You can also store performance monitoring data on the NCB and upload the data to external media.
Release 1.1 supports multiple NCBs on the CAN bus; however, you can only configure two active NCBs as managers of any CLIP in a network. Any NCB in a network that is not provisioned as an active manager of a CLIP can still inventory the CLIP. Release 1.0.1 only supports one NCB on the CAN bus.
In addition to alarm lines on the internal data bus, the NCB has three dedicated LEDs. When lit, the LEDs indicate the status shown in Table 5-2.
| LED | Status |
|---|---|
The ONS 15200 system can function without the NCB module. When you choose not to use an NCB module, mount a front cover in its place for EMC/EMI precautions. The front cover used in place of the NCB module is narrower than the front cover used in place of the CLIP module. Do not interchange the two types of front covers.
The BM, installed in the passive optical shelf, transfers the remainder of the incoming optical signal from the A side to the B side and from the B side to the A side. The BM allows the portion of the optical signal that is not intended for the node to bypass the node. If all incoming optical signal wavelengths terminate at the node, you can use two Termination modules (TMs) instead of a BM. TMs reduce optical crosstalk.
The CFM combines the functionality of the Hub Filter module (HFM) and the NAM in the ONS 15201 SCU. The CFM transfers optical signals between the DWDM side of the ONS 15200 system and the CLIP module.
The CMX provides a bridge between the A side of one ONS 15252 MCU and the B side of another ONS 15252 MCU. Using a CMX allows you to extend the bandwidth capability of the ONS 15252 MCU passive optical shelf.
The CMY provides a bridge between the A side of one ONS 15252 MCU and the A side of another ONS 15252 MCU. Alternatively, the CMY provides a bridge between the B side of one ONS 15252 MCU and the B side of another ONS 15252 MCU. The CMY allows you to extend the bandwidth capability of the passive optical shelf.
The Dummy Filter module (DFM) mechanically stabilizes the optical filter modules. The DFM resides in the passive optical shelf of the ONS 15252 MCU.
The DNAM replaces a Network Adaptation module (NAM) when a NAM is not installed.
The HFM filters one wavelength from the incoming DWDM optical signal and transfers the remainder of the wavelengths to subsequent HFMs. The HFMs each add one wavelength to the outgoing DWDM optical signal. The HFM is located to the right of the Line module (LM) on the A side of the ONS 15252 MCU and to the left of the LM on the B side of the ONS 15252 MCU. The row of HFMs must end with either a BM, a TM, a CMX, or a CMY.
The LM receives an incoming aggregate optical signal from the DWDM side of the ONS 15200 system and transfers the outgoing aggregate optical signal to the DWDM side of the ONS 15200 system. A pair of LMs, one for the A side and one for B side, reside in the passive optical shelf of the ONS 15252 MCU. The LM contains the monitoring ports for both the incoming and outgoing traffic streams. The split ratio of the monitoring ports is 10/90. The external interface on the LM can be either an SC or an FC optical connector.
Install a TM in the passive optical shelf of the ONS 15252 MCU after the you have installed the HFMs. Insert the TM to the right of the HFMs on the A-side of ONS 15252 MCU and to the left of the HFMs on the B-side of the ONS 15252 MCU in place of the BM. The TMs terminate the optical signal and improve crosstalk. The TMs can replace the BM when all traffic terminates at the ONS 15252 MCU.
Posted: Thu Apr 17 12:32:24 PDT 2003
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