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This chapter provides descriptions and specifications for the Cisco ONS 15200 modules. 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 four active modules in the ONS 15200 system include:
The passive modules in the ONS 15200 system include:
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.
The optical signal received from the DWDM side of the ONS 15200 network is transferred to the CLIP module. 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. The CLIP module converts the selected optical signal to the 1310 nm wavelength region and delivers it 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) reasons.
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 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. The split ratios 100/0 and 0/100 are used for unprotected channels. The split ratios 90/10, 50/50, and 10/90 are used for protected channels. The signal can be transferred to the passive optical shelf in the following patterns:
In addition, the NAMs carry information from their associated CLIP modules via the ONS 15252 MCU backplane. The information is then transferred to the front of the NAMs.
The HFMs collect the incoming optical signals from the DWDM side of the ONS 15200 system. The incoming optical signals are then transferred to the CLIP modules through the NAMs.
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. When installing the NCB, it install it in upper-right slot of the ONS 15252 MCU; however, the ONS 15200 system can function without the NCB module. When you choose to not use an NCB module, mount a front cover in its place for EMC/EMI reasons. 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.
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 5-1.
| LED | Status |
|---|---|
Red | Critical or major alarm |
Yellow | Minor alarm or warning |
Green | Power on |
The BM is installed in the passive optical shelf of the ONS 15252 MCU. The BM 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 are terminated at the node, the BM should be replaced by Terminator modules (TM), because 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. In this manner, you can extend 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 bridge allows you to extend the passive optical shelf.
The Dummy Filter module (DFM) mechanically stabilize the optical filter modules. The DFM belongs 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 DNAMs provide EMC/EMI protection.
The HFM filters one wavelength from the incoming DWDM optical signal and transfers the remainder of the DWDM optical signal to subsequent HFMs. The HFMs each add one wavelength to the outgoing DWDM optical signal. The HFM location is 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. The LMs also transfer 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, are normally installed in the passive optical shelf of the ONS 15252 MCU. The monitoring ports for both the incoming and outgoing traffic streams are located on the LM. The split ratio of the monitoring ports is 10/90. The external interface on the LM can be either an SC or an FC type optical connector.
The TM is installed in the passive optical shelf of the ONS 15252 MCU after the HFMs are installed. The TM is installed 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 replace the BM when all traffic terminates at the ONS 15252 MCU.
Posted: Mon Sep 30 20:44:00 PDT 2002
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